GMC 1986 P-Truck User manual

LIGHT DUTY TRUCKS

FOREWORD
This service manual contains diagnosis, “On-Vehicle” maintenance, and light re
pair for Light Dut Truck Models (“C-K, P-Truck, and G-Van”). Procedures involving
disassembl and assembl of major components for these vehicles are published in a
separate “Truck Unit Repair Manual.” Wiring diagrams for these models are also
published in a separate “Truck Wiring Diagram” booklet.
This manual should be kept in a hand place for read reference. If properl used, it
will meet the needs of technicians and vehicle owners.
CAUTION:
These vehicles contain some parts dimensioned in the metric s stem as well as in
the customar s stem. Some fasteners are metric and are ver close in dimension to
familiar customar fasteners in the inch s stem. It is important to note that, during an
vehicle maintenance procedures, replacement fasteners must have the same mea
surements and strength as those removed, whether metric or customar . (Numbers on
the heads of metric bolts and on surfaces of metric nuts indicate their strength. Cus
tomar bolts use radial lines for this purpose, while most customar nuts do not have
strength markings.) Mismatched or incorrect fasteners can result in vehicle damage or
malfunction, or possibl personal injur . Therefore, fasteners removed from the vehi
cle should be saved for re-use in the same location whenever possible. Where the
fasteners are not satisfactor for re-use, care should be taken to select a replacement
that matches the original. For information and assistance, see our authorized dealer.
GMC TRUCK & COACH OPERATION
TRUCK & BUS GROUP
General Motors Corporation
Pontiac, Michigan

CAUTION
To reduce the chance of personal injur and/or propert damage, the follow
ing instructions must be carefull observed.
Proper service and repair are important to the safet of the service techni
cian and the safe, reliable operation of all motor vehicles. If part replacement
is necessar , the part must be replaced with one of the same part number or
with an equivalent part. Do not use a replacement part of lesser qualit .
The service procedures recommended and described in this service
manual are effective methods of performing service and repair. Some of these
procedures require the use of tools speciall designed for the purpose.
Accordingl , an one who intends to use a replacement part, service proce
dure or tool, which is not recommended b the vehicle manufacturer, must
first determine that neither his safet nor the safe operation of the vehicle will
be jeopardized b the replacement part, service procedure or tool selected.
It is important to note that this manual contains various Cautions and No
tices that must be carefull observed in order to reduce the risk of personal
injur during service or repair, or the possibilit that improper service or repair
ma damage the vehicle or render it unsafe. It is also important to understand
that these ‘Cautions’ and ‘Notices’ are not exhaustive, because it is impossi
ble to warn of all the possible hazardous consequences that might result from
failure to follow these instructions.

1986
LIGHT DUTY
TRUCK
SERVICE
MANUAL
C-K, P-TRUCK
AND G-VAN
MODELS
The Table of Contents on this page in
dicates the sections covered in this
manual. At the beginning of each individ
ual section is a Table of Contents which
gives the page number on which each
major subject begins.
When reference is made in this manual
to a brand name, number, or specific tool,
an equivalent product ma be used in
place of the recommended item.
All information, illustrations, and speci
fications contained in this Manual are
based on the latest product information
available at the time of publication ap
proval. The right is reserved to make
changes at an time without notice.
Printed in Canada
© 1985 General Motors Corporation November, 1985
SEC NAME
GENERAL INFORMATION
OA General Information
OB Maintenance and Lubrication
HEATING AND AIR CONDITIONING
1A Heating
1B Air Conditioning
FRAME AND CAB
2A Frame and Body Mount
2B Bumper
2C Sheet Metal and Fibergla
I
I
I
STEERING, SUS ENSION,
WHEELS AND TIRES
3A Front End Alignment
3B1 Steering Linkage
3B2 Manual Steering
3B3 Power Steering
3B4 Steering Column
3C Front Axle and Su pen ion
3D Rear Su pen ion
3E Wheel and Tire
I
RO ELLER SHAFT AND AXLES
4A Propeller Shaft
4B Rear Axle
4C Front Axle
BRAKES
ENGINE
6A Engine
6A3 4.3 Liter V6
6A4 4.8 Liter L6
6A5 Small Block
6A6 7.4 Liter V8
6A7 6.2 Liter Die el
6B Engine Cooling
6C Fuel Sy tem
6C1 Carburetor
6C2 Die el Fuel Injection
6D Engine Electrical
6E Drivability And Emi ion
6E8 Drivability And Emi ion — Carburetor
6E9 Drivability And Emi ion — Die el
6F Exhau t
6H Vacuum Pump
TRANSMISSION AND CLUTCH
7A Automatic Tran mi ion
7B Manual Tran mi ion
7B1 3 Speed 76mm Tran mi ion
7B2 4 Speed 89mm Tran mi ion
7B3 4 Speed 117mm Tran mi ion
7C Clutch
7D1 205 Tran fer Ca e
7D2 208 Tran fer Ca e
ELECTRICAL
8A Cab Electrical
8B Cha i Electrical
8C Intrument Panel
RADIO AND CRUISE CONTROL
9A Radio
9B Crui e Control
10 BODY
INDEX

H knows
quality parts
mak a diff r nc
v n on
simpl jobs.
Mr. Goodwrench wants you to have the right parts for
your truck—whether you see him for service or whether
you do the work yourself.
That’s why Mr. Goodwrench wants to have a good
stock of genuine GM Parts availa le. Everything from
exclusive GM Goodwrench replacement engines and
transmissions to GM Goodwrench Motor Oil that meets
or exceeds all specifications for General Motors cars
or light trucks. And Mr. Goodwrench has a complete
line of GM chemicals for fine care of your GM vehicle.
Plus accessories to add convenience—
or just a little extra style.
So keep that great GM feeling with genuine GM parts
at participating independent Mr. Goodwrench dealers
selling Chevrolets, Pontiacs, Oldsmo iles, Buicks,
Cadillacs, GMC and Chevy Trucks.
OCNERAL MOTORS CORPORATION
B-05884

O A -1
SECTION 0
GENERAL INFORMATION
CONTENTS
SUBJECT PAGE
General Information...................................................................................................................................................OA- 1
Maintenance and Lubrication..................................................................................................................................OB- 1
SECTION OA
GENERAL INFORMATION
CONTENTS
SUBJECT PAGE
Service arts Identification Label.......................................................................................................................OA- 2
Vehicle Identification late..................................................................................................................................OA- 2
Certification Label.................................................................................................................................................OA- 2
Model Reference.....................................................................................................................................................OA- 2
Engine Identification Number............................................................................................................................. OA- 2
Emergency Starting Due to a Discharged B attery.........................................................................................OA- 2
Graphic Sym bols...................................................................................................................................................OA- 6
Metric Fasteners..........................................................................................................................................................OA- 8
Fastener Strength Identification.........................................................................................................................OA- 8
revailing Torque Fasteners..................................................................................................................................OA-9
Six Lobed Socket Head Fasteners.......................................................................................................................OA-9
R O Listing (Regular roduction Option)............................................................................................................OA-14

OA-2 GENERAL INFORMATION
SERVICE PARTS IDENTIFICATION _________
V .I.N .M H H m A S E H H B H S E H H
________________ V I N VEHICLE IDENTIFICATION NUMBER _____________________
NOTF THE OPTIONAL -EQUIPMENT LISTED BELOW HAS BEEN INSTALLED ON THIS
VEHICLE FOR PROPER IDENTIFICATION OF REPLACEMENT PARTS BE
________SURE TO SPECIFY THE APPLICABLE OPTION NUMBERS______________________
IMPORTANT: RETAIN THIS LABEL AS A PERMANENT RECORD
B-07003
Figure 1—Service arts Identification Label
SERVICE PARTS
IDENTIFICATION LABEL
The Truck Service Parts Identification Label is
provided on all models (figure 1). It is located on the
inside of the glove box door (or on an inner bod panel
for Forward Control models). The Label lists the VIN
(Vehicle Identification Number), wheelbase, paint
information and all Production options or Special
Equipment on the vehicle when it was shipped from
the factor . ALWAYS REFER TO THIS INFORMATION
WHEN ORDERING PARTS.
VEHICLE IDENTIFICATION
NUMBER
The VIN is the legal identifier of the vehicle. On all
models except Forward Control, it is located on a plate
which is attached to the left top of the instrument panel
and can be seen through the windshield from the
outside of the vehicle (figure 2). On Forward Control
F-00687
Figure 2—VIN Location
models, the plate is on the dash and toe panel. To find
out the manufacturer, model and chasis t pe, engine
t pe, GVW range, model ear, plant code, and
sequential number, refer to figure 3.
CERTIFICATION LABEL
The Certification Label shows the GVWR, and the
front and rear GAWRs, and the Pa load Rating for our
vehicle (figure 4).
Gross Vehicle Weight (GVW) is the weight of the
orginall equipped vehicle and all items added to it
after it has left the factor . This would include bodies,
winches, booms, etc.; the driver and all occupants; and
the load the vehicle is carr ing. The GVW must not
exceed the GVWR. Also, the front and rear gross axle
weights must not exceed the front and rear GAWRs.
The Pa load Rating shown on the label is the
maximum allowable cargo load (including the weight of
the driver and all occupants) that the vehicle can carr
based on all factor installed equipment on the vehicle.
The Pa load Rating is reduced if an accessories or
other equipment is added to the vehicle after final date
of manufacture. The weight of these items should be
determined and deducted from the Pa load Rating.
The vehicle ma also have a GCWR (Gross
Combination Weight Rating). The GCW (Gross
Combination Weight) is the total weight of the loaded
tow vehicle (including passengers) and a loaded trailer.
The tires on the vehicle must be the proper size and
properl inflated for the load which ou are carr ing.
The vehicle Certification Label shows the originall
equipped tire size and recommended inflation
pressures. For more information on tires, refer to
WHEELS AND TIRES (Sec.3E).
MODEL REFERENCE
Refer to figures 5 and 6 to determine the vehicle
model. For C/K models, a “ C” is a two-wheel drive
vehicle and a “ K” is a four-wheel drive vehicle.
ENGINE IDENTIFICATION
NUMBER
Refer to figure 7 to determine the location of the
engine I.D. number.
EMERGENCY STARTING
YOUR VEHICLE DUE TO A
DISCHARGED BATTERY
If our vehicle will not start due to a discharged
batter , it can often be started b using energ from
another batter - a procedure called ‘‘jump starting.”

GENERAL INFORMATION OA-3
1
JX.
VEHICLE IDENTIFICATION
D C 1 4 N 4 G
Nation of Origin
1 - U.S. Built
2 = Canadian Built
3 = Mexican Built
Manufactur rs
G = General Motors
Cod Mak
AChevrolet Bus'
BChevrolet Incomplete
CChevrolet Truck
DGMC Incomplete
ECadillac Incomplete
HGM ot Canada Bus
TGMC Truck
OGMC Bus
5 GMC MPV
8Chevrolet MPV
'Van with 4th Seal
NUMBER
1 0 0 0 0 1
^ [Production^equence Nu ber^"
Cod S ri s
11/2 Ton
2 ^4 Ton
3 1 Ton
Cod Body Typ
0 Pickup/Panel Deliver
1 Hi-Cube/Cutawa Van
2 Forward Control
3 Four-Door Cab
4 Two-Door Cab
5 Van
6 Suburban
7 Motor Home Chassis
8 Utilit (Jimm /Blazer)
9 Stake
GVWR/BRAKE SYSTEM Lin and Chassis Typ
Cod GVWR Rang Brak Syst m Chassis
B3001-4000 H draulic Cod Lin Typ
C4001-5000 H draulic CConventional Cab 4 x2
D5001-6000 H draulic D Militar Truck 4 x4
E6001-7000 H draulic KConventional Cab 4 x 4
F7001-8000 H draulic GVan 4 x 2
G- 8001-9000 H draulic PForward Control 4 x 2
H 9,001-10,000 H draulic SSmall Conventional
J10,001 14.000 H draulic Cab 4 x 2
K 14,001-16,000 H draulic TSmall Conventional
'Includes G - Van Bus Cab 4 x 4
MSmall Van .4x2 .
Ass mbly Plant
Baltimore, MD
Flint, Ml
Janesville, Wl
St. Louis. MO
Pontiac, Ml
Oshawa, ON
Moraine, OH
Detroit, Ml
Scarborough, ON
Lordstown, OH
Shreveport, LA
Engin Typ and Mak
Cod Produc r Typ RPO
BChevrolet 2.8L V6 2BBL LR2
CDDAD 6.2L V8 Diesel LH6
EPontiac 2.5L L4 TBI LN8
FChevrolet 5.0L V8 4BBL LF3
HChevrolet 5.0L V8 4BBL LE9
JDDAD 6.2L V8 Diesel LL4
KChevrolet 5.7L V8 LPG LT9 & KL7
LChevrolet 5.7L V8 4BBL LS9
MChevrolet 5.7L V8 4BBL LT9
NChevrolet 4.3L V6 4BBL LB1
RChevrolet 2.8L V6 TBI LL2
TGM de Mexico 4.8L L6 1BBL L25
WChevrolet 7.4L V8 4BBL LE8
zChevrolet 4.3L V6 TBI LB4
F-00502
Figure 3—Vehicle Identification Number (VIN)
Should our vehicle have an optional diesel engine
with two batteries:
• P models and G Van models — use onl the
batter on the driver’s side when jump starting.
• C/K models — use onl the batter on the
passenger’s side when jump starting.
These batter locations are closer to the starter, thus
reducing electrical resistance. Ignore the second
batter .
NOTICE: Do not push or tow this vehicle to
start it. Under some conditions this may
dama e the catalytic converter or other parts
of the vehicle. Also, since this vehicle has a 12
volt battery, be sure the vehicle or equipment
used to jump start your en ine is also 12 volt.
Use of any other type system may dama e the
vehicle’s electrical components.
At low temperatures, it ma not be possible to start
our diesel engine from a single batter in another
vehicle. However, ou can use our vehicle to jump
start another vehicle.
MFD. BY GENERAL MOTORS CORPORATION
I A LL APPLICABLE FEDE
' SAFETY STANDARDS IN EFFECT
'M ANUFACTURE SHOWN ABOVE.
BOC100001 MPV
THU VENICLf EOUmO FOR 1000/453 LIS PAYLOAD
SEE OWNER’S MANUAL FOR ADDITIONAL INFORMATION
F-00597
Figure 4—Certification Label

OA-4 GENERAL INFORMATION
Chassis - Cab, Bonus/Crew Cab
Suburban
B-09177
Pickup, Regular Cab C-K MODELS Chassis - Cab, Regular Cab
Utilit Vehicle
Jimm (Blazer)
Pickup, Bonus/Crew Cab
Figure 5
JUM STARTING INSTRUCTIONS
CAUTION: Batteries produce explosive
gases, contain corrosive acid, and supply
levels of electrical current high enough to
cause burns. Therefore, to reduce the risk of
personal injury when working near a battery:
• Always shield your eyes and avoid
leaning over the battery whenever
possible.
• Do not expose the battery to open
flames or sparks.
• Be sure any batteries that have filler
caps are properly filled with fluid.
• Do not allow battery acid to contact
eyes of skin. Flush any contacted area
with water immediately and throughly,
and get medical help.
• Follow each step in the jump starting
instructions.
C-K Models
1. Position the vehicle with the good (charged)
batter so that the booster (jumper) cables will
reach, but never let the vehicles touch. Also, be
sure booster cables do not have loose or missing
insulation.
2. In both vehicles:
• Turn off the ignition and all lights and
accessories except the hazard flasher or
an lights needed for the work area.
• Appl the parking brake firml , and shift the
automatic transmission to Park (or manual
transmission to Neutral).
3. Making sure the cable clamps do not touch an
other metal parts, clamp one end of the first
booster cable to the positive ( + ) terminal on one
batter , and the other end to the positive terminal
on the other batter (figure 8). Never connect ( + )
to (-).

GENERAL INFORMATION OA-5
G VAN MODELS
RALLY (S ORTVAN) VANDURA (CHEVY VAN)
P MODELS
VALUE VAN (STE VAN)
(ALUMINUM) MOTOR HOME CHASSIS
MAGNAVAN (HI-CUBE VAN)
VALUE VAN (STE VAN)
(STEEL) FORWARD CONTROL CHASSIS
B-09178
CUTAWAY VAN
Figure 6—G Van and P Model

OA-6 GENERAL INFORMATION
1 2 L6 ENGINE
1. Engine I.D.
2. Distributor Pad
3. Engine I.D. (Optional Location)
4. Engine I.D. {0[
5. Engine Case F
6. Engine I.D.
• Jgj
Dtional Location)
l3d
V8 E N G IN E ^ A ^ ^ ^ ^
7. Engine I.D. V 4 ^ /
8. Engine Case Pad V6 ENGINE V8 ENGINES-DIESEL F-00527
Figure 7—Engine I.D. Number Location
4. Clamp one end of the second cable to the
negative (-) terminal of the good (charged) batter
and make the final connection to a heav metal
bracket (such as the mounting bracket for the
generator or air conditioner compressor if so
equipped) on the engine about 450 millimeters
(18 inches) from the discharged batter . Make
sure the cables are not on or near pulle s, fans,
or other parts that will move when the engine is
started.
5. Start the engine of the vehicle with the good
(charged) batter and run the engine at a
moderate speed for several minutes. Then, start
the engine of the vehicle that has the discharged
batter .
6. Remove the booster cables b reversing the
above installation sequence exactl . While
removing each clamp, take care it does not touch
an other metal while the other end remains
attached.
GRAPHIC SYMBOLS
Graphic s mbols are used on some controls and
displa s on the vehicle (figure 9). Man of these
s mbols are used internationall .
Make Connections in Numerical Order
First Jumper Cable
Do NOT Allow
V hicl s to Touchl Discharged
Battery
Second Jumper Cable
Make Last
Connection on
Engine or Frame,
Away from Battery
Battery in Vehicle
with Charged Battery I
A-9816 TD
Figure 8—Jump Starting Connection

GENERAL INFORMATION OA-7
(O)
BRAKE $
POWER TRAIN
OIL TEMPERATURE
1 • t I • 1 E3
WINDSHIELD
WASHER WINDSHIELD
WIPER & WASHER VENTILATING FAN WINDSHIELD
DEFROSTER
M - ABt & r >
REAR WINDOW
DEFOGGER FASTEN
SEAT BELTS FUEL ENGINE OIL
PRESSURE REAR WINDOW
WIPER & WASHER
ID
LPS
IDENTIFICATION
LAMPS
o
mu
A
LIGHTS OR
HIGH BEAM TURN SIGNALS HAZARD WARNING FLASHER
V
WINDSHIELD
WIPER
FOG LAMP SPEAKER
cao
BRAKE CAUSTIC
BATTERY ACID
COULD CAUSE BURNS
h r r
HORN
PARKING LIGHTS
An — i
CAUTION
POSSIBLE INJURY LIGHTER DOOR LOCK/UNLOCK
N> r »
CHOKE HEATER ENGINE COOLANT
TEMPERATURE
IIIUII
RADIO
SELECTOR
a
BATTERY
CHARGING
SYSTEM &
SEATBACK
WINGS IN/OUT
RADIO VOLUME
\\\W
D
HEADLIGHT
LOWER BEAM
\\|//
SPARK OR FLAME
COULD
EXPLODE BATTERY
ENGINE OIL
TEMPERATURE
kPa A
MANIFOLD TRANSMISSION
VACUUM OIL TEMPERATURE HOOD
RELEASE
F-00702
Figure 9—Graphic Symbol

OA-8 GENERAL INFORMATION
METRIC FASTENERS
1. Grade 2 (GM 200-M)
2. Grade 5 (GM 280-M)
3. Grade 7 (GM 290-M)
4. Grade 8 (GM 300-M)
5. Manufacturer’s Identification
6. Nut Strength Identification
7. Identification Marks (Posidriv Screw Head)
F-00695
Figure 10—Bolt and Nut Identification
Models are primaril dimensioned in the metric s s
tem. Man fasteners are metric and are ver close in
dimension to well-known customar fasteners in the
inch s stem. It is most important that replacement fas
teners be of the correct nominal diameter, thread pitch
and strength.
Original equipment metric fasteners (except
“ beaut ” bolts, such as exposed bumper bolts, and
cross recess head screws) are identified b a number
marking indicating the strength of the material in the
fastener as outlined later. Metric cross recess screws
are identified b a Posidriv or T pe 1A shown in figure
10. Either a Phillips head or T pe 1A cross recess
screwdriver can be used in Posidriv recess screw
heads, but T pe 1A cross recess screwdrivers will per
form better.
NOTICE: Most metric fasteners have a blue
color coatin . However, this should not be
used as positive identification as some fasten
ers are not color coated.
General Motors Engineering Standards, along with
other North American Industries, have adopted a por
tion of the standard metric fastener sizes defined b
1. Customar Bolt—1/4-20
2. Metric Bolt—M6.0x1
A. 1/4-inch
B. 6 mm
C. 20 Threads Per Inch
D. 1 Thread Per Millimeter
(25.4 Threads Per Inch) F-00705
Figure 11—Thread Notation
ISO (International Standards Organization). This was
done to reduce the number of fastener sizes used and
et retain the best strength qualities in each thread
size. For example, the customar 1/4-20 and 1/4-28
screws are replaced b the metric M6.0X1 screw which
has nearl the same diameter and has 25.4 threads per
inch. The thread pitch is in between the customar
coarse and fine thread pitches.
Metric and customar thread notation differ slightl .
The difference is shown in figure 11.
FASTENER STRENGTH
IDENTIFICATION
Most commonl used metric fastener strength
propert classes are 9.8 and 10.9 with the class
identification embossed on the head of each bolt.
Customar (inch) strength classes range from grade 2
to 8 with radial line identification embossed on each
bolt head. Markings correspond to two lines less than
the actual grade (i.e. grade 7 bolt will exhibit 5
embossed radial lines on the bolt head). Some metric

GENERAL INFORMATION OA-9
nuts will be marked with single digit strength
identification numbers on the nut face. Figure 10
shows the different strength markings.
When replacing metric fasteners, be careful to use
bolts and nuts of the same strength or greater than the
original fasteners (the same number marking or
higher). It is likewise important to select replacement
fasteners of the correct size. Correct replacement bolts
metric fasteners available in the aftermarket parts
channels were designed to metric standards of
countries other than the United States, and ma be of
a lower strength, ma not have the numbered head
marking s stem, and ma be of a different thread
pitch. The metric fasteners used on GM products are
designed to new, international standards that ma not
et be manufactured b some non-domestic bolt and
nut suppliers. In general, except for special
applicaitons, the common sizes and pitches are:
M6.0 x 1 M 10x1.5
M 8x1.25 M 12x1.75
SIX LOBED SOCKET
HEAD FASTENERS
Six lobed socket head (Torx) fasteners are used in
some applications on vehicles covered in this manual
(figure 13). The door striker bolt is of this design.
Tools designed for these fasteners are available
commerciall . However, in some cases, if the correct
tool is not available, a hex socket head wrench ma be
used.
PREVAILING TORQUE FASTENERS
A prevailing torque nut is designed to develop an
interference between the nut and bolt threads. This is
most often accomplished b distortion of the top of an
all-metal nut b using a n lon patch on the threads in
the middle of the hex flat. A n lon insert ma also be
used as a method of interference between nut and bolt
threads (figure 12).
A prevailing torque bolt is designed to develop an
interference between bolt and nut threads, or the
threads of a tapped hole. This is accomplished b
distorting some of the threads or b using a n lon
patch or adhesive (figure 12).
RECOMMENDATIONS FOR REUSE:
1. Clean, unrusted prevailing torque nuts and bolis
ma be reused as follows:
a. Clean dirt and other foreign material off the
nut or bolt.
b. Inspect the nut or bolt to insure there are no
cracks, elongation, or other signs of abuse
or overtightening. (If there is an doubt,
replace with a new prevailing torque
fastener or equal or greater strength).
c. Assemble the parts and hand start the nut
or bolt.
d. Observe that, before fastener seats, it
develops torque per the chart in figure 10 (if
there is an doubt, replace with a new
prevailing torque fastener of equal or
greater strength).
e. Tighten the fastener to the torque specified
in the appropriate section of this manual.
2. Bolts and nuts which are rust or damaged
should be replaced with new parts or equal or
greater strength.

0A-10 GENERAL INFORMATION
A
6 & 6.3 810 12 14 16 20
4,5 Nm 0.4 0.8 1.4 2.2 3.0 4.2 7.0
In. Lbs. 4.0 7.0 12 18 25 35 57
1,2, 3, 6,
7, 8, 9 Nm 0.4 0.6 1.2 1.6 2.4 3.4 5.6
In. Lbs. 4.0 5.0 10 14 20 28 46
B
.250 .312 .375 .437 .500 .562 .625 .750
4,5 Nm 0.4 0.6 1.4 1.8 2.4 3.2 4.2 6.2
In. Lbs. 4.0 5.0 12 15 20 27 35 51
1,2, 3, 6,
8, 9 Nm 0.4 0.6 1.0 1.4 1.8 2.6 3.4 5.2
In. Lbs. 4.0 5.0 9.0 12 15 22 28 43
A. Metric Sizes
B. Inch Sizes 1. Top Lock T pe
2. Center Lock
3. Dr Adhesive Coating
4. Out Of Round Thread
5. Deformed Thread Profile
6. N lon Strip Or Patch
7. N lon Washer Insert
8. N lon Patch
9. N lon Insert
B-02406
Figure 12—Torque Nuts and Bolts Chart

GENERAL INFORMATION OA-11
T - Internal Drive
E - External Drive
B-02221
Figure 13—Six Lobed Socket Head (Torx)
Fasteners

Conversion Table
CONVERSION TABLE
Multiply by to get equivalent number of: Multiply to get equivalent
by number of:
LENGTH ACCELERATION
Inch
Foot
Yard
Mile
25.4
0.304 8
0.9144
1.609
AREA
millimeters (mm)
meters (m)
meters
kilometers (km)
Foot/sec2
Inch/sec2 0.304 8 meter/sec2 (m/s2)
0.025 4 meter/sec2
TORQUE
Pound-inch
Pound-foot 0.112 98 newton-meters (N m)
1.355 8 newton-meters
OWER
Inch2 645.2
6.45
0.092 9
0.836 1
VOLUME
millimeters2 (mm2)
centimeters2 (cm2)
meters2 (m2)
meters2
Foot’
Yard2
Horsepower 0.746 kilowatts (kW)
RESSURE OR STRESS
Inches of water
Pounds/sq. in. 0.249 1 kilopascals (kPa)
6.895 kilopascals
ENERGY OR WORK
Inch3 16.387
16.387
0.0164
liters
3.785 4
0.764 6
MASS
mm1
cm3
liters (1)
liters
meters3 (m3)
Quart 0.946 4
Gallon
Yard3
BTU
Foot-pound
Kilowatt-hour
1 055 joules (J)
1.355 8 joules
3 600 000 joules (J * one W)
or 3.6 x 106
LIGHT
Pound
Ton 0.453 6
907.18 kilograms (kg)
kilograms (kg) Foot candle 1.076 4 lumens/meter2 (lm/m2)
FUEL ERFORMANCE
Ton 0.907
FORCE tonne (t) Miles/gal
Gal/mile 0.425 1 kilometers/liter (km/l)
2.352 7 liter/kilometer (l/km)
Kilogram 9.807 newtons (N) VELOCITY
Ounce
Pound 0.278 0 newtons Miles/hour 1.609 3 kilometers/hr. (km/h)
4.448 newtons
TEM ERATURE
Degree
Fahrenheit (t°F-32) 1.8 degree Celsius (C)
00
o
cn
co
-si
OA-12 GENERAL INFORMATION

GENERAL INFORMATION OA-13
DECIMAL AND METRIC EQUIVALENTS
Fractions Decimal Metric Fractions Decimal Metric
In. MM. In. MM.
1/64 .015625 .39688 33/64 .515625 13.09687
1/32 .03125 .79375 17/32 .53125 13.49375
3/64 .046875 1.19062 35/64 .546875 13.89062
1/16 .0625 1.58750 9/16 .5625 14.28750
5/64 .078125 1.98437 37/64 .578125 14.68437
3/32 .09375 2.38125 19/32 .59375 15.08125
7/64 .109375 2.77812 39/64 .609375 15.47812
1/8 .125 3.1750 5/8 .625 15.87500
9/64 .140625 3.57187 41/64 .640625 16.27187
5/32 .15625 3.96875 21/32 .65625 16.66875
11/64 .171875 4.36562 43/64 .671875 17.06562
3/16 .1875 4.76250 11/16 .6875 17.46250
13/64 .203125 5.15937 45/64 .703125 17.85937
7/32 .21875 5.55625 23/32 .71875 18.25625
15/64 .234375 5.95312 47/64 .734375 18.65312
1/4 .250 6.3500 3/4 .750 19.05000
17/64 .265625 6.74687 49/64 .765625 19.44687
9/32 .28125 7.14375 25/32 .78125 19.84375
19/64 .296875 7.54062 51/64 .796875 20.24062
5/16 .3125 7.93750 13/16 .8125 20.63750
21/64 .328125 8.33437 53/64 .828125 21.03437
11/32 .34375 8.73125 27/32 .84375 21.43125
23/64 .359375 9.12812 55/64 .859375 21.82812
3/8 .375 9.52500 7/8 .875 22.22500
25/64 .390625 9.92187 57/64 .890625 22.62187
13/32 .40625 10.31875 29/32 .90625 23.01875
27/64 .421875 10.71562 59/64 .921875 23.41562
7/16 .4375 11.11250 15/16 .9375 23.81250
29/64 .453125 11.50937 61/64 .953125 24.20937
15/32 .46875 11.90625 31.32 .96875 24.60625
31/64 .484375 12.30312 63/64 .984375 25.00312
1/2 .500 12.70000 11.00 25.40000
B-05496
Decimal and Metric Equivalents

OA-14 GENERAL INFORMATION
RPO LISTING
(REGULAR PRODUCTION OPTION)
The RPO list contains RPOs used on C-K Models, G
Vans, and Forward Control Chassis Models. Refer to
the Service Parts Identification Label for a list of the
RPOs used on each specific vehicle.
AA3 Windows - Deep Tint, Side Windows Onl
AC2 Window - Sliding, Right Front Door
AD5 Window - Right Rear, Side, Sliding
AD8 Door Check
AJ1 Window - Deep Tint, Except Windshield and
Doors
AM7 Seat - Right Rear Folding
AP7 Partition - Sliding Pl wood
AQ3 Seat - Rear Center
AQ4 Seat - Rear
AS1 Seat - Front Bucket, High Back, Driver
AS2 Seat - Front Bucket, High Back, Passenger
AS3 Seat - Right Rear, Suburban
AT5 Seat - Center Folding, Suburban
AU2 Lock - Cargo Door
AU3 Power Lock - Side Door
AU6 Power Lock - Tailgate Remote Control
AV5 Seat - High Back, Bucket
AW4 Door - Sliding Side Extension
AX5 Partition - Expanded Metal, Left Side
AX6 Partition - Expanded Metal w/Sliding Door
AX7 Partition - Expanded Metal w/Center Sliding Door
AX8 Seat - Front Bucket, Pedestal, Driver
AX9 Latch - Rear Cargo Door
A01 Window - Tinted, All Shaded Windshield
A02 Windshield - Tinted, Shaded Upper
A07 Window - Bod
A08 Window - Bod , Right Side
A12 Window - Stationar , Back Door
A13 Window - Stationar , Side Rear Door
A17 Window - Left Side Swing-Out
A18 Window - Rear Door, Swing-Out
A19 Glass - Side Rear Door, Swing-Out
A28 Window - Right Rear, Full Width, Sliding
A31 Window - Side, Power
A33 Window - Tailgate, Power
A51 Seat - Front Bucket
A52 Seat - Front Bench
A57 Seat - Auxiliar , One Passenger, Folding
A82 Head Restraints
A95 Seat - Front Bucket, High Back, Reclining
BA8 Compartment - Front Seat Storage
BB5 Ornamentation
BF3 Floor Covering - Step Well Mat
BW2 Ornamentation - Deluxe Bod Side Molding
B3D School Bus Equipment
B3J Diesel Equipment
B3M School Bus Equipment - Deluxe
B30 Floor Carpet
B32 Floor Mats - Front
B33 Floor Mats - Rear
B84 Extra Molding - Bod Side
B85 Extra Molding - Belt Reveal
B93 Extra Molding - Door Edge Guard
B96 Extra Molding - Wheel Opening
CD4 Wiper S stem - Pulse
C36 Heater - Auxiliar
C42 Heater - Deluxe Outside Air
C49 Defogger - Rear Window, Electric
C55 Vent - Roof
C56 Vent - Forced Air, Right Side
C60 Air Conditioning - Front Manual Controls
C69 Air Conditioner - Roof Mounted
C91 Lamp - Interior Courtes
DF1 Mirror - Camper T pe, Painted
DF2 Mirror - Camper T pe, SST
DG5 Mirror - West Coast T pe
D20 Sunshade - Windshield, Passenger Side
D31 Mirror - Tilt
D34 Mirror - Visor Vanit
D44 Mirror - Outside, Painted
D45 Mirror - Outside, SST
D46 Mirror - West Coast T pe with Clearance Lights
D49 Mirror - Chrome
D73 Pickup Box Hand Rail
D77 Mirror - Dual, Wide Angle, SST
D92 Stripe - Lower Decor
E24 Door - Cargo Side, Hinged
E31 Bod - Steel ,10 ft.
E32 Bod - Forward Control, Var. 3
E33 Bod - Forward Control, Var. 4
E34 Bod - Steel, 10 ft. Standard Width
E36 Bod - Aluminum, 10 ft.
E38 Bod - Steel, 12 ft. x 8 ft.
E39 Bod - Aluminum, 12 ft. x 8 ft.
E46 Door - 66 in., Overhead Sliding w/Window
E52 Door - 83 in., Wrap-Around
E53 Door - 87 in., Wrap-Around
E71 Cargo Floor - Steel
E76 Door - 60 in., Rear
E79 Door - 74 in., Rear, Strap Hinges
E62 Pickup Box - Stepside (Fenderside)
E94 Rall (Beauville) Equipment
E63 Pickup Box - Fleetside (Wideside)
E89 Panel - Driver Door w/Window
FS3 Axle - Front I-Beam
F51 Shock Absorbers - Front and Rear, Heav Dut
F58 Stabilizer Shaft - Front, Heav Dut
F59 Stabilizer Shaft - Front
F60 Spring - Front, Heav Dut
F66 Suspension S stem - Front
G50 Spring - Rear, Heav Dut

GENERAL INFORMATION OA-15
G51 Spring - Rear, Special Heav
G52 Spring - Rear 15000 lbs.
G60 Spring - Rear Auxiliar
G80 Axle - Rear, Limited Slip
KC4 Engine Oil Cooler S stem
KL7 Gas Conversion - LP
K05 Engine Block Heater
K09 Generator - 120 Amp
K22 Generator - 94 Amp
K34 Cruise Control
K46 Air Cleaner - Heav Dut , Pre-Cleaner
K81 Generator - 66 Amp
LB1 Engine - 4.3L V6 4BBL
LE8 Engine -4.7L V8 4BBL
LE9 Engine - 5.0L V8 4BBL, Hi Compression
LF3 Engine - 5.0 V8 4BBL, Regular Compression
LH6 Engine - 6.2L V8, Diesel
LL4 Engine - 6.2L V8, Heav Dut Diesel
LS9 Engine - 5.7L V8 4BBL
LT9 Engine - 5.7L V8 4BBL, Heav Dut
L25 Engine - 4.8L V6 1BBL
MV4 Transmission - Auto. 3-Speed Clutch Converter
MY6 Transmission - Manual 4-Speed w/Overdrive
NAS Emission S stem - Federal Requirements
NA6 Emission S stem - High Altitude Requirements
NE2 Fuel Tank - 40 gal.
NK7 Fuel Tank - 31 gal.
NL2 Fuel Tank - Auxiliar
NL7 Fuel Tank - 33 gal.
NM5 Emission s stem - Canadian Requirement
NN4 Fuel Tank - 60 gal.
NY1 Fuei Tank Shield
N05 Fuel Filler Cap Lock
N31 Steering Wheel - Custom
N33 Steering Column - Tilt
N40 Steering - Non-Variable
N41 Steering - Power
N51 Steering - Manual
N67 Wheel - Rall T pe
N90 Wheel - Aluminum Cast
PA1 Wheel - Trim Discs, Var. 5
PA6 Wheel - St led, Painted
P01 Wheel - Trim Discs, Var. 1
P10 Carrier - Spare Tire
P11 Carrier - Spare Tire, Glide Out
P13 Carrier - Spare Tire, Side-Mounted
P14 Carrier - Inside Mounted Spare Tire, Left Side
P15 Carrier - Inside Mounted Spare Tire, Right Side
P17 Cover - Spare Wheel/Tire
R05 Wheel Conversion - Dual Rear
TP2 Batter - Auxiliar Camper
TR9 Lamp Group
TT4 Headlamps - Halogen, Pencil Beam
TT5 Headlamps - Halogen
TVR Lamp - Rear Dome and Reading
T63 Headlamps - Warning S stem
T84 Headlamps - Right Rule
T85 Headlamps - Left Rule
UA1 Batter - High Capacit
UB4 Lamps - Rear Side Marker
UD4 Alarm - Vehicle Speed
UF2 Lamp - Cargo
UJ1 Indicator S stem, Brake Warning
UM6 Radio - AM/FM Stereo, Seek/Scan, Cassette,
Clock
UN3 Radio - AM/FM Stereo, Cassette
UY7 Wiring Harness - Truck Trailer, Heav Dut
U01 Lamp - Roof Marker
U18 Speedometer - Kilometer
U35 Electric Clock
U37 Cigarette Lighter
U58 Radio - AM/FM Stereo
U63 Radio - AM
U66 Speaker S stem - Dual Front, Dual Rear
U69 Radio - AM/FM
U76 Antenna - Windshield
VE5 Bumper - Front and Rear Impact Strip
VF1 Bumper - Rear Chrome
VR2 Trailer Hitch
VR4 Trailer Hitch - Weight Distributing
V01 Radiator - Heav Dut
V02 Radiator - Heav Dut w/Trans. Oil Cooler
V05 Increased Cooling
V22 Radiator Grille - Chrome
V31 Bumper Guards - Front, Chrome
V35 Bumper, Rear w/Recessed Lighting
V37 Bumper - Front and Rear Chrome
V42 Bumper - Rear Step, Chrome
V43 Bumper - Rear Step, Painted
V46 Bumper - Front, Chrome
V76 Front Hook Towing Device
X6W Hub - Locking
YE9 Equipment Package, Level 3
YG1 Molding, Bod Side and Wheel Opening
YJ6 Decor Package - Econo
ZM2 Trim Package, Bonaventure
ZW9 Base Bod or Chassis
ZY1 Color Combination - Solid
ZY2 Color Combination - Two Tone
ZY4 Color Combination - Deluxe Two Tone
Z53 Guage Package - Voltmeter, Oil Press, and Temp.
Z62 Equipment Package - Level 1
Z72 Trailering Package - L.D. Ball-T pe Hitch
Z73 Trim - Special Interior
Z75 Shock Absorbers - Four Front
Z76 Special Chassis - Camper Package
Z80 Trim - Special Exterior
Z81 Camper - Special
Z82 Trailer Hitch - Special Reese T pe
12A Stripe Accent - White
12K Color Combination - White (Auxiliar Top)
12L Secondar Color - White
12U Primar Color - White
18C Trim Combination - Charcoal, Stnd. Cloth
18D Trim Combination - Charcoal, Velour Cloth
181 Interior Trim - Charcoal