Cadillac Cadillac 1973 Install guide

1 973 CADILLAC
SHOP MANUAL
ALL
SERIES
IMPORTANT SAFETY NOTICE
Proper service and repair is important to the safe, reliable operation of all
motor vehicles. The service procedures recommended by Cadillac and
described inthis service manual are effective methods for performing service
operations. Some of these service operationsrequirethe use oftools specially
designed for the purpose. The special tools should be used when and as
recommended.
It is important to note that some warnings against the use of specific service
methods that can damage the vehicle or render
it unsafe are stated in this
service manual.
It is also important to understand these warnings are not
exhaustive. Cadillac could not possibly know, evaluate and advise theservice
trade of all conceivable ways inwhich service might bedoneor of the possible
hazardous consequences of each way. Consequently, Cadillac has not under-
taken any such broad evaluation. Accordingly, anyone who uses a service
procedure or tool which is not recommended by Cadillac must first satisfy
himself thoroughly that neither his safety nor vehicle safety will be
jeopardized
by theservice method heselects.

1 973
CADILLAC
SHOP
MANUAL
Service information pertaining to features exclusive to the
Eldorado is provided at the back of the individual sections in
this manual. All other service information for the Eldorado is
the same as that described in the forward portion of the
individual sections.
Ail information, illustrations, and specificationscontained in
this manual are based on the latest product information
available at the time of publication approval. The right is
reservedto make changes at any time without notice.
Service Department
CADILLAC MOTOR CAR DIVISION
General Motors Corporation
Detroit, Michigan 48232
Printed in U.S.A. 9-72
@ General Motors Corporation 1972
Part No. 109 9635
SECTION NO. P,
1
mi
Cruise Control
e
16
26
Twilight Sentinel 32
Rear Window De-Fogger 39
Lamp Monitor System 41
Low Washer Fluid System
I 44
45
ii

THE CADILLAC CERTIFIED CRAFTSMAN'S LEAGUE
CADILLAC CRAFTSMAN CODE
HEREBY pledge myself in all my work on
Cadillac cars, to be thorough and exact in diag-
nosing trouble; to recommend only that service
which is to the best interest ofthe owner;to perform
that work for which
I am responsible in accordance
with Cadillac standards to the best ofmy ability,and
in all my dealings with Cadillac owners, to be cour-
teous, honest, and ethical; and to do everything
within my power to further the owner's satisfaction
and promote his good will to Caaillac and to my
dealer.
The Cadillac Certified Craftsman's League is a program sponsored by Cadillac Motor Car Division
for the benefit of authorized dealer's service departments. Participation in the League is open to
Cadillac servicemen and partsmen, including department managers and apprentices. Enrollment
information is available from the Zone Service Representative.

GENERAL INFORMATION, MAINTENANCE AND LUBRICATION 0-1
GENERAL INFORMATION, MAINTENANCE AND LUBRICATION
Foreword
This Shop Manual has been prepared by the Service
Department of the Cadillac Motor Car Division toaid in
servicing 1973 model Cadillac automobiles. It is in-
tended primarily for servicemen who are familiar with
earlier model Cadillacs. It includes complete information
on service procedures and specifications pertaining to all
1973 Cadillac cars except body service information
which is covered in a separate manual. Refer to the body
service manual for servicing Cadillac body items.
Arrangement of the Manual
The title page contains a rapid reference section
index with headings corresponding to the page tabs at
the beginning of each section. A Table of Contents is
provided at the beginning of each section that contains
more than one major subject. A complete alphabetical
index is located at the back of the manual. The section
sequence used in this manual has been arranged to con-
form with the ShopManuals of other
GM car lines.
The individual sections include theory of operation
and diagnosis at the beginning of each section followed
by service adjustments and replacement procedures. An
illustrated list of special tools, a torque requirement
chart, and specifications are provided at the end of each
section.
Service information pertaining only to those features
that are exclusive to the Eldorado is provided at the
back of the individual sections in the manual. For
Eldorado service procedures and recommendations not
listed, refer to the forward part of the appropriate
section, as these service procedures are similar to those
on other 1973Cadillac cars.
GENERAL INFORMATION
Vehicle Identification Number
identification number is decoded as follows:
The last six digits of the number determine the se-
Each 1973 Cadillac automobile or Commercial quence in which the car was built. These numbers are
Chassis carries a 13-digit vehicle identification number utilized as follows:
used for license and insurance identification and in
general reference to the automobile. The number is 100001through 350000
- Detroit built "C" bodies
located on the forward lower edge of the windshield 350001 through 400000
- Linden built DeVille
trim molding at the driver's side of the car where it is series
visible through the windshield. The 1973Cadillac vehicle 400001 through 450000
- Detroit built "E" bodies
I -
Car Line Series
C
c4 R ] looGi
1 6 denotes Cadillac
Division
- -
Sequence in which car
was built.
Plant designation
Q - Detroit
E - Linden
Model Year (1973)
Engine Designation
R - 472 Cu. In.
S - 500Cu. In.

0-2 GENERAL INFORMATION. MAINTENANCE AND LUBRICATION
ENGINE UNlT NUMBER ON
BLOCK BEHIND LEFT CYLINDER
HEAD; V.I.N. DERIVATIVE ON
BLOCK BEHIND INTAKE MANIFOLD
TURBO HYDRAMATIC TRANSMISSION
UNlT NUMBER PLATE LOCATED
ON
RIGHT SIDE OF CASE (EXCEPT 6L)
GUIDE-MATIC PHOTOCELL AND AM-
PLIFIER SERIAL NUMBER LABEL LO-
CATED ON BACK OF UNlT
ViHlCLF 1l)l PNII CATION NUMBER
LOCATED ON PLATE RIVETED TO
COWL BAR IN THE LOWER LEFT
HAND CORNER OF THE WINDSHIELD.
VEHICLE IDtNTIfICATION NUMRtR
DERIVATIVE LOCATED ON LEFT
SlDE OF TRANSMISSION CASE
(EXCEPT 6L)
A C COMPRESSOR SERIAL NUMBER
LABEL LOCATED ON REAR PORTION
OF COMPRESSOR HOUSING.
TURBO HYDKA MATlC TRANSMIS-
SION UNlT NUMBER PLATE LOCAT-
ED
ON LEFT S DE OF COlvVERTER
hOUSlNG.VEH C.E IDElvTIFICATION
NUMBER DERIVATIVE LOCATED ON
VERTICAL SUPPORT PAD ON LEFT
OF TRANSMISSION (6L ONLY)
- -
-- -
TWLICIHT '>IPJIINI I AMPLFltR ',I i'AL
NUMBER LAREL LOCATED ON COVFR
OF UNlT
RADIO SERIAL NUMRER TAG LOCATED
ON RIGHT SlDE
OF TUNER
Fig. 0-1 Unit Number Location
-- -
- ~~ ~
.. -~

GENERAL INFORMATION, MAINTENANCE AND LUBRICATION 0-3
The series and model section (2nd, 3rd, and 4th
digits) of the vehicle identification number may be
further decoded using the above chart. These two body
style numbers are interchangeable when referring to the
automobile.
A nine-digit derivative of the vehicle identification
number is applied to the engine and transmission at the
locations shown in Fig. 0-1. This derivative is used for
in-plant control of these Assemblies and may be used by
law enforcement or other officials to identify proper
enginechassis combinations. This number should con-
tain the same numbers and letters as the vehicle identifi-
cation number but in the condensed form shown below.
6 3
Q 100001
Sequence in which car
was built
Plant
Q - Detroit
E - Linden
Model Year (1973)
6 denotes Cadillac Division
\
V.I. BODY STYLES
6C47
6C49
6D47
6D49
6B69
6F23
6F33
6L47
,$L67
6290
MODEL NAME
Calais Coupe
Calais Sedan
Coupe DeVille
Sedan DeVille
Fleetwood Sixty Special Brougham
Fleetwood Seventy-Five Sedan
Fleetwood Seventy-Five Limousine
Eldorado coupe
Eldorado Convertible
Commercial Chassis
I
Identification Numbers
PARTS AND FLAT RATE
MANUAL BODY STYLE
6CC47
6CC49
6CD47
6CD49
6CB69
6DF23
6DF33
6EL47
6EL67
62290
Locations of identification numbers on various units
are shown in Fig. 0-1. The identification number on the
unit should always appear on product report forms sent
to the Central Office such as PIR's, Claim Tags, Pre-
I Delivery Reports and, when required, on Warranty
I
Claims. The 13 digit Vehicle Identification Number is
necessary when reporting product information on any
vehicle.
t
Body Name Plate
A body name plate, Fig. 0-2, is attached to the top
surface of the shroud on the right side, under the hood,
near the cowl. The name plate carries the style number,
trim number, body number, and paint number in the
areas indicated by ST, TR, BODY, and PAINT.
The first two digits of the style number (ST) indicate
the model year while the remaining five digits indicate
the body style.
The numbers following
TR indicate the interior trim
color and seat type.
The body number consists of three letters indicating
the assembly plant and six digits indicating the sequence
in which the body was built.
The first two digits of the paint number indicate
color of thebody shell and chassis sheet metal; the letter
indicates color of convertible and vinyl tops.
The number-letter code at the left below trim indi-
catesdate of assembly (month-week).
/ BODY BY FISHER \
ST 73-6CD47 FWD 123456 BDY
TR 351 11-K PNT
oooO
GENERAL MOTORS CORPORATION
0
CERTIFIES TO THE DEALER THAT THIS
VEHICLE CONFORMS TO ALL U.S. FEDERAL
MOTOR VEHICLE SAFETY STANDARDS
APPLICABLE AT TIME OF MANUFACTURE
1
Fig. 0-2 Body Name Plate

0-4 GENERAL INFORMATION, MAINTENANCE AND LUBRICATION
GENERAL DESCRIPTION AND SPECIFICATIONS
Hoist Recommendations
(Except Eldorado)
CAUTION: Failrrrr to follow the recommenda-
tions orrtlined below ma)' reszrlt in unsatisfactory
vehicle performance, or a durability failure which
may result in loss of control of the vehicle.
Description
Fleetwood Sixty Special
Brougham
Calais Sedan
Calais Coupe
Sedan de Ville
Coupe de Ville
Eldorado Coupe
Eldorado Convertible
Fleetwood Seventy-Five
The preferred type of hoist for lifting 1973Cadillacs
is one that engages the front suspension and rear axle, or
all four wheels.
The front lower suspension arm is designed with a
flattened portion on the flange of the arm for use with
lifting equipment that engages the suspension system.
When using lifting equipment of this type, make certain
that the car is properly centered over the hoist and that
the hoist arms are positioned under the flattened portion
of the flange, Fig. 0.3, outboard of the safety locaters. If
the hoist arms are not properly positioned in relation to
the lower support arms, damage to the steering linkage
or brake lines could result, or the car may shift on the
hoist.
Overall
Length
(Inches)
231.5
228.5
228.5
228.5
228.5
222.0
222.0
250.0
250.0
253.9
CAUTION: The rear lower control arms should
never be used asa liftpoint.
Vehicle
Identifi-
cation
Number
6869
6C49
6C47
6D49
6D47
6L47
6L67
If a frameengaging hoist is used, certain precautions
must be observed. The shaded areas of the frame, Fig.
04,indicate the only acceptable positions for lift pads.
Pads must be used in these areas with maximum surface
contact and must contact only those parts of the frame
indicated.
Overall
Height
(Inches)
55.5
54.6
54.1
54.6
54.1
53.9
54.3
57.8
57.7
-
Sedan
Fleetwood Seventy-Five
Limousine
Commercial Chassis 6290
(NOTE: Certain cars are equipped at these loca-
tions with special brackets used for rail shipment. If such
a situation is encountered, be sure to engage bracket
fully rather than at the edges.)
151.5
151.5
157.5
WEIGHT
4999
4850
4797
4882
4822
4777
4863
Do not use a frame-engaging hoist to raise the Fleet-
wood Seventy-Five Sedan and Limousine or the Com-
mercial Chassis.
Maxi-
mum
Width
(Inches)
79.8
79.8
79.8
79.8
79.8
79.8
79.8
79.8
79.8
-
Wheel-
base
(Inches)
133.0
130.0
130.0
130.0
130.0
126.3
126.3
CAUTION: The shock absorbers act as rebound
stops for the rear suspension Under no circum-
stances should the rear end ofcar be raised so that
rrar suspension is in rebound position while dis.
connecting shock absorbers.
Hoist Recommendations
(Eldorado Only)
Tread
Width
CAUTION: Failure to follow the recommenda-
Front
63.3
63.3
63.3
63.3
63.3
63.66
63.66
63.3
63.3
63.3
tions outlined below mav result in unsatisfactory
vehicle performance, or a durability failure which
may result in loss of control of the vehicle.
Rear
63.3
63.3
63.3
63.3
63.3
63.59
63.59
63.3
63.3
65.0
The preferred type of hoist for lifting the 1973
Eldorado is one that engages the front suspension and
rear axle or all fourwheels.
Use of a suspension-engaging hoist requires that
certain procedures bc observed.
Be sure front hoist saddle adapters engage lower
suspension arm just inboard of stabilizer linkage (both
sides), Fig. 0-5, to prevent damage to steering linkage. At
the rear, Fig. 0-6, place "saddles" of hoist in maximum
"in" ~ositionto prevent dama~eto Automatic Level
contrb~overtravei lever bracket, fuel lines, and brake
Fig.
0-3 Front Hoist Saddle Position-Except Eldorado lines.
-~ ~~ ~
~ -~~~
. -
- --

GENERAL INFORMATION, MAINTENANCE AND LUBRICATION 0-5
5 FRONT WHEELS
FRONT BOTTOM
CORNER OF DOOR
ON
CLEARANCE
7.90
Fig. 0-4 Lifting Locations-Except Eldorado and Commercial Chassis
Fig.
0-5 Front Hoist Saddle Position-Eldorado Fig.
0-6 Rear Hoist Saddle Position-Eldorado
W' - ~ ~

0-6 GENERAL INFORMATION, MAINTENANCE AND LUBRICATION
1
Fig. 0-7 Lifting Locations-Eldorado
CAUTION: The rear lower control arm should
a situation is encountered, be sure to engage bracket
never be used as a lift point.
fully rather than at the edges.)
If a frame engaging hoist is used, certain precautions An additional precaution of using two floor stands
must also be observed. under the front frame cross member of the Eldorado is
Make sure that hoist adapters and "tabs" are in recommended when heavy mechanical operations are to
lowered position before driving on or off the lift. be performed. Be sure to remove these stands before
attemptingto lower the vehicle.
Position hoist adapter "tabs" in raised position to If a drive-on hoist is used, be sure the center line
obtain maximum possible height between frame and
relationship as stated above is also applied,Fig. 0-7.
hoist. When supporting the Eldorado with a floor jack or
Be sure to position tabs in exact locations jack stands, the supports should be placed at the sus.
shown in the shaded areas of Fig. 0-7 and make
the
pendon lift points or the frame contact lift points. The
centerline of the door is behind the centerline of the lift ~ld~~~d~should
never be Npported at the extreme ends
post for proper weight distribution. of the frame or at the center of the frame side rail or
(NOTE: Certain cars are equipped at these loca- lifted at the front or rear bumper with anything other
tionswith specialbrackets used for rail shipment. If such than the bumper jack provided with the car.