AMP Research PowerStep 77126-01A User manual

www.amp-research.com 1/11 IM77126 rev 01.21.20
INSTALLATION GUIDE
3-5 Hours
Professional installation recommended
Invented, engineered and manufactured exclusively by AMP Research in the USA. May be covered by one of the following patents:
6,641,158; 6,830,257; 6,834,875; 6,938,909; 7,055,839; 7,380,807; 7,398,985; 7,584,975 ©2012 AMP Research. All rights reserved.
Printed in USA.
TOOLS REQUIRED
qSafety goggles
qMeasuring tape
qPower Drill
q10 mm socket
q13 mm socket
q1/2” socket
qRatchet wrench and extension
qWire crimpers
qWire stripper / cutter
q 3/16” hex key wrench (allen wrench)
q4mm hex key wrench ( allen wrench )
qElectrical tape
qWeather proof caulking (silicone sealer)
qSilicone spray
INSTALLATION TIME
12 3 4
SKILL LEVEL
4= Experienced
AMP RESEARCH TECH SUPPORT 1-888-983-2204 (Press 2) Monday - Friday, 7:00 AM - 5:00 PM PST
APPLICATION AMP Part #
Chevrolet Silverado1500 / GMC Sierra 1500 - Crew Cab 2007-2013 77126-01A
5-Year Limited Warranty
WARRANTY
Chevrolet Silverado 2500/3500 - Crew Cab 2007-2014 77126-01A
GMC Sierra 2500/3500
Note:The application works only on the Crew Cab model Vehicles.
(Excludes all 2011-up models with Diesel Engine)

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
CAUTION: HANDLE WITH CARE.
To ensure our customers receive all components with full integrity, we pack the motors separate from their linkage
assemblies. This requires that the installer position and fasten the motor before continuing with the install. Please
follow the instructions below and handle the assembly carefully.
CAUTION: Dropping the assembly or any excessive impact MAY cause damage to the motor.
Instructions:
1. Position the gear cover in place as shown if not already in place.
2. Seat motor into position on the three mounting bosses. This may require an adjustment of the gear by moving the
swing arms.
3. After seating into place, fasten the motor with the three motor mount screws with 4mm Hex Head. Tighten screws
to 36 in-lbs (4N-m). Do not over torque.
INSTALLATION GUIDE
Attaching motor to Linkage assembly.
EXPLODED VIEW
• Motor
• Socket cap screw
• Washer
• Drive Gear Housing Cover

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
(A) End cap left (x1)
1x2
Running board assembly
D
B
(B) End cap right (x1)
(C) T-nut insert (x2)
(D) Socket cap screw (x2)
(E) End cap wedge right (x1)
(F) End cap wedge left (x1)
A
CE
F
Cut Dimension
2
Motor Linkage assembly
5
Wire harness
3
Idler Linkage assembly
x2 x2
6
Controller STA
7
Posi-Tap™
x4 8x20
M8 Hex Bolt w/
Conical washer
4
Rail Assembly
9x6
M8 Nut w/
Conical washer
x2

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
Socket Cap
Screw
14 x8
Grommet
18
Cable tie (11”)
20 x2
Cable tie (7”)
19
x20
21
LED Lamp
x4
13 x6
M8 U-nut
11
M5 Washer
x6
10 x6
M5 Hex Bolt
22
Butt Connector
x8
12 x4
M6 Flange Bolt
Upper Mount
Spacer
17 x4
23
LED Light Bracket
x4
5/16-18
Carriage Bolt
15 x10
5/16-18
Flange nut
16 x10
27
Linkage Mounting
Bracket
x4 28
Rail Mounting
Bracket
x2 29 x2
Gear Cover
30 x2
Motor
26
Tubing
(installation tool)
24
Nut Plates
x4 25
Button Head
Bolts
x4

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
28 27
27
8.50
37.45
61.25
NOTE: 2500/3500HD Models-Rear mount on passenger side of vehicle will need to be moved
forward from last mounting hole to second to last hole. Approx 15-1/4”.
Insert and position Carriage bolts (15) into slot on rail (4). Insert from either end of rail. Using Flange Nuts
(12) provided assemble Brackets 2x (27) & 1x (28) onto the rail (4). Driver side shown. Dimensions shown
are for reference. Insert Threaded nut plate onto rail pocket. Light brackets will need to go rearward of Front
linkage bracket and forward of Rear linkage bracket. Leave loose to allow for adjustment.
Do not tighten this will allow for rail adjustment when mounted onto vehicle. See note below for HD models.
Insert U-Nut in last sheetmetal tab / hole from front. Set rail up into position. Starting with the rear bracket
work towards the two front brackets. Attach Bolts
2x (8) and Nut 1x (9). Snug to body do not tighten!
Note: Forward and middle bracket may not need nut if threaded
insert is present.
Thread supplied bolts 2x (8) into Rear Drive Linkage.
Repeat step for Front Idler Linkage. Do not tighten.
Install provided spacer (17) and M6 bolt (12) into
upper mount as shown on both the Drive and Idler
linkages. Do not tighten.
Rear Of Vehicle Front Of Vehicle
Rear of vehicle
Install U Nut (9)
8
9
8
8
17
12
Note: Badge on rail sits towards the rear of the vehicle!
1
23
4 5
25
24
23

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
16
16
16
B
B
B
A
A
A
Slide mounting T-nut into position, Center board in
rail pocket. Tighten fasteners to 10 ft-lbs.
Using a 13mm socket Torque linkage bolts 4x (8)
from step 5 to 16 ft-lbs Next use a 10mm socket,
torque linkage spacer bolt 2x (12) from step 6 to 8
ft-lbs.
Verify rail clearance at front fender trim and push upwards on rail to ensure rail is snug to the bottom of the
linkage mounting bracket. Using a 1/2” socket start at the rear of vehicle and work forward. Torque 5 ange
nuts (16) to 16ft-lbs.
A: Using a 13mm socket tighten 3 bolts along pinch weld rst. Torque to 16ft-lbs.
B: Next torque 3 upper sill bolts to 16ft-lbs.
12
8
67
8
9

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
Using the two 11” cable ties, mount controller to
support arm next to battery. (Behind support arm on
diesel engine) On Hybrid models: Mount controller
on drivers side of engine compartment.
Plug in wire harness.
(Ensure that locking tabs engage.)
4
Remove power fuse. Attach power lead (RED wire)
to positive pole on the battery.
CAUTION: Do not ground wrench when engaged
with nut.
Attach ground lead to negative battery pole.
GAS ENGINE WIRE ROUTING
Route long end of wire harness above engine and
down through drivers side wheel well. Zip tie harness
to cowling clips on re wall. Route short end down
passengers side. On Hybrid models: Long end of
wires will be routed down through passenger side
Secure with zip ties.
4
DIESEL ENGINE WIRE ROUTING
Route long end of wire harness under intake and
along factory engine harness to driver side wheel
well. Route short end down passengers side.
Secure with zip ties.
5
5
5
19
11
1
12
5
13
14
10
Pop off the threshold cover with screwdriver and
remove the kick panel. Repeat step on passenger
side.
Route wire harness along the frame and back towards
rear linkage. Secure with zip ties. Poke hole through
rubber grommet near front door on underside of oor
panel with small phillips screwdriver. Push both wires
through hole.
4
5
15
5

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
17
1
18
5
19
20
16
21
5
Pull up the carpet and thread both wires through the
oor panel (same steps on passenger side EXCEPT
drill 9/32” hole in metal and add rubber grommet).
Seal holes with silicone glue and cover with
tape so carpet does not stick to glue.
REAR DOORS - Carefully remove wire wrap and
nd LIGHT BLUE wire with BLACK STRIPE. On
passenger side nd GREEN wire with BLACK
STRIPE. The wire is located rear of the “T” junction
where wires cross under the front seat.
20
4
REAR DOORS - Using supplied Posi-Tap™
connector, splice shorter trigger wire into wire found
in Step 16. Otherwise tape off short wire.
Location of Body
Control Module
For model years 2007-2010 locate and inspect the
Body Control Module above the brake pedal under
the dashboard. The BCM is the only module with a
pink connector. Check to see if the front door ajar
signal wires are present in the pink connector: Grey/
Black, Tan/White. If you do not see these wires the
front door panels must be removed.
Vehicles that do not have the front door ajar
signal wires in the pink connector of the
BCM must have the front door panels re-
moved in order to access the front door ajar
signal wires. For these and all Hybrid
models Go to step 22.
Remove driver side kick panel and open the loom wrapped
in grey or black tape to access the Grey / Black stripe wire.
In the passenger side kick panel the loom wrapped in green
or black tape will have a Tan / White stripe wire. Connect
Power Step Grey / Black and Tan / White wires to like
colored factory wires.

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
55
23
23
1
24
5
25
26
22
27
Remove plastic trim on door near mirror attachment.
Then carefully pry up window/ door lock switch plate.
Remove all plugs from switchplate
To remove door panel, rst pry back tab on door
lock to remove then pry off plastic covers by handle
and door latch. Remove the 3 door bolts and
then remove door panel by prying loose all panel
fasteners.
Feed longer wire of Step 13 through tube into door
and pull out plastic tube on door side. Route wire
along harness to switchplate.
Pull back the door weather guard, unbolt speaker
and unplug. Thread plastic tube through accordion.
Remove door latch cable from door panel.
23

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
Using supplied butt connectors, connect the lamp
wires. Red to Red, Black to Black. Once Crimped use
heat gun to shrink tube. Close and wrap conduit with
electrical tape. Secure all loose wires with cable ties.
Pull lamp wires upward to avoid any wire snagging.
Attach motor to harness using a 4mm Hex Torque to 36
in-lbs. Connect harness to motor. Secure harness with
tie wraps.
7
5
Afx LED lamp (21) to LED Bracket (23)
as shown..
Afx LED light bracket assembly to rail. Mount front
light rearward of front linkage and mount rear light
just forward of rear linkage.
5
For 2007-2009 Models:
Locate the brown plug in doors and using supplied
Posi-Tap™ connector, splice into trigger wire.
Drivers side: Grey / Black wire
Passengers side: Tan / White wire
Note: On Hybrid models trigger wire colors will not
match up because wire harness is ipped.
29
1
30
5
31
32
28
33
Brown plug
Reassemble door and replace plugs. Plugs
must be replaced for Power Step to operate.
For 2010-Current models:
Locate loom that runs across the top of the door
panel. Carefully remove wire wrap and locate the
following wires on either side. Drivers side: Grey
/ Black wire Passenger side: Tan / White wire
Caution: Zip tie trigger wires to avoid being hung up
in window linkage.
Note: On Hybrid models trigger wire colors will
not match up because wire harness is ipped.