AMP Research PowerStep 77254-01A User manual

www.amp-research.com 1/11 IM77254 rev 02.18.19
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, 6:00 AM - 5:00 PM PST
5-Year Limited Warranty
WARRANTY
APPLICATION AMP Part#
Chevrolet Silverado 1500/GMC Sierra 1500 - Crew Cab 2019 77254-01A
Note: The application works only on the Crew Cab model Vehicles.

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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 Driver
4
Idler Linkage assembly
x2
5
Rail Assembly
x2
3
Motor Linkage
assembly Passenger

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
Socket Cap
Screw
13 x8
Cable tie (11”)
18 x2
Cable tie (7”)
17
x20
11
M5 Washer
x6 12 x4
M6 Flange Bolt
Upper Mount Spacer
16 x4
5/16-18
Carriage Bolt
14 x10
5/16-18 Flange nut
15 x10
6
Wire harness
7
Controller STA
8
Posi-Lock™
x2 9x20
M8 Hex Bolt w
Conical washer
10 x6
M5 Hex Bolt

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
19
LED Lamp
x4
23
Butt Connector
x8 24
OBD II Plug
20
LED Light Bracket
x4
27
Linkage Mounting
Bracket (Left)
x2 28
Linkage Mounting
Bracket (Right)
x2
25 x2
Gear Cover
26
Motor
x2
Nut Plates
21 x4
Button Head Bolt
22 x4
29
Rail Mounting Bracket
x2

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
16
12
Remove plastic body plugs in three locations shown. Using supplied M8 Conical washer bolts(9), Install
brackets(25,26,27) onto truck as shown. Bracket legs face each other. Rail support bracket located
between front and rear linkage mounts as shown. Do not tighten to allow for adjustment.
Slide 5 carriage bolts(14) into rail and position them in place to attach to brackets. Use provided ange nuts
to attach board to brackets. Insert threaded Nut Plate onto rail pocket, to attach light brackets into position
shown.
Thread supplied bolts 2x (9) into Rear Drive Linkage.
Repeat step for Front Idler Linkage. Do not tighten.
Install provided spacer (16) and M6 bolt (12) into
upper mount as shown on both the Drive and Idler
linkages. Do not tighten.
9
Note: Badge on rail sits towards the rear of the vehicle!
27 28
29
9
14
99
22
21
20
14
14
1
2
3 4

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
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 (9)
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 (15) to 16ft-lbs. Tighten mounting bracket hardware from step 1. Torque to 16ft-lbs
12
8
56
7

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
Attach motor to linkage. Using a 4mm hex Torque
to 36 in-Lbs. Remove the fuse from the Powerstep wire harness.
+
6
Attach wire harness to controller and
ensure locking tabs engage. Remove
the cover on the battery top box and
connect the Black wire to the battery
terminal accessory stud. Connect the
Red wire to the stud on the positive
power battery cable terminal.Secure
controller with supplied 11” cable Ties.
Route the long wire harness leg across the truck under the edge of the cowl (zip tied thru the push
rivet slots on the bottom), and then down to the outside of the frame away from the exhaust and
steering, cable tie(17) it in place. The other leg shall go down immediately away from the exhaust
and to the frame area. Cable tie as needed.
9
1
10
5
11
8

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
Using supplied butt connectors(23) , 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.
Afx LED lamp (19) to LED Bracket (20) 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
Route wire harness along the frame and back towards
rear linkages. Secure with zip ties. Push both wires
through rubber grommets. NOTE: Seal holes
with silicone glue
and cover with
tape so carpet
does not stick to
glue.
1
14
5
13
16
12
5
Remove the driver side door sill trim and and kick
panel carefully. Pull up the carpet, and poke a
small screwdriver through the rubber insulation
material.
13
15

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AMP RESEARCH POWERSTEPTM – CHEVROLET / GMC
Vehicle Port
Powerstep
Connection Module
Direct to Port Option
Powerstep
Control Module
To Vehicle
Power (12V)
To Powerstep
Motors
Powerstep
Control Module
To Vehicle
Power (12V)
To Powerstep
Motors
Powerstep
Connection Module
Vehicle Port
Pass-Through Harness Option
Vehicle Port
Pass-Through Harness
(pin-topin at each terminal)
New Vehicle Port
(replaces original port)
OBD II install: Use Supplied Posi Twist connectors to attach the Plug and Play Module to the
Harness. Attach matching colors on the harness to the wires on the module. Plug in module to
OBD II port on the vehicle. Secure harness with supplied tie wraps.
Note: If the OBD II pass thru harness (76404-01A) was purchased see install sheet supplied in packaging. The
pass through harness allows for an open port for other accessories. See next page for a brief description.
17