Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Important: Apply thread locker GM P/N 12345382 to all bolt threads prior to assembly.

Install the front gaskets, and the rear gaskets (5) to the assist step.
Install the front brackets, and the rear brackets (4) to the assist step.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the following components to the front assist step bracket, and the rear assist step bracket:
1. 3.1. The washers (3)
2. 3.2. The lock washers (2)
3. 3.3. The bolts (1)
  Tighten
  
  Torque the bolts to 90 N.m (66 lb ft).
  
  Fig 1: Installing Front Brackets And Rear Brackets
  Courtesy of GENERAL MOTORS CORP.
Install the lower body-mount cushion assemblies (4), front and rear, to the vehicle.
With an assistant, raise the assist step to the vehicle.
With an assistant, install the following front components, and rear components:
1. 6.1. The washers (3)
2. 6.2. The lock washers (2)
3. 6.3. The body mount bolts (1)
  Tighten
  
  Torque the bolts to 90 N.m (66 lb ft).
  
  Fig 2: Installing Lower Body-Mount Cushion Assemblies
  Courtesy of GENERAL MOTORS CORP.
Install (5) the assist step center bracket.
Install (2) the following components to the assist step:
1. 8.1. The washer
2. 8.2. The lock washer
3. 8.3. The center bolt
  Tighten
  
  Torque to 45 N.m (33 lb ft).
Install (1) the following components to the assist step:
1. 9.1. The washer
2. 9.2. The lock washer
3. 9.3. The center body mount bolt
  Tighten
  
  Torque to 90 N.m (66 lb ft).
  
  Fig 3: Installing Assist Step Center Bracket
  Courtesy of GENERAL MOTORS CORP.