Installation Procedure

Install the assist step support bracket to the vehicle.
Install the assist step support brackets 1 through 5 in the order which they were removed.

Fig 1: Assist Step Support Bracket Installing Order
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the bolts (2) that attach the assist step plate to the assist step support bracket to the underbody.
Tighten

Tighten the bolts (2) that attach the assist step plate to the assist step support bracket to the underbody to 25 N.m (18 lb ft).
Install the nuts and bolts (1) that attach the assist step brace to the assist step bracket
Tighten

Tighten the nuts and bolts (1) that attach the assist step brace to the assist step bracket to 10 N.m (89 lb in).

Fig 2: Installing Assist Step Brace To Assist Step Bracket
Courtesy of GENERAL MOTORS CORP.
Install the nuts that attach the assist step plate to the assist step support bracket.
Tighten

Tighten the nuts that attach the assist step plate to the assist step support bracket to 10 N.m. (89:1b in).
Lower the vehicle.

Fig 3: Installing Nuts Connecting Assist Step Plate To Assist Step Support Bracket
Courtesy of GENERAL MOTORS CORP.