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.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the following components to the front assist step bracket, and the rear assist step bracket:
3.2. | The lock washers (2) |
Tighten
Torque the bolts to 90 N·m (66 lb ft).
- 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:
6.2. | The lock washers (2) |
6.3. | The body mount bolts (1) |
Tighten
Torque the bolts to 90 N·m (66 lb ft).
- Install (5) the assist step center bracket.
- Install (2) the following components to the assist step:
Tighten
Torque to 45 N·m (33 lb ft).
- Install (1) the following components to the assist step:
9.3. | The center body mount bolt |
Tighten
Torque to 90 N·m (66 lb ft).