GM Accessories Tubular Assist Step Fastener Corrosion - keywords appearance bord bolt bracket corrosion running

This PI was superseded to update model years and part numbers. Please discard PIT3881.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Assist Step Service Fasteners (P/N 88963225, 16-pack) have been released for the "chrome" Colorado / Canyon Tubular Assist Steps. In particular, these fasteners should be used when servicing the following assist step packages:

Part Numbers

12498040 Tubular Assist Steps - Chrome Stainless Steel, Reg Cab

12498041 Tubular Assist Steps - Chrome Stainless Steel, Ext Cab

12498042 Tubular Assist Steps - Chrome Stainless Steel, Crew Cab

Assist Step Service Fasteners (P/N 19156385, 16-pack) have been released for the "brushed anodized aluminum" Colorado / Canyon Tubular Assist Steps. In particular, these fasteners should be used when servicing the following assist step packages:

Part Numbers

12498859 Tubular Assist Steps - Brushed Anodized Aluminum, Reg Cab

12498860 Tubular Assist Steps - Brushed Anodized Aluminum, Ext Cab

12498861 Tubular Assist Steps - Brushed Anodized Aluminum, Crew Cab

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.