Rattle Clunk Pop Contact Type Noise From Tubular Assist Steps - keywords accessory accessories body bolt bracket frame mount squeak suspension steer

This PI was updated to add model years and recommendations field. Please discard PIT3718A.

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

Rattle clunk pop contact type noise from tubular assist steps, VSE message.

Message # VSE20050149 - Date Released 09/16/2005

This message is a follow-up to the request that went out on 09/07/05 to quarantine all Silverado and Sierra Accessories Tubular Assist Steps (P/N 12498954 for Chrome and P/N 12498955 for Black). Reference Administrative Message VSE20050144.

An Assist Step Support Shim Package (P/N 19156225) is now available to resolve the rear assist step bracket-to-body mount frame pocket contact / noise issue identified on 2006 model year vehicles (with potential to occur on pre-2006 model year vehicles under certain driving conditions). This kit includes an install sheet, as well as two (2) shims that are to be installed with the rear assist step brackets.

Note: If installing the shim kit does not correct this concern of contact between the frame and assist step bracket proceed with the following repair:

Inspect the tubular assist step brackets for contact with the frame. Clearance should be at least 5 mm (5/16 in). If there is contact or a gap of less than 5 mm (5/16 in) between the bracket and the frame, grind the tubular assist step bracket to greater than 5 mm (5/16 in). After grinding, paint the exposed metal per GM 4901-M-D-2005 Approved Refinish Materials booklet.

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.