really awful
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
88 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2011 GMC Sierra 3500 suspension problems

suspension problem

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2011 GMC Sierra 3500 Owner Comments

problem #1

Jan 232011

Sierra 3500 4WD 8-cyl

  • 88 miles


While driving a GMC 3500 denali hd 4X4 equipped with the diesel engine and automatic transmission, with less than 90 miles on it, the rear adjustment bracket for the left side torsion bar broke and fell off the vehicle while going over a speed bump at less than 20mph. More specifically, the part mounts near or in the crossmember brace and is used to adjust the preload on the torsion bar. After the part broke and fell off the vehicle had a noticeable list to the left side. The part is a cast part that appears to have failed in overload (underdesigned) or due to high stress concentrations (poor fit/tolerance issues). At city speeds I wouldn't expect much more than what happened to me. However, at highway speeds with a loaded truck or towing a trailer, the failure could result in control issues and therefore, in my opinion, should be classified as a safety issue. The dealer took the vehicle back and had a non-GMC facility "rebuild" the front suspension. According to the dealer, GMC has had at least one other similar incident. I currently have the broken part and possibly the original part from the right hand side of the vehicle.

- Homer, AK, USA

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