GMC Sierra problems
Light NHTSA footprint — 42 owner complaints. Either a clean record or thin data; we'll show what's there.
Solid reliability overall. Common issues are concentrated in a few systems.
Buyable on the data — keep up the usual maintenance and inspect normally.
- No systemic severe-failure pattern in the complaint record
- Reliability score 8.2/10 — above the segment average
Our read of the federal NHTSA complaint and recall record for this exact year and model — not a substitute for a pre-purchase inspection. How we score.
Top trouble spots 4 categories with 3+ complaints
What owners are saying recent NHTSA-filed complaints · verbatim
Tl* the contact owns a 2012 GMC sierra. The contact stated that the vehicle experienced a loss of power which resulted in a front end collision with a guardrail. When the failure occurred, all the warning indicators illuminated. The vehicle was able to be operated after the…
Engine will increase idle from 700 to 900 at any time. One can be sitting at a traffic light and it might increase or decrease. I pull a 5th wheel (35 feet) and it is very difficult to stop with the engine trying to keep going. Also it is very scary to stop on slippery roads.…
I have goodyear wrangler sr-a 265 60r20 tires on my sierra denali hd 2500. I was on the way back from nc via I-95 and pulled over so my wife could nurse our 3 week old. Me and the boys went in k-mart for a few minutes. Upon returning and getting back on the road, I noticed my…
Loss of steering control (three episodes) : 13 nov 2012, while exiting nb I-95 onto eb route 214 in landover, md, my steering wheel locked. My speed at the time was approximately 50 MPH. I was able to brake rapidly as the ramp began to straighten from it's sweeping right…
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
Common questions
Is the 2012 GMC Sierra reliable?
Mostly yes. With a reliability score of 8.2 out of 10 based on 42 owner complaints filed with NHTSA, the 2012 GMC Sierra is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2012 GMC Sierra?
On the NHTSA data, the 2012 GMC Sierra does not need avoiding. Buyable on the data — keep up the usual maintenance and inspect normally. The record behind that call: No systemic severe-failure pattern in the complaint record; Reliability score 8.2/10 — above the segment average. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What's the most common problem on the 2012 GMC Sierra?
Based on NHTSA records, the most-reported issue is electrical, with 7 complaints filed. Typical failure occurs around 59,581 miles. Average repair cost runs about $850 at an independent shop.
What's the most expensive thing that goes wrong?
The electrical is one of the costlier repair items. Average repair cost runs about $850 at an independent shop. Typical failure occurs around 59,581 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my GMC Sierra has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2012 GMC Sierra?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 42 complaints on file and the costliest repair averaging $850, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.