Table 1 shows seven common engine and engine cooling related problems of the 2015 GMC Sierra 1500. The number one most common problem is related to the engine and engine cooling (65 problems). The second most common problem is related to the radiator (eight problems).
In August, 2019, at 93,672 miles, gm covered a lifter failure on our 2015 GMC sierra, v8 afm engine. Only the left side was repaired. Now, in 2026 at 130,000, the right side has the same issue and needs repair. The estimate to repair is $16,697. This is a known issue and a safety concern. Read details...
Radiator forms stress cracks from constant thermostat cycling. The resulting cracks cause the radiator to leak. Gm has issued special coverages for certain models but doesn't acknowledge it is a very common problem on other models outside the coverage. Read details...
When I first got the truck the brakes operated perfectly fine after about three days the brakes on the front of the truck would lock up while I was driving and would not release. After two sets of calipers two sets of brake pads a set of rotors a two weeks go by with the mechanic trying to Read details...