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2018 Gmc Sierra 1500

2018 GMC Sierra 1500: power train dominates owner complaints

Across 293 owner complaints to NHTSA, the power train is the single most-reported area at 125 reports (43%), more than the next two categories combined. It also carries the heaviest safety toll here, with 4 crashes and 3 injuries. The engine is next at 62 reports (21%), followed by service brakes (43, 15%), the electrical system (42, 14%), and steering (29, 10%). One fire is noted, in the electrical system.

Most reported areas

Power Train safety 43%
The top complaint area by a wide margin: 125 reports (43%), with 4 crashes and 3 injuries, the most of any category. One owner describes persistent vibration at idle and above 60 mph, with five dealer visits and no fix.
Engine0 21%
Second-most reported at 62 complaints (21%), with no crashes, fires, or injuries noted. One owner reports a loss of power in every gear, eventually limited to 25 mph at 3000 rpm.
Service Brakes safety 15%
43 complaints (15%), including 2 crashes. One owner reports the truck steering left or right at random across all speeds, pulling toward the edge of the road if the wheel is released.
Electrical System safety 14%
42 complaints (14%), including the only fire in this data. One owner reports erratic steering, brakes that stay engaged while driving, and repeated infotainment glitches.
Steering safety 10%
29 complaints (10%), including 1 crash. One owner reports the truck steering left or right on its own at any speed, drifting off the road if the wheel is let go.

Source: NHTSA owner complaints · 293 complaints

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General information compiled from public NHTSA complaint data, for reference only — not professional advice and not reviewed by automotive experts. Verify before acting; Team AM is not responsible for decisions made from it.