2020 GMC Sierra 1500 Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train ranks on this vehicle
Share of the 436 complaints citing each category; one complaint can cite several. Full breakdown on the 2020 GMC Sierra 1500 overview page.
What owners report
“Consistent issues with my truck. It is a 2020 GMC Sierra 1500 vin: [XXX]. In April 2022, my truck started to exhibit concerning issues. I…”NHTSA complaint 11484147 — filed 09/12/2022
“The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle shuddered. The vehicle was taken…”NHTSA complaint 11458045 — filed 03/23/2022
“I purchased the 2020 Sierra 1500 because the label on the truck frame states that it can tow 9300lbs. Subsequently, in April 2021, I purchased…”NHTSA complaint 11432679 — filed 09/12/2021
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2020 GMC Sierra 1500 have transmission & power train problems?
Power Train is the #2 most-reported problem area on the 2020 GMC Sierra 1500: 85 of 436 complaints on file (19.5%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2020 GMC Sierra 1500 have in total?
436 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 11 involved a crash, 5 involved a fire, 13 reported injuries, and none reported deaths.
What does NHTSA's power train category include?
NHTSA groups complaints about the transmission (automatic or manual), driveline, axles, transfer case and related parts under a single component category called POWER TRAIN. This page reports that category as NHTSA defines it.
