2020 GMC Sierra 1500 Engine Problems
From NHTSA owner complaints and recalls. Updated Oct 17, 2026.
How common are engine problems on the 2020 GMC Sierra 1500?
254 owners have reported engine problems on the 2020 GMC Sierra 1500, 53% of all complaints for this year and the most reported problem area. Most reported problems happened at about 33,000–99,000 miles. No recall covers this problem.
254 complaints 53% of all 2020 complaints 65,000 miles typical
Which parts fail
The specific part named in each complaint.
Mileage when it failed
Each dot is a complaint that gave a mileage (54 of 254). The amber line is the middle value.
When problems were reported
Engine complaints by the year the problem happened.
Engine complaints by Sierra 1500 year
Related recalls
No recall covers engine problems on the 2020 GMC Sierra 1500. See all 12 recalls for this year.
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Common questions
What are common 2020 GMC Sierra 1500 engine problems?
Complaints most often name the urea injection system (DEF), emission control and exhaust system.
At what mileage do 2020 GMC Sierra 1500 engine problems happen?
Most complaints that gave a mileage fell between about 33,000–99,000 miles. The middle value is about 65,000 miles.
Is there a recall for 2020 GMC Sierra 1500 engine problems?
NHTSA lists no recall for this problem on the 2020 GMC Sierra 1500. If you have the problem, file a complaint at nhtsa.gov so it is counted.
Which Sierra 1500 year has the most engine complaints?
The 2021 Sierra 1500, with 361 complaints.
Source: NHTSA complaints and recalls databases. Complaints are unverified owner reports.