2021 GMC Sierra 1500 Engine Problems
From NHTSA owner complaints and recalls. Updated Oct 17, 2026.
How common are engine problems on the 2021 GMC Sierra 1500?
361 owners have reported engine problems on the 2021 GMC Sierra 1500, 62% of all complaints for this year and the most reported problem area. Most reported problems happened at about 33,000–83,000 miles. 1 recall covers this area.
361 complaints 62% of all 2021 complaints 59,000 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 (69 of 361). 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
Hard parts internal / mechanical
2L V8 gas engine. The connecting rod and/or crankshaft engine components may have manufacturing defects that can lead to engine damage and engine failure. Engine failure increases the risk of a crash.
Fix: Dealers will inspect the engine, and as necessary, repair or replace the engine. For vehicles that pass inspection, dealers will add higher viscosity oil, install 6 oil fill cap, replace the oil filter, and update the owner's manual.
Recall 25V274000 · Apr 2025Get an email when your 2021 GMC Sierra 1500 gets a new recall
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Other 2021 GMC Sierra 1500 problems
Common questions
What are common 2021 GMC Sierra 1500 engine problems?
Complaints most often name the hoses / lines / piping / fittings and crank / camshaft position sensor.
At what mileage do 2021 GMC Sierra 1500 engine problems happen?
Most complaints that gave a mileage fell between about 33,000–83,000 miles. The middle value is about 59,000 miles.
Is there a recall for 2021 GMC Sierra 1500 engine problems?
Yes: 25V274000. Check your VIN at nhtsa.gov/recalls to see if the work was done.
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.