Pre-purchase inspection checklist — 2021 GMC Sierra 1500
The 2021 GMC Sierra 1500 has multiple recalls and moderate complaint levels, particularly concerning the engine and transmission. Recalls related to software issues and mechanical defects significantly impact safety and performance. Limited complaints about other areas suggest these are less common issues. Thorough inspection and test drives are needed to assess potential failures, ensuring any recalls have been addressed before purchase.
NHTSA data on file today
The 2021 GMC Sierra 1500 has 7 NHTSA recall campaigns and 599 owner complaints on file as of . Recall data is refreshed daily from NHTSA.
NCAP overall rating: 4.7 out of 5 stars, averaged across 6 NHTSA-tested trims.
Recall campaigns on file
- NHTSA #26V083000 Rear Wheel Lock Up from Transmission Control Valve Failure NHTSA notice
- NHTSA #25V274000 Engine Failure NHTSA notice
- NHTSA #24V797000 Rear Wheel Lock-Up from Transmission Valve Failure NHTSA notice
- NHTSA #21V985000 Spare Tire Incompatible with Accessory Wheels NHTSA notice
- NHTSA #20V811000 Incorrect Bolts Used To Attach Seat Belts NHTSA notice
- NHTSA #20V792000 Front Center Seat Belts may not be Secured NHTSA notice
- NHTSA #20V684000 Tires may have been Overcured NHTSA notice
Most-cited components in owner complaints
- Engine 323 complaints
- Power Train 145 complaints
- Electrical System 76 complaints
- Engine and Engine Cooling 49 complaints
- Unknown or Other 46 complaints
- Fuel/Propulsion System 41 complaints
Of the 599 complaints on file, 6 report a crash and 6 a fire; across all 599 complaints, owners report 3 injuries (owner-reported, not verified by NHTSA).
Known issues to inspect
Engine component failure
How to check: Check for unusual noises or vibrations during idle.
Transmission control valve failure
How to check: Inspect recall records for transmission software updates.
Various electrical issues
How to check: Verify all electronic systems function well.
Seat belt fastening issue
How to check: Examine seat belt and bracket integrity.
Test-drive walkthrough
- 01
Cold start
What to check: Listen for unusual engine noises or rough idling.
Red flag: Persistent knocking or rattling sounds
- 02
First minute idling
What to check: Check dashboard for warning lights.
Red flag: Check engine or transmission light is on
- 03
Low speed driving
What to check: Monitor for smooth gear transitions.
Red flag: Jerky or delayed gear shifts
- 04
Braking
What to check: Feel for consistent and smooth brake response.
Red flag: Brakes feel spongy or unresponsive
- 05
Highway acceleration
What to check: Notice engine power and responsiveness.
Red flag: Lack of acceleration or strange noises
- 06
Steering control
What to check: Ensure responsive and straight steering alignment.
Red flag: Vibrations or pulling to one side
Questions for the seller
Use this exact phrasing.
- Have any recalls been completed?
- Any recurring mechanical issues?
- Has the transmission been serviced?
- Are all electronic features operational?
- Were there any past accidents?
Documents to request
Don't sign anything until you have these.
- Vehicle recall history
- Service and maintenance records
- Proof of completed recalls
- Title and registration
- Accident history report
Generated by gpt-4o on from the NHTSA recall campaigns and owner-complaint counts on file for the 2021 GMC Sierra 1500 at the time. AI output can be wrong; confirm anything you find with a mechanic.
Next step
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