Pre-purchase inspection checklist

2012 GMC sierra 3500 Denali

VIN 1GT426E80CF142248

Inspect these first — most-reported on this model

Electrical System (9 owner reports)Test every electrical feature: windows, locks, infotainment, charging and all lights. Watch for flickering, dead accessories or warning lights.
Engine (8 owner reports)Listen for knocks or ticking, check for leaks and blue/white exhaust smoke, and make sure it doesn't overheat. No check-engine light should be on.
Structure (6 owner reports)Inspect for rust, fresh undercoating, mismatched paint, uneven panel gaps and any sign of prior collision or frame repair.
Air Bags (5 owner reports)Confirm the airbag light turns on then off at startup — if it stays lit there's a fault (costly, and a safety risk). Check for signs of prior deployment.
Service Brakes (5 owner reports)Brakes should feel firm and quiet — no grinding, pulsing or pulling. Check for an ABS light and uneven pad/rotor wear.
Power Train (5 owner reports)Drive through every gear: watch for slipping, hard or delayed shifts, and shudder. Check for transmission/driveline leaks and noises.

Paperwork & identity

VIN on the dash, driver door jamb and title all match exactly.
Seller's name matches the title and photo ID.
Service and repair records available and consistent with the mileage.
No lien still listed on the title (ask for a lien release if there was one).

Engine & drivetrain

Cold-start the engine — listen for knocks, ticking or rattles.
No blue (oil) or white (coolant) smoke from the exhaust.
Fluids clean and at level — oil, coolant, brake and transmission.
No oil, coolant or transmission leaks under the car after it idles.
All dashboard warning lights clear a few seconds after startup.

Body, tyres & underside

Panel gaps even; paint colour and texture match across panels (repaint = past damage).
No fresh undercoating hiding rust or recent weld repairs.
Tyres worn evenly and matched; check the date codes and the spare.
No rust on the frame, floor pans, suspension mounts or brake lines.

Test drive

Shifts smoothly through every gear — no slipping, shudder or clunk.
Brakes straight and quiet — no pulling, grinding or pulsing.
Steering tracks straight; no vibration at highway speed.
Air-con, heater, lights, wipers, windows and infotainment all work.

Before you pay

Independent pre-purchase inspection by a trusted mechanic.
Open safety recalls confirmed fixed (a franchised dealer repairs them at no charge). 4 recall campaigns on file for this model year — verify at nhtsa.gov/recalls.
Agreed price reflects anything the inspection turned up.

Notes

Vehicle data only — no owner information. This checklist is informational and based on NHTSA complaint patterns for the 2012 GMC sierra 3500; it is not a substitute for a professional inspection or a guarantee of condition. Full history report at https://carlogs.xyz/1GT426E80CF142248/2012/gmc/sierra-3500/mt/usa.