Pre-purchase inspection checklist

2012 GMC lifted sierra deisel duramax SLT

VIN 1GT121C80CF110148

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).
• 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 lifted sierra deisel duramax; it is not a substitute for a professional inspection or a guarantee of condition. Full history report at https://carlogs.xyz/1GT121C80CF110148/2012/gmc/lifted-sierra-deisel-duramax/id/usa.