Case file · GMC-ACADIA-2007-2016 · Field document

GMC Acadia 2007–2016 · Pre-purchase checklist

Bring this to the inspection. Every check below is specific to this generation's documented failure modes — not generic used-car advice.

1. Check 01

   Cold-start the engine and listen for a rattle in the first few seconds — that's the classic stretched-timing-chain tell. Then scan for codes P0008/P0009/P0016–P0019.

2. Check 02

   Drive it through all gears. Feel for a flare or RPM spike going into 3rd or 5th, and confirm reverse engages firmly and immediately — slipping reverse is the wave-plate death rattle.

3. Check 03

   Ask for records proving the timing chain and/or 6T75 transmission were already repaired or replaced; a car with documented work is safer than an untouched one.

4. Check 04

   Check the power steering: turn lock-to-lock at idle, listen for a chirp/whine, and look for fluid weeping from the pump — a known leak point.

5. Check 05

   Look under the front of the engine for coolant residue at the water pump; pull the dipstick and cap to check for coolant/oil mixing.

6. Check 06

   Run the A/C on a hot day and watch that the compressor clutch stays engaged over bumps — intermittent cutout points to the underhood harness/fuse-block issue.

7. Check 07

   On AWD cars, listen for driveline whine and check for service history on the power takeoff unit and rear differential.

8. Check 08

   Pull a VIN recall/special-coverage report (GM owner site or a dealer) to see what was performed and what's now expired.