2021 GMC Yukon Pre-Purchase Inspection Checklist
Known Issues — 2021 GMC Yukon
CRITICAL
DFM lifter failure on 5.3L and 6.2L V8
MODERATE
10-speed transmission rough or hard shifts
MODERATE
Independent rear suspension adjustment rattle
MODERATE
3.0L Diesel turbo vane actuator sticking
MINOR
Power running board deployment failure
MINOR
Large rear panoramic glass stress cracking
What to Inspect
- Check V8 for DFM lifter tick at idle
- Test 10-speed transmission shift quality
- Drive over rough roads for IRS rattle
- On Diesel — check turbo for fault codes
- Test power running boards deploy/retract
- Inspect panoramic rear glass for stress cracks
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Oil change (synthetic) | every 7,500 miles | $90-$130 |
| Transmission fluid service | every 45,000 miles | $200-$350 |
| Spark plugs (V8) | every 60,000 miles | $250-$400 |
| Rear differential fluid | every 45,000 miles | $120-$180 |
| Transfer case fluid | every 45,000 miles | $100-$150 |
| DEF fluid refill (Diesel) | every 10,000 miles | $30-$60 |
| Brake service (pads and rotors) | every 50,000 miles | $500-$750 |
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