2021 GMC Canyon Pre-Purchase Inspection Checklist
Known Issues — 2021 GMC Canyon
MODERATE
Infotainment system freezing
MODERATE
6-speed automatic transmission rough cold shifts
MODERATE
2.8L Diesel DEF sensor failures
MINOR
Tailgate cable fraying
MINOR
Wireless CarPlay limited to some trims
MINOR
Rear leaf spring bushing squeak
What to Inspect
- Test 6-speed transmission shift quality
- Test infotainment for freeze
- On Diesel — check DEF system
- Inspect tailgate cables
- Listen for rear leaf spring squeak over speed bumps
- Test all USB and CarPlay connectivity
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Oil change (synthetic) | every 7,500 miles | $60-$90 |
| Transmission fluid service | every 45,000 miles | $150-$250 |
| Spark plugs (V6) | every 60,000 miles | $150-$250 |
| Rear differential fluid | every 45,000 miles | $80-$130 |
| DEF fluid refill (Diesel) | every 5,000 miles | $20-$40 |
| Brake service (pads and rotors) | every 45,000 miles | $300-$500 |
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