2021 Cadillac CT4 Pre-Purchase Inspection Checklist
Known Issues — 2021 Cadillac CT4
MODERATE
9-speed transmission shudder on standard models
MODERATE
2.0T intake valve carbon buildup
MODERATE
Cam cover oil leak on 2.0T
MINOR
Infotainment connectivity glitches
MINOR
V-Series Blackwing: 3.6TT oil consumption watch
MINOR
Front brake caliper wear on performance-driven units
What to Inspect
- 9-speed transmission shudder
- Cam cover oil leak
- Intake valve carbon
- V-Series brake condition
- Infotainment update
- Service history check
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Engine oil service | every 7,500 miles | $70-$120 |
| Major service (plugs, filters, fluids) | every 30,000 miles | $400-$700 |
| Transmission fluid | every 45,000 miles | $180-$300 |
| Intake valve cleaning (2.0T) | every 40,000-60,000 miles | $400-$700 |
| Brake pad/rotor replacement | every 20,000-35,000 miles | $350-$700 |
| Tire replacement | every 20,000-35,000 miles | $700-$1,200 |
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