Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC TROUBLE CODE INDEX
2001 Chevrolet Suburban C1500
Diagnostic Trouble Code Index
2001 Chevrolet Suburban C1500SECTION Diagnostic Trouble Code Index
DIAGNOSTIC TROUBLE CODE INDEX
| Diagnostic Procedure | Definition |
|---|---|
| DTC C0221-C0227 or C021 | Front Wheel Speed Sensor Circuit |
| DTC C0229 or C029 | Drop Out of Front Wheel Speed Signals |
| DTC C0235-C0237, C035-C037, or P1504 | Rear Wheel Speed Sensor Circuit |
| DTC C0238 or C038 | Wheel Speed Mismatch |
| DTC C0241-C0254 or C041-C054 | EBCM Control Valve Circuit |
| DTC C0267 or C0268 and C067 or C068 | Pump Motor Circuit Open/Shorted |
| DTC C0269 or C0274 and C069 or C074 | Excessive Dump/Isolation Time |
| DTC C0271-C0273, C0284 | EBCM Malfunction |
| DTC C0269 or C0274 and C069 or C074 | Excessive Dump/Isolation Time |
| DTC C0279 | Powertrain Configuration Not Valid |
| DTC C0281 or C081 | Brake Switch Circuit |
| DTC C0283 (w/NW7) | Traction Switch Shorted to Ground |
| DTC C0271-C0273, C0284 | EBCM Malfunction |
| DTC C0287, P1644, or P1689 | Delivered Torque Circuit |
| DTC C0290 or C0292 | Lost Communications With PCM |
| DTC C0297 | Powertrain Configuration Data Not Received |
| DTC C0298 or P1571 | Powertrain Indicated Traction Control Malfunction |
| DTC C0287, P1644, or P1689 | Delivered Torque Circuit |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.