GMC Fault Codes
GMC vehicles share many generic OBD-II codes plus manufacturer-specific definitions. Use the list below to look up codes that appear on GMC models.
Common GMC Issues
Always start with oil condition, vacuum leaks, and basic maintenance items before replacing expensive parts.
2 GMC-related fault code(s) in our database
| Code | Description | System | Severity |
|---|---|---|---|
| P1345 | Crankshaft/Camshaft Position Correlation (Bank 1) | Ignition System | High |
| P1441 | EVAP System Flow During Non-Purge Period | Emission Control | Low |
Recommended Scanners for GMC Owners
A good OBD2 scanner helps you read and clear codes yourself and avoid unnecessary shop visits.
BlueDriver Bluetooth Pro OBDII Scan Tool
Professional Bluetooth scanner with live data, enhanced diagnostics (ABS/SRS) and repair reports. Works with iPhone & Android. No subscription fee.
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Best-selling handheld code reader. Read & clear engine codes, live data, freeze frame. No phone required. Highly rated for beginners.
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Simple plug-and-play sensor that explains codes in plain English via free app. Ideal for first-time users.
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