| C0561 | GMC Error Code C0561: How to Fix It | medium | Medium |
| P0008 | GMC Error Code P0008: How to Fix It | high | Hard |
| P0011 | GMC Engine Error Code P0011: How to Fix It | high | Medium |
| P0014 | GMC Error Code P0014: How to Fix It | high | Hard |
| P0017 | GMC P0017 Error Code: How to Fix It | high | Hard |
| P0021 | GMC Error Code P0021: How to Fix It | high | Hard |
| P0171 | GMC Error Code P0171: How to Fix It | medium | Medium |
| P0174 | GMC P0174 Error Code: How to Fix It | medium | Medium |
| P0300 | GMC P0300 Error Code: How to Fix It | high | Medium |
| P0301 | GMC Engine Error Code P0301: How to Fix It | high | Medium |
| P0306 | GMC P0306 Error Code: How to Fix It | high | Medium |
| P0420 | GMC Error Code P0420: How to Fix It | medium | Medium |
| P0430 | GMC P0430 Error Code: How to Fix It | medium | Medium |
| P0449 | GMC Error Code P0449: How to Fix It | low | Medium |
| P0455 | GMC Error Code P0455: How to Fix It | low | Medium |
| P0496 | GMC Vehicle Error Code P0496: How to Fix It | low | Medium |
| P0507 | GMC P0507 Error Code: How to Fix It | low | Medium |
| P0521 | GMC P0521 Error Code: How to Fix It | high | Medium |
| P0606 | GMC Error Code P0606: How to Fix It | critical | Hard |
| P0700 | GMC P0700 Error Code: How to Fix It | high | Medium |