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This category contains a list of Diagnostic Trouble Codes (DTCs) specific to GM vehicles.

GM DTC Codes

GM DTC Codes GM DTC Codes Description B2290 RR seat motor #1 circuit malfunction P0171 Fuel System Too Lean Bank 1 P0300 Random Cylinder Misfire (Cylinder Not Specified) P0301 Cylinder #1 Misfire P0340 Camshaft Position Sensor “A” Circuit Malfunction P0420 Catalyst System Efficiency Below Threshold… Read More »GM DTC Codes