GM Service Manual Online
For 1990-2009 cars only

DTC List

Description

Module

DTC B2725 ATC Mode Switch Circuit Malfunction

ATC

DTC C0300 Rear Speed Sensor Malfunction

ATC

DTC C0305 Front Speed Sensor Malfunction

ATC

DTC C0308 Motor A/B Circuit Low

ATC

DTC C0309 Motor A/B Circuit High

ATC

DTC C0310 Motor A/B Circuit Open

ATC

DTC C0315 Motor Ground Circuit Open

ATC

DTC C0323 T-Case Lock Circuit Low

ATC

DTC C0324 T-Case Lock Circuit High

ATC

DTC C0327 Encoder Circuit Malfunction

ATC

DTC C0367 Front Axle Control Circuit High

ATC

DTC C0374 General System Malfunction

ATC

DTC C0376 Front/Rear Shaft Speed Mismatch

ATC

DTC C0387 Unable to Perform Shift

ATC

DTC C0550 ECU Malfunction

ATC

DTC C0611 VIN Information Error

ATC