Tag: GMC

Possible causes – Obstructions in the airflow of the radiator or transmission cooler– Kinked or damaged transmission fluid lines– Damage to the transmission cooler Tech description Check transmission fluid level and condition and replaced fluid if necessary. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0634 GMC OBD Code Description The control…

Possible causes – Plugged vapor canister– Faulty vent solenoid– Pinched or blocked EVAP hose– Faulty FTP sensor Tech description Dirt and dust intrusion into the EVAP canister vent hose assembly, resulting in restricted air flow, may cause this condition. There is a bulletin for the following models:1999-2007 GMC Sierra (Classic) Models2007-2008 GMC Sierra Models GMC…

Possible causes – Poor connection at the Throttle Actuator Control (TAC) module– Faulty TAC module– Faulty Throttle Pedal Position (TPP) or Throttle Position (TPS) sensors– Binding or bent throttle plate-failed throttle body When is the obd code mean? The Powertrain Control Module (PCM) has detected a throttle plate out of position based on commanded and…

Possible causes – Powertrain Control Module (PCM) not programed– PCM program– Faulty PCM– Wrong PCM Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0602 GMC OBD Code Description This diagnostic trouble code (DTC) indicates that the Powertrain Control Module (PCM) internal EEPROM is not flashed with any vehicle software. If you install…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty Pressure Control Solenoid– Pressure Control Solenoid harness is open or shorted– Pressure Control Solenoid circuit poor electrical connection When is the obd code mean? When the Powertrain Control Module (PCM) detects a continuous open or short in the Pressure Control (PC) solenoid valve circuit…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty shifting solenoid valve– Shifting solenoid valve harness is open or shorted– Shifting solenoid valve circuit poor electrical connection When is the obd code mean? When the Powertrain Control Module (PCM) detects a continuous open, short to ground or short to power in the 3-2…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty torque converter clutch solenoid valve– Torque converter clutch solenoid valve harness is open or shorted– Torque converter clutch solenoid valve circuit poor electrical connection When is the obd code mean? When the PCM detects a continuous open, short to ground or short to power…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty torque converter clutch solenoid valve– Torque converter clutch solenoid valve harness or connectors– Torque converter clutch solenoid valve circuit is open or shorted– Transmission internal mechanical problem Tech description When the a transmission solenoid is stuck on, in most cases the problem is not…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty torque converter clutch solenoid valve– Torque converter clutch solenoid valve harness or connectors– Torque converter clutch solenoid valve circuit is open or shorted– Transmission internal mechanical problem When is the obd code mean? Lock-up does not occur when driving in lock-up range or lockup…

Possible causes – Low transmission fluid level– Transmission cooling system concerns When is the obd code mean? When the Powertrain Control Module (PCM) detects a high transmission fluid temperature (TFT) for a long period of time, then code P0218 will set. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0218 GMC OBD…