On this page you can find the meaning of the fault code you may be seeing coming from your GMC.
Either choose your model from below or scroll down even further to search and see popular fault codes across all GMCs.
(click your model)
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Popular GMC Fault Codes
These are the most popular GMC fault codes that people are searching for.
Transmission Component Slipping/ Transmission Mechanical Transfer Case 4x4 Switch Circuit FailureLearn More
SCR NOx Catalyst Efficiency Below ThresholdLearn More
IMRC Input Error (Bank 1)Learn More
Engine Position System Performance - Bank 1Learn More
EBCM Motor Relay Circuit Low When On (Chevrolet)Learn More
Evaporative Emission Control System Purge Control Valve circuit MalfunctionLearn More
Lost Communication with TCMLearn More
Lost Communication With Body Control ModuleLearn More
SCP (J1850) Invalid or Missing Data for Primary IdLearn More
Lost Communication With Fuel Pump Control ModuleLearn More
A/T FI Signal A High InputLearn More
SGC (Cam Position) Sensor Circuit Malfunction/ Crankshaft Position - Camshaft Position CorrelationLearn More
HO2S Insufficient Switching Sensor 1Learn More
Cam Control FaultLearn More
GMC models tend to be slightly more upmarket than Chevrolet but usually less luxurious than Cadillac.
As the technology is shared among these companies you can expect to see them share common fault codes among the models.
One of the most common GMC error codes to appear on your model is going to be the P1870. This P1870 error code is triggered by a component slipping in the automatic transmission. The computer that controls the automatic transmission keeps track of many components in the unit through sensors and if one of these sensors falls out of range then you can expect to see this code appear on an OBD2 reader.
Alongside that error code could also be the U0073 warning. This is caused by a lack of communication between the ECU and the PCM (a device that controls the fuel intake system). It is most likely that alongside this error you are experiencing a change in the behavior of the engine.
Another common Ford fault code is P0443 – signifying a problem with the purge control valve. This purge control valve is responsible for ensuring that fuel vapors do not escape into the atmosphere. It is controlled by an electronic solenoid which can become faulty along with the wiring and the module that controls these components too.
- Models: 5