GMC OBD Codes: Meaning & Fixes
GMC: 48 error codes with meaning, severity, likely causes and repair cost estimates.
22Codes
3.1Average severity
32%High or critical
5%DIY-friendly
Severity distribution
Field data · GMC
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.
Most viewed
P0011
Powertrain
The bank 1 intake cam sits further advanced than the PCM asked for, usually an oil or control…
Moderate
P0014
Powertrain
The bank 1 exhaust cam won't follow its target and stays too far advanced; think oil, valve…
Moderate
P0018
Powertrain
The bank 2 intake cam is out of step with the crankshaft on a V or boxer engine; chain wear…
High
P0756
Powertrain
Solenoid B isn't moving fluid the way the TCM expects – the car may pull away in 3rd or 4th.
High
P0700
Powertrain
The transmission computer found a fault and asked for the check engine light – read the TCM…
Moderate
P0017
Powertrain
The bank 1 exhaust cam signal doesn't line up with the crankshaft; think chain, exhaust phaser…
Moderate
All codes (7)
B0012
Body
Airbag firing-loop fault; location depends on the make: passenger dash airbag or, on GM…
High
B0051
Body
SAE: front middle seat buckle sensor fault. On GM vehicles: the airbag module has logged…
High
P0016
Powertrain
The bank 1 intake cam and the crankshaft are out of step, most often from a stretched or jumped…
High
P0018
Powertrain
The bank 2 intake cam is out of step with the crankshaft on a V or boxer engine; chain wear…
High
P0300
Powertrain
The engine computer sees misfires that jump between cylinders or hit several cylinders at once.
High
P0756
Powertrain
Solenoid B isn't moving fluid the way the TCM expects – the car may pull away in 3rd or 4th.
High
P0894
Powertrain
The transmission computer measured slip inside the gearbox that shouldn't be there. Clutches…
High