Chevrolet Diagnostic Trouble Codes
Common OBD2 fault codes found on Chevrolet vehicles with model-specific causes, known issues, TSBs, and adjusted repair cost estimates. Each guide is tailored for Chevrolet owners.
Electrical
Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
Chevrolet Silverado • 1999-2013
GM LS-series V8 (4.8, 5.3, 6.0) with knock sensors mounted in the lifter valley under the intake man...
Engine Oil Pressure Sensor/Switch Circuit Malfunction
Chevrolet Silverado 1500 • 2007-2013
5.3L V8 (LC9/LMG) sensor sits under the intake manifold at the rear of the valley. Covered by GM TSB...
Engine Oil Pressure Sensor/Switch Range/Performance
Chevrolet Silverado 1500 • 2007-2014
5.3L and 6.0L V8s with Active Fuel Management. The sensor lives under the intake manifold and is a k...
Lost Communication With ECM/PCM 'A'
Chevrolet Silverado 1500 (GMT900) • 2007-2013
GMT900 trucks use GMLAN (single-wire and dual-wire). U0100 commonly traces to rodent damage on the e...
Lost Communication With Anti-Lock Brake System (ABS) Control Module
Chevrolet Silverado 1500 • 2007-2013 (GMT900, 5.3L Vortec)
EBCM failures on GMT900 trucks are so common that GM issued Special Coverage 14882 on some VINs. Spe...
Cooling System
Emissions
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