Chevrolet Diagnostic Trouble Codes
OBD2 fault codes seen on Chevrolet vehicles, with what each code means, its typical repair cost range, and notes on specific Chevrolet models.
Misfire
Cylinder 7 Misfire Detected
Chevrolet Silverado 1500 5.3 V8 (Gen IV, AFM) • 2007-2013
The 5.3 V8 numbers its odd cylinders on the driver's (left) bank, so cylinder 7 is the rearmost cyli...
Cylinder 8 Misfire Detected
Chevrolet Silverado 1500 5.3 V8 (Gen IV, AFM) • 2007-2013
On the 5.3 V8 the even-numbered cylinders sit on the passenger (right) bank, so cylinder 8 is the re...
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. This is a well-kn...
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 common enough that the module is the first suspect, not the last....
Ignition
Ignition Coil E Primary/Secondary Circuit Malfunction
Chevrolet Silverado 1500 5.3 V8 (Gen IV) • 2007-2013
On the 5.3 V8, coil E fires cylinder 5, the third cylinder back on the driver's (left) bank (GM puts...
Ignition Coil F Primary/Secondary Circuit Malfunction
Chevrolet Silverado 1500 5.3 V8 (Gen IV) • 2007-2013
On the 5.3 V8, coil F fires cylinder 6, the third cylinder back on the passenger (right) bank (GM pu...
Ignition Coil G Primary/Secondary Circuit Malfunction
Chevrolet Silverado 1500 5.3 V8 (Gen IV) • 2007-2013
On the 5.3 V8, coil G fires cylinder 7, the rearmost cylinder on the driver's (left) bank (GM puts o...
Ignition Coil H Primary/Secondary Circuit Malfunction
Chevrolet Silverado 1500 5.3 V8 (Gen IV) • 2007-2013
On the 5.3 V8, coil H fires cylinder 8, the rearmost cylinder on the passenger (right) bank (GM puts...
Cooling System
Emissions
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