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2010 GMC Sierra 1500 Hybrid – No Crank With P1AE2, P1B05 and P1B06
CUSTOMER CONCERN Vehicle will not crank after engine service, and DTCs P1AE2, P1B05 and P1B06 are stored. CAUSE Inspection confirmed the drive-motor-generator control-module sight shield was not installed, leaving the high-voltage interlock circuit open. CORRECTION Install and secure the drive-motor-generator control-module sight shield to close the high-voltage interlock circuit.
2010 GMC Sierra 1500 Hybrid – Oil Pressure Warning With P0521
CUSTOMER CONCERN Oil-pressure warning remains on while the engine is running. CAUSE DTC P0521 was stored, and testing confirmed a failed oil-pressure sending switch. CORRECTION Remove and replace the failed oil-pressure sending switch.
2010 GMC Sierra 1500 Hybrid – Lower Brake and Turn Lamp Inoperative
CUSTOMER CONCERN Lower right brake and turn-signal lamp is inoperative while the upper lamp operates normally. CAUSE Power, ground, and bulb checks confirmed a failed lower lamp bulb socket. CORRECTION Remove and replace the failed brake and turn-signal bulb socket.
2010 GMC Sierra 1500 Hybrid – Cylinder 6 Misfire With No Compression
CUSTOMER CONCERN Engine misfires on cylinder 6 and compression testing shows no compression on that cylinder. CAUSE Inspection confirmed a failed valve roller lifter on cylinder 6. CORRECTION Remove and replace the failed valve roller lifter.
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