Avalanche 4WD V8-5.3L (2011)
Camshaft: Service and Repair
Camshaft Position Actuator Solenoid Valve Inspection
Camshaft Position Actuator Solenoid Valve Inspection
Important: Do not use the camshaft position (CMP) actuator solenoid valve again. Install a NEW valve during assembly. The inspection
procedure below is provided for on-vehicle diagnostic purposes only.
1. With the CMP magnet removed, inspect for a sticking valve spool or broken valve spool spring.
2. Depress the valve spool into the housing. The valve should move freely with no binding or sticking and minimal resistance inward. When released,
the valve spring should return the spool to the proper extended position (1) of 6.08-6.12 mm (0.239-0.241 in).
