Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1735 (ENGINE CONTROLS AND FUEL - 2.4L - DTC P0010 TO DTC P0315)DTC P0016 OR P0017CIRCUIT/SYSTEM TESTING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Circuit/System Testing
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Incorrect engine oil viscosity, aftermarket engine oil additives, or engine oil that is overdue for changing, can greatly affect the performance of the camshaft actuator.
- Ignition OFF, inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications .
- Remove the CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement .
- Connect a fused jumper wire between the CMP actuator high control circuit terminal A at the solenoid and B+. Connect a jumper wire to the CMP actuator low reference circuit terminal B at the solenoid. Momentarily touch the jumper wire to ground. Observe the spool valve inside the CMP actuator. The spool valve should move from fully closed to fully opened position.
- If the spool valve inside the CMP actuator solenoid does not move, replace the CMP actuator solenoid.
- Inspect the CMP actuator for binding or being stuck.
- Inspect the engine for the following conditions:
- An incorrectly installed camshaft sensor
- An incorrectly installed crankshaft sensor
- An incorrectly installed camshaft actuator
- Incorrect valve timing
- A loose camshaft reluctor wheel
- A loose crankshaft reluctor wheel
- Excessive crankshaft end play
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.