Chevrolet Silverado / GMC Sierra. Service manual — part 2041

Fig. 41: Identifying Alignment Hole & Locating Pin
Courtesy of GENERAL MOTORS CORP.

7. Identify the alignment hole (1) in the rear face of the CMP actuator and the locating pin (2)

on the front face of he camshaft.

IMPORTANT:

Properly locate the CMP actuator onto the locating pin of
the camshaft.

The sprocket teeth and timing chain teeth must mesh.

The camshaft and the crankshaft sprocket alignment
MUST be aligned properly.

Do not use the CMP solenoid valve again. Install a NEW
CMP valve during assembly.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 42: View Of CMP Actuator & Timing Chain
Courtesy of GENERAL MOTORS CORP.

8. Align the CMP actuator so the timing mark is in the 6 o'clock position.

9. Install the CMP actuator (235) and timing chain (208). Align the hole in the face of the

CMP actuator with the locating pin on the front face of the camshaft.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 43: Proper Installation Of CMP Actuator
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

10. Use care to install the actuator completely onto the front of the camshaft. Position your

fingers onto the face of the actuator sprocket and push the actuator onto the front of the
camshaft. Never push on the reluctor wheel when attempting to install the actuator.

CAUTION: Do not push or pull on the reluctor wheel of the camshaft

position (CMP) actuator during removal or installation.
The reluctor wheel is retained to the front of the CMP
actuator by 3 roll pins. Pushing or pulling on the wheel
may dislodge the wheel from the front of the actuator. The
actuator return spring is under tension and may rotate the
dislodged reluctor wheel, causing personal injury.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado