Chevrolet Silverado / GMC Sierra. Service manual — part 1999

Installation Procedure

Fig. 354: View Of CMP Actuator Solenoid Valve
Courtesy of GENERAL MOTORS CORP.

1. Install a NEW CMP actuator solenoid valve (234).

With the CMP actuator properly positioned onto the camshaft, the CMP actuator solenoid
valve can be threaded completely into the camshaft using light hand pressure. Tighten by
hand until snug.

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. 355: Tightening CMP Actuator Solenoid Valve
Courtesy of GENERAL MOTORS CORP.

2. Tighten the CMP actuator solenoid valve.

Tighten:

1. Tighten the CMP actuator solenoid valve a first pass to 65 N.m (48 lb ft).

2. Tighten the CMP actuator solenoid valve a final pass an additional 90 degrees using

the.

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. 356: View Of Special Tool & Bolts
Courtesy of GENERAL MOTORS CORP.

3. Remove the J 42386-A (1). See Special Tools .

4. Install the CMP actuator magnet. Refer to Camshaft Position Actuator Magnet

Replacement.

CAMSHAFT POSITION ACTUATOR REPLACEMENT

Tools Required

EN 46330 Timing Belt Tensioner Retaining Pin. See Special Tools .

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

J 45059 Angle Meter

Removal Procedure

Fig. 357: View Of CMP Actuator Solenoid Valve
Courtesy of GENERAL MOTORS CORP.

1. Remove the oil pump. Refer to Oil Pump, Screen, and Crankshaft Oil Deflector

Replacement (LY6, L76 and L92) or Oil Pump, Screen, and Crankshaft Oil
Deflector Replacement (LH6, LMG, LY2 and LY5) .

2. Remove and discard the camshaft position (CMP) actuator solenoid valve (234).

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