Removal Procedure
- Remove the upper intake manifold. Refer to 
Intake Manifold Replacement 
.
 
- Remove the valve rocker arms and the pushrods. Refer to Valve
Rocker Arm and Pushrod Replacement.
 
- Remove the lower intake manifold. Refer to 
Intake Manifold Replacement 
.
 
- Remove the valve lifter guide bolts.
 
- Remove the valve lifter guide.
 
- Remove the valve lifters.
 
Installation Procedure
- Coat the valve lifters with prelube, GM P/N 12345501 or
equivalent.
 
- Install the valve lifters.
 
- Install the valve lifter guide.
 
- Install the valve lifter guide bolts.
 
Tighten
Tighten the guide bolts to 30 N·m (22 lb ft).
- Install the lower intake manifold. Refer to 
Intake Manifold Replacement 
.
 
- Install the valve rocker arms and pushrods. Refer to Valve Rocker
Arm and Pushrod Replacement.
 
- Install the upper intake manifold. Refer to 
Intake Manifold Replacement 
.