GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Chevrolet
🢒
2009
🢒
TrailBlazer - 4WD
🢒
Engine
🢒
Engine Controls and Fuel - 4.2L
🢒 Camshaft Cover Replacement
Removal Procedure
Remove the intake manifold. Refer to
Intake Manifold Replacement
.
Remove the A/C line at the oil level indicator tube bracket nut.
Remove the A/C bracket bolt from the engine lift hook.
Position the A/C line out of the way.
Remove the engine lift bracket.
Disconnect the ignition control module electrical connectors.
Loosen the ignition control module bolts.
Remove the ignition control module.
Disconnect the engine electrical harness housing from the camshaft cover (1) taking care not to damage the clips that hold the housing in place.
Disconnect the fuel injection harness electrical connector.
Loosen and remove the camshaft cover bolts.
Remove the camshaft cover.
Clean and inspect the camshaft cover. Refer to
Camshaft Cover Cleaning and Inspection
.
Installation Procedure
Install a new camshaft cover seal.
Install new rubber ignition control module seals.
Caution:
Refer to
Fastener Caution
in the Preface section.
Install the camshaft cover and secure with the cam cover bolts. Tighten the camshaft cover bolts to
10 N·m (89 lb in)
.
Install the ignition control modules and secure the modules with bolts and tight to
10 N·m (89 lb in)
.
Connect the ignition control module electrical connectors.
Install the fuel injector electrical connectors.
Install the engine electrical harness housing (1).
Install the A/C line bracket to the oil level indicator tube stud and secure the bracket with the nut then tighten to
7 N·m (62 lb in)
.
Install the engine lift bracket and secure the lift hook with the bolts then tighten to
50 N·m (37 lb ft)
.
Install the A/C line bracket to the engine lift bracket and secure the A/C bracket with the bolt then tighten to
10 N·m (89 lb in)
.
Install the intake manifold. Refer to
Intake Manifold Replacement
.