Other information:
DISASSEMBLY
Remove the rear bumper cover.
Refer to: Rear Bumper Cover (501-19 Bumpers, Removal and Installation).
Disconnect the hands-free liftgate module electrical connector.
Disconnect the rear park aid sensor electrical connectors...
Valve Train Analysis - Engine Off, Valve Cover Removed
NOTE:
The following component inspections are used to diagnose valve train concerns.
Check for damaged or severely worn parts and correct assembly.
Valve Train Analysis - Camshaft Lobe Lift
Remove the spark plugs...