Avalanche 4WD V8-5.3L (2011)
11. Locate the rear engine cover (1) on rear of intake manifold.
Note: Ensure that any wiring harness does not interfere with the drilling process of the rear engine cover.
12. Reposition the acoustic foam (if applicable) down from the access location (1).
Note: Drill an 25.4 mm (1 in.) diameter hole in the rear engine cover (1) to access the HVAC module retaining nut located behind rear engine
cover.
