GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
2007
🢒
Envoy - 2WD
🢒
Engine
🢒
Engine Mechanical - 4.2L
🢒 Water Pump Cleaning and Inspection
Remove all sealing material from the sealing surface.
Inspect the water pump impeller for damage.
Inspect the water pump shaft for looseness.
Inspect the threads for damage.
Replace the water pump if necessary.