Cooling System - GMC 2006 Envoy Owner's Manual

Cooling System

When you decide it is safe to lift the hood, here is what
you will see:
4.2L L6 Engine
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Fan
5-30
5.3L V8 Engine
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Fan
If the coolant inside the coolant recovery tank is boiling,
do not do anything else until it cools down. The
vehicle should be parked on a level surface.