Cooling System - GMC SIERRA 2020 Owner's Manual

346 Vehicle Care
Caution
If the air cleaner/filter is off, dirt
can easily get into the engine,
which could damage it. Always
have the air cleaner/filter in place
when driving.

Cooling System

If the vehicle has the Duramax
diesel engine, see the Duramax
diesel supplement.
The cooling system allows the
engine to maintain the correct
working temperature.
2.7L L4 Engine (L3B)
4.3L V6 Engine (LV3)
5.3L V8 Engine (L84) Shown, 5.3L
V8 Engine (L82) and 6.2L
V8 Engine (L87) Similar
1. Engine Electric Cooling
Fans (Out of View)
2. Coolant Surge Tank and
Pressure Cap
Warning
An underhood electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and tools
away from any underhood
electric fan.