Cooling System

If the vehicle has the Duramax® Diesel engine, see the Duramax® Diesel Supplement for more information.

The cooling system allows the engine to maintain the correct working temperature.

5.3 L Engine Shown (4.3 L, 4.8 L, 6.0 L and, 6.2 L Engines Similar)
5.3 L Engine Shown (4.3 L, 4.8 L, 6.0 L and, 6.2 L Engines Similar)

A. Coolant Surge Tank
B. Coolant Surge Tank Pressure Cap
C. Engine Cooling Fan (Out of View)

WARNING
An electric engine cooling fan can start even when the engine is not running. To avoid injury, always keep hands, clothing, and tools away from any engine cooling fan.

WARNING
Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned.

Do not run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle.

Notice: Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner, at 50 000 km (30,000 mi) or 24 months, whichever occurs first. Any repairs would not be covered by the vehicle warranty.

Always use DEX-COOL (silicate-free) coolant in the vehicle.

    See also:

    Interior
    Base-model SL G1500 vans have vinyl high-back front buckets and a pair of rear bench seats for eight-passenger capacity. A dozen people fit into the G2500/3500 vans, seated on twin three-passenger ...

    Tire Pressure Monitor
    This vehicle may have a Tire Pressure Monitor System (TPMS). The TPMS warning light alerts you to a significant loss in pressure of one of the vehicle's tires. If the warning light comes on, stop a ...

    FM
    FM signals only reach about 16 to 65 km (10 to 40 mi). Although the radio has a built-in electronic circuit that automatically works to reduce interference, some static can occur, especially aroun ...