C 2500 Truck 2WD V8-5.7L VIN R (1997)
Coolant Reservoir: Description and Operation
DESCRIPTION
A "see-through" plastic reservoir is connected to the radiator by an overflow hose. As the vehicle is driven, the coolant is heated and expands. The
portion of the fluid displaced by this expansion flows from the radiator into the coolant recovery reservoir. When the vehicle is stopped and the
coolant cools and contracts, vacuum draws the displaced coolant back into the radiator. Thus, the radiator is kept filled with coolant to the desired
level at all times, resulting in increased cooling efficiency.
Keep the coolant level between the "ADD" and "FULL" marks on the recovery reservoir. These marks are about one liter (one quart) apart. Use a
50/50 mixture of ethylene glycol antifreeze and water (distilled water preferred) to keep the system at the "FULL" mark when hot.
NOTE: When adding coolant, It Is Important that you use GM Goodwrench DEX-COOL coolant. If coolant other than DEX-COOL is added to
the system the engine coolant will require change sooner at 50,000 km (30,000 miles) or 24 months.
