GM Service Manual Online
For 1990-2009 cars only

Object Number: 1374  Size: SH

Caution: NEVER spray water on a hot heat exchanger. The resulting steam could cause personal injury.

A cross-flow radiator is used on all models. Tanks in this type of radiator are located to the right and left of the core. Radiators have an oil cooler with inlet and outlet fittings for transmission fluid circulation.

Core and Tanks

The core is made of aluminum and is of the crossflow design. It utilizes large tubes that resist plugging. Repairs to the tubes and core are not recommended for service.

The core is attached to the tanks by clinched tabs on the core that cannot be bent back. If the tank or core is at fault, a complete radiator must be replaced. Refer to Radiator Replacement in Engine Cooling.

Transmission Oil Cooler

The transmission oil cooler is located in the right hand side of the radiator side tanks. The oil cooler cannot be replaced. Refer to Radiator Replacement in Engine Cooling.

Engine Oil Cooler

The optional engine oil cooler is mounted inside the left tank with inlet and outlet fittings for engine oil circulation.

Drain Cock

The aluminum/plastic radiator utilizes a one-piece plastic drain cock, with a rubber hose attached for easier draining.