GM Service Manual Online
For 1990-2009 cars only

Radiator Assembly Description Radiator

This radiator uses an aluminum core with plastic core tanks. The lower core tank houses the transmission oil cooler, if equipped. The drain cock is located in the lower tank. The drain cock is serviceable.

Radiator Assembly Description Core

The core is made of aluminum. The core is the downflow design. The core uses large tubes that resist plugging. The core attaches to the side tanks by clinched tabs on the core. Replace the core under the following conditions:

    • More than three tabs are broken on one side.
    • Two adjacent tabs are broken.

Radiator Assembly Description Tanks

The tanks are fastened to the core by clinched tabs. Clinched tabs attach to the sides of the core. The clinched tabs may bend backward in order to remove the tank from the core if necessary. Bend back the tabs only enough in order to remove the tank. Overbending weakens the tabs.

A high temperature rubber gasket seals the mating surface between the core and the tank. Replace the gasket when removing a tank from the core.

Radiator Assembly Description Drain-Cock


Object Number: 198896  Size: SH

The aluminum/plastic radiator uses a two-piece plastic drain cock and a rubber seal. The drain cock is serviceable.