GM Service Manual Online
For 1990-2009 cars only

Core

A lightweight tube and fin aluminum radiator is used in this vehicle. The air circulating between the tubes is directed by the fins to lower the engine coolant temperature (ECT) as it flows through the tubes.

Tanks

The radiator has upper and lower tanks. The upper tank is utilized to increase the capacity and ensure sufficient supply of coolant in the radiator to cool the engine as necessary. Transmission fluid cooler pipes run through the bottom tank of the radiator to cool the transmission fluid (automatic transmission equipped vehicles).

Drain Plug

The drain plug is located at the lower left of the radiator on the rear side. It is an open/close system which allows drainage of the engine coolant from the radiator.