GM Service Manual Online
For 1990-2009 cars only

A deflector redirects air flow. Deflectors are installed under the vehicle and redirects the air flow beneath the vehicle to flow through the cooling system. The deflectors perform the following functions:

    • Reduce drag
    • Prevent front end lift
    • Increase radiator cooling

Air baffles are used to direct air into the radiator and A/C condenser. Air seals ensure that air passes through, and does not bypass, the radiator and the A/C condenser. A missing, damaged, or incorrectly installed baffle or seal may cause the engine to overheat.