GM Service Manual Online
For 1990-2009 cars only

Some vehicles may experience odors emitted from the air conditioning system primarily at start up in hot, humid climates. This odor may be the result of debris in the heater and evaporator module or microbial growth on the evaporator core.

A single application of the Goodwrench Air Conditioning System Deodorizer will remove odor from the air conditioning system.