Test Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The step numbers below refer to the step numbers on the diagnostic table

3. This checks for A/C compressor clutch always on.
7. This test is to insure cooling system is operating normally.
10. The aspirator tube connects to the rear of the HVAC control module. The aspirator tube is used to draw air past the inside air temperature sensor.

Fig 1: Too Cold In Vehicle Diagnosis (Steps 1-9)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Too Cold In Vehicle Diagnosis (Steps 10-21)

Courtesy of GENERAL MOTORS CORP.