Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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

2) - The DTCs listed may set, if there is a concern with the actuator, when a calibration of the actuators is performed.
3) - Ambient air temperature must be above 3°C (38°F) in order for this A/C compressor test to be run.
4) - Misaligned air baffles will cause poor A/C performance at idle and low speed operation.
6) - The specified values are from the A/C System Performance Test.
8) - This action ensures that the internal fan of the inside air temperature sensor assembly is providing air flow across the internal sensor.

Fig 1: Too Hot In Vehicle Diagnosis (Steps 1-6)

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Fig 2: Too Hot In Vehicle Diagnosis (Steps 7-13)

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Fig 3: Too Hot In Vehicle Diagnosis (Steps 14-25)

Courtesy of GENERAL MOTORS CORP.