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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 637 (Heating, Ventilation And Air Conditioning) >> Diagnostic Information & Procedures >> Air Conditioning (A/C) System Performance Test >> Test Description

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.

  1. This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
  2. This step measures the performance of the A/C system.
  3. This step is to allow for vehicle variations as well as high ambient air temperatures.
Fig 1: A/C System Performance Test (Step 1)
G01666397Courtesy of GENERAL MOTORS CORP.
Fig 2: A/C System Performance Test (Steps 2-5)
G01666398Courtesy of GENERAL MOTORS CORP.
Fig 3: A/C System Performance Test (Steps 6-8)
G01666399Courtesy of GENERAL MOTORS CORP.
Fig 4: A/C System Pressure - Zone Classification Chart
G01666400Courtesy of GENERAL MOTORS CORP.
Fig 5: A/C Performance Table
G01666401Courtesy of GENERAL MOTORS CORP.
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