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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 799 (Suspension Control System - Suspension Leveling) >> Diagnostic Information and Procedures >> Diagnostic System Check - Automatic Level Control >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. 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. 2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
  2. 3. Check for the presence of DTCs.
  3. 4. The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
  4. 5. Check for the presence of DTCs in Body Control system.
  5. 6. Check for the presence of DTCs in Automatic Level Control system.
    Fig 1: Diagnostic System Check - Automatic Level Control Chart
    G01455588Courtesy of GENERAL MOTORS CORP.
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