Test Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Yukon XL, 2004 GMC Yukon, 2004 Chevrolet Tahoe, 2004 Chevrolet Suburban, and 2004 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 in the diagnostic table.
- 2: Lack of communication may be due to partial or total malfunction of the serial data circuit. The specified procedure will determine the particular condition.
- 4: The presence of DTCs that begin with a "U" indicates that some other module is not communicating. The specified procedure will compile all of the available information before tests are performed.
Diagnostic System Check - ABS (W/O JL4)
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Install a scan tool. Does the scan tool power up? |
Go to Step 2 | Go to Scan Tool Does Not Power Up in Data Link Communications |
| 2 |
|
Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications |
| 3 | Use the scan tool in order to display DTCs for the following control modules.
Does the scan tool display any DTCs for the control modules listed above? |
Go to Step 4 | Go to Symptoms - Antilock Brake System |
| 4 | Does the scan tool display any DTCs that begin with a "U", DTC C0290-C0292 or C0297? | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications | Go to Step 5 |
| 5 | Does the scan tool display DTC P0500, P0502, P0503, P0562, P0563, P0601-P0607, P1381, P1621, P1627 or P1683? | Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 4.8L, 5.3L, or 6.0L or Diagnostic Trouble Code (DTC) List in Engine Controls - 8.1L | Go to Diagnostic Trouble Code (DTC) List |