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 number below refers to the step number on the diagnostic table.
- 3: The PCM must have the correct part number for the specified application.
DTC C0279 (W/O JL4)
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the ABS Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - ABS (W/O JL4) or Diagnostic System Check - ABS (W/JL4) |
| 2 |
|
Go to Step 3 | Go to Diagnostics Aids |
| 3 | Verify the correct PCM is installed in the vehicle. Does the vehicle have the correct PCM? |
Go to Step 4 | Go to Step 6 |
| 4 | Use the scan tool in order to read the Calibration IDs of the PCM. Are the PCM Calibration IDs correct? |
Go to Diagnostics Aids | Go to Step 5 |
| 5 | Perform the set up procedure for the PCM. Refer to Service Programming System (SPS)
in Programming. Did you complete the action? |
Go to Step 7 | - |
| 6 |
IMPORTANT:
Perform the set up procedure for the PCM. Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement
in Engine Controls - 4.8L, 5.3L, and 6.0L.Did you complete the replacement? |
Go to Step 7 | - |
| 7 |
|
Go to Step 3 | System OK |