DTC U1001 To U1254: Module U1XXX Communication: Notes
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
DTC U1001-U1254
| Control Module | ID Number |
|---|---|
| PCM | 016 |
| ECM | 017 |
| TCM | 024 |
| EBCM | 040 |
| BCM | 064 |
| SDM | 088 |
| IPC | 096 |
| HUD | 098 |
| Radio | 128 |
| VIU | 146 |
| HVAC | 152 |
| MSM | 166 |
| Theft Deterrent Control Module | 192 |
When more than one Loss of Communication DTC is set in either one module or in several modules, diagnose the DTCs in the following order:
- Current DTCs before history DTCs unless told otherwise in the diagnostic tables.
- The DTC which is reported the most times.
- From the lowest number DTC to the highest number DTC.