U1000 Diagnostic Trouble Code Discussion for October 2022
Class 2 Communication Malfunction
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| Help Request | Posted | |
| 2005 Cadillac CTS 3.6L No Start, No ECM communication VIN: 1G6DP567X5 U1000: Class 2 serial data problem--in all modules. We thought we had a "typical" ECM failure on this CTS and had just repaired another 05 CTS with reman ECM a few days before this nightmare. Key on, no check engine light, no communication. Key stuck in igntion. We ran through the GM service bulleti... |
October 14, 2022 | |
| 2005 Cadillac CTS 3.6L No Start, No ECM communication VIN: 1G6DP567X5 U1000: Class 2 serial data problem--in all modules. We thought we had a "typical" ECM failure on this CTS and had just repaired another 05 CTS with reman ECM a few days before this nightmare. Key on, no check engine light, no communication. Key stuck in igntion. We ran through the GM service bulleti... |
October 17, 2022 |
