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2005 Cadillac CTS 3.6L No Start, No ECM communication
Posted to GM Driveability on 10/14/2022 5 Replies

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 bulletin regard...

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  Related Documents & Media  2005 Cadillac CTS

 
Message Closed w/FIX

car Vehicle Data

2005 Cadillac CTS

VIN 1G6DP567X5
Engine3.6 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsNo Start, No ECM Communication
OccursAfter Sitting

Trouble Codes

U0100Lost Communication With PCM
U1000Class 2 Communication Malfunction
Message Closed w/FIX

car Vehicle Data

2005 Cadillac CTS

VIN 1G6DP567X5
Engine3.6 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsNo Start, No ECM Communication
OccursAfter Sitting

Trouble Codes

U0100Lost Communication With PCM
U1000Class 2 Communication Malfunction