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Escalade EXT
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Data Communication System
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DTC U0074
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Diagnostic Fault Information
Diagnostic Fault Information
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance
PTLAN +
U0074*
U189A* **
U0074*
-
PTLAN -
U0074*
U189A* **
U0074*
-
* Other modules/DTCs will set with this fault.
** An open between the on either PTLAN circuit may also cause a DTC U0074.