Service bulletin PIC4740F

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's summary

This Preliminary Information communication provides information to the technician for multiple concerns including service engine soon light, reduced power, no crank or start, multiple warning lights on, transmission shifts hard, or the door locks cycle while driving. The transmission control module or engine control module may not communicate with the scan tool. This could be caused by unseated pin or pins in the transmission connector. The technician should inspect the transmission connector X1 terminals by disconnecting it and carefully tugging on each wire to ensure the pins are fully seated. On the Cadillac ATS and CTS only the check the harness securing bracket on the passenger side of the vehicle were the transmission bell housing is attached to the engine block the harness should hang below the securing bracket. The harness should also be checked for chaffing.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Listing a model year does not mean every vehicle of it is concerned: the document says which.

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

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