# C0550 on the 2004 Oldsmobile Bravada

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name C0550

- [10004367](https://open.wenmarpro.com/bulletins/10004367), 2003-12-04: SERVICE 4WD LIGHT ON, 4WD INOPERATIVE, HARSH ENGAGEMENT OF 4WD, NO COMMUNICATION WITH TRANSFER CASE CONTROL MODULE \(TCCM\), TCCM DIAGNOSTIC TROUBLE CODE \(DTC\) C0550 SET. \*TT
- [10003863](https://open.wenmarpro.com/bulletins/10003863), 2003-11-05: THE SERVICE FOUR\-WHEEL DRIVE LIGHT OR THE FOUR\-WHEEL DRIVE IS INOPERATIVE WITH NO COMMUNICATIONS WITH THE TECH 2, OR C0550 CODE IS STORED IN THE TCCM. \*TT