Articulating Running Boards (Assist Steps) Inoperative (Reprogram Assist Step Controller)
| Subject: | Articulating Running Boards (Assist Steps) Inoperative (Reprogram Assist Step Controller) |
| Models: | 2007 Cadillac Escalade, Escalade ESV, Escalade EXT |
| 2007 Chevrolet Avalanche, Suburban, Tahoe |
| 2007 GMC Yukon, Yukon XL, Yukon Denali |
| Built Between November 15, 2006 and January 16, 2007 |
| (with Assist Step Controller P/N 25822021) |
Condition
Some customers may comment that the power running boards/assist steps on the vehicle operate intermittently at times or are inoperative. The running boards may stop in mid-travel and remain there until the next key cycle. DTCs B051C22 or B051D22 may or may not have set .
Cause
This condition may be caused by the software in the running board/assist step controller.
Correction
Important: Do not reprogram assist step controller P/Ns 25782667 and 25852622. These modules will not exhibit the condition.
Reprogram the running board/assist step controller, P/N 25822021, with the new calibration.
Important: Use the Pass-Thru method for programming this controller.
Reprogram the Assist Step Controller. Refer to Service Programming System (SPS) in SI for programming information, if required.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
R9731* | Reprogram - Articulating Running Board Controller | 0.4 hr |
Add | Diagnostic Time | 0.0-0.3 hr |
*This labor operation is for bulletin use only. It will not be published in the Labor Time Guide. | ||
