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Auxiliary Step / Running Board Module: Customer Interest
Body - Power Running Boards/Assist Steps Inoperative

Bulletin No.: 07-08-61-004

Date: March 12, 2007

TECHNICAL

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

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.

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 the table.

Disclaimer

Relays and Modules > Relays and Modules - Body and Frame > Auxiliary Step / Running Board Module > Component Information > Technical Service Bulletins > Customer Interest for Auxiliary Step / Running Board Module: > 07-08-61-004 > Mar > 07 > Body - Power Running Boards/Assist Steps Inoperative

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