There's a GM bulletin about this. It's new and most dealers don't know yet. Bulletin # 1758125 and needs reprogramming.
Document ID# 1758125
Passenger Door Courtesy Light Remains On - keywords BCM body calibration interior lamp module PDM program reprogram right stay wire #PIT3800B - (02/01/2006)
Models2006 Cadillac Escalade, Escalade ESV, Escalade EXT
2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2006 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL
2006 Hummer H2
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customers may comment that the passenger door courtesy light remains on after all other interior lights have gone off
. Root cause is the PDM missed the class 2 message to turn off courtesy lamp.
To correct this concern reprogram the DDM (Drivers Door Module) with an updated service calibration. This new service calibration was released with TIS satellite data update version 1.5 available January 23, 2006. As always, make sure your Tech 2® is updated with the latest software version.