Since the 2005 model year, all BCM’s (Body Control Modules) are programmed from the factory to lock all doors when the transmission is shifted into gear or vehicle speed is greater than 8 mph (13 km/h). There is no option to disable the auto door locks from the factory, but if an owner wishes to have the auto door locks disabled the following procedure can be performed: 1. Use the following procedure to disable the auto door locks on the models listed below: 2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT 2007-2008 Chevrolet Avalanche, Silverado (new body style), Suburban, Tahoe 2007-2008 GMC Sierra (new body style), Yukon, Yukon Denali, Yukon XL, Yukon Denali XL Reprogram the BCM with updated calibrations currently available in Tis2Web. In some rare instances, the calibrations may not be available in Tis2Web and Techline Customer Support should be contacted to obtain the calibrations. When at the “Calibration Selection” screen in Tis2Web, select “locking” (should be highlighted in Red) and pick the calibration listed as “(Per Customer Request Only) Auto door locks off, option no longer in DIC”.