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Garage Door Opener Transmitter Replacement

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Yukon XL, 2015 GMC Yukon, 2015 Chevrolet Tahoe, 2015 Chevrolet Suburban, and 2015 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Garage Door Opener Transmitter
GM3256780Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
Preliminary Procedure 
Remove the roof console opening trim plate. Refer to Roof Console Opening Trim Plate Replacement .
1 Garage Door Opener Transmitter Fasteners (Qty: 2)
CAUTION:

Refer to Fastener Caution

2 Garage Door Opener Transmitter
Procedure 
Refer to Control Module References for programming and set-up procedures.