I have a 21 Tahoe and the “D” on the Electronic Transmission Shift Control Pushbutton has pretty much disintegrated and you have to mess with it for 10-15 minutes to get it in drive. After a lengthy search I found the part but can’t find a dealership that will tell me they can install it. Most tell me they have never done that before and will have to get back to me - never do. Or they say it takes all kinds of programming to install and don’t want to do it. Has anyone had this issue ? Any advice on where to get this installed? Seems fairly easy if you know how to disassemble the dash. Any advice appreciated.