Just curious…. After reading an [old] article in GM Authority about new towing features on the 2014 GMC Sierra trucks, was wondering IF these type of vehicle improvements get retroactively updated to a previous model year during a dealer service visit/connection?
In this example: Transmission features like “Tow/Haul” settings such as Hill Start Assist, integration with optional/add-on Brake Controller wiring, etc. on 2014 vehicles pushed to 2008 Yukon Denali 6.2l six speed trans.?
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