GM Automatic Transmission Shift Lever, 2015-2019 LML/L5P

Fits: 2015 thru 2019 Chevy Silverado/GMC Sierra 2500HD/3500HD LML/L5P Duramax Diesel

The main cause of the tow haul button not working is a broken tow haul switch or wire in the shift lever.  Replace the broken or worn out shift lever with this new Genuine GM shift lever.