Troubleshooting ~ November 9, 2021 GMC Sierra Heavy Duty (2500/3500) horn not working – causes and how to fix it The horn is an important safety feature in your GMC Sierra HD. Driving your vehicle with a broken horn can …
Tips & Tricks ~ October 2, 2021 Remote start GMC Sierra 2500/3500 HD with key fob or mobile device GMC Sierra 2500/3500 Heavy Duty supports remote start feature that allows you to remotely start the engine of your vehicle …