2020 GMC Sierra 1500 AT4 CARFAX One-Owner. Clean CARFAX. **Eligible for a 100,000 mile Hennessy Certified Warranty!**, **Local Trade-In!**, **Nationwide Delivery Available!**, **We pay top dollar for trades!**, **Call now for details!**, 4WD, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 12-Volt Rear Auxiliary Power Outlet, 170 Amp Alternator, 2 USB Ports, 2 USB Por...