Buying an used car doesn't have to be a cause for worry. Casa fully inspects all the vehicles that make it to our lot, so we stand behind them. 7-Day Cash Back Promise A vehicle is a big purchase, and we want to make sure you make the right choice. If you don't love your pre-owned Casa vehicle, bring it back within 7 days and find the one you do love. Clean CARFAX. Summit White 2019 GMC Sierra 2500HD Denali 4WD 6-Speed Automatic HD Electronic with Overdrive Vortec 6.0L V8 SFI Flex Fuel VVT Features: NonSmoker, Leather, Low Miles.Recent Arrival!