Terrific Value if You Buy Used
I purchased a two year old 2015 Z71 SLE Crew cab with the 5.3L and it has been a remarkable truck to date. My best mileage has been 22.3mpg. I also tow a travel trailer and best mileage has been 13mpg. If you are looking for 35 mpg then do not buy a truck. I have added an extra leaf spring done through a local spring shop, which has not changed the ride characteristics but does help with cornering and towing (no more sag). I have replaced the halogen headlights with new LED bulbs which have made a huge difference in night driving, and replaced On-Star with an IO5-IO6 upgrade giving me a GPS navigation system. I do most of my own maintenance so the majority of add on items I have done myself. With a tonneau cover, the bed lighting is a nice feature. The tow package, automatic 4w drive for bad weather, dual climate control, reliability, comfort, performance, remote start, Bluetooth features make this a keeper. Some reviewers say it has recalls, I don’t know how that is an issue. All were done at my local dealership at no cost, I don’t know of many vehicles that have been recall free. I also purchased a rear under seat storage box. GMC should have it as a standard item. The 5.3L engine has a light ticking sound, but I understand that is characteristic to all of them and may have something to do with the cylinder deactivation, and it doesn't bother me. The Sierra is comfortable, quiet and so to date has been dependable. At my age I don't see any more new vehicles in my future; I intend to keep this truck until I can’t drive any longer. I may just put in another engine if it comes to that. I can’t say anything bad about it. Hopefully it will continue to perform well for a long time to come. I have changed the transmission fluid, antifreeze, hydraulics . . . fluid changes are crucial to the longevity of any vehicle and for what prices are these days for new trucks, my used Sierra is worth every cent to keep it road worthy. Compared to a Chevy Silverado I once owned, the GMC Sierra is like changing from a suit into a tuxedo. Lots of comments on the looks, smooth ride and fun to drive. After the last big snowstorm the 4x4 traction is unbelievable. It is a keeper for sure.