Ive had only 4X4 trucks since 1973 and never had a failure. That being said, I have a 2018 GMC Sierra 1500SLT with the 6.2l and 4X4 and unless something ever happens to this truck ,,, it will be my last. Best truck I have ever had hands down. Plus this is the first new truck I ever bought because when i test drove it i fell in love with it. I have a CAI and simple exhaust work done as well as a Diablew Tune and on the highway traveling I can get 22-24 mpg which is much better than the last Chevy I had with the 5.3. Just my $.02 but maybe will help you to decide. Good luck in your decision.