I have put over 300000 miles and never touched the inside of the motor. 5.3 i think. It gets 18 mpg. I have a 345 rear end, auto. Used both in construction work and pleasure. Has been an excellent pickup, and still looks good. Did replace transmission @ 235000.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.