Same motor, probably in the tune. What year model is it?
Mine is a 2000 motor with 300 hp.

Quote Originally Posted by LSx S-10 View Post
Hey guys i have a s10 i put the 4.8l in and recently got a 6.0 LQ4 for it...well doing some research i was wondering what was changed between the motors to give the yukon xl2500's 20 more HP then a silverado if its the same motor??? different cam? tune? heads?