Down to the same. Hell, it could even get better since your 4.8 revs up more often to get your tank moving...
my in-town mileage went from 14 to 16 when i swapped from the 4.3 to the 5.3 and only went down by 1 on the interstate.
Originally Posted by cjriojas
...And everyone quit telling him to get a high stall torque converter. He wants an offroad/onroad truck. Like casey said, anything higher than a 2800 stall tc will hinder performance.
sorry... i'm still learning about auto stuff. i drive a man's transmission
00 FRC - just top end, exhaust, and a hot-air intake
99 Sierra - 5.3 / 5spd
↓ click the pic for the build ↓