I bought an 03 GMC 4X4, CC, SB with 19K miles about a month ago and love it. i'm getting ready to change the oil for the first time and would like to know what is the best oil to use?


I am also getting ready to juice the truck and was wondering, just what trans mods i need to have done if i go beyond the juice?

i run rotella for the oil and have a suncoast tranny.if you dont go over the 90 juice stock will do just fine

mobil 1 in the tranny

for a mild hp upgrade like a 90hp juice in a fresh tranny the ATS copilot kit is a good upgrade and it installs w/o pulling the tranny

http://atsdiesel.com/products/products-gm-transmission-valvebody.htmlEdited by: mtomac

I wonder what the affect of NOT adding a beefier Torque Converter with the Co-Pilot install ,would be ??


In other words your only getting partial results ... No ??








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