what transmission does my truck have the 4l60 or 4l65 im thinking about buying a stall and i was also wondering does a stall when im cruising are my rpms going to be higher or be about the same its a stock trailblazer stall any info will help thanks

 

should be the 4l60E..

 

Thats What I Was Thinking But I Know For Sure I Looked At It And Usually It Says It On It But It Didnt

 

it is a 60 and the stall will not change the rpm once the verter is locked

 

good cause my dad would be pissed if i bought it and my gas mileage went down cause that is one of the only reasons i got the truck

 

For the gas mileage? what were the other options a peterbuilt or a freightliner?