I know the trans line adapters are different, what else has to be changed for the 04 trans to work in an 01? Thanks in advance for your input.
Isn't the bell housing different in an 01?
Did you read my post?
I ment the bolt pattern on the bell housing not the trans line fittings.
All light duty Chevy trucks have the same bolt pattern. They will match 1955 through 2015. Medium duty trucks will have the SAE bolt pattern.