I have a 2002 Suburban and i just did a tranny service and now i have no acceleration. Reverse works fine its just when i put it into Drive.

 

What was the condition of the old fluid? How did it smell? Burnt?

 

If you have never changed fluid don't do it. To change fluid it must be done at scheduled intervals. if you wait a 100,000 miles it is to late to change the fluid. The fluid that is in the their prior to changing has metal grindings and you transmission has gotten use to running with that kind of fluid. Trust I found out the wrong way. If you did a rebuild take it back and have them fix it. If you just had a fluid change or (hope not) a transmission flush, look for a new transmission.

 

when you put the pan back on did hit or mess up one of the shift solenoids?