this is actually for my 99 silverado but it lags when tring to shift and now its not shifting into od.it all started as being a lag from 1-2 i had to let off to get it to shift into second.i still have to but now theres no od.now i know the code is shift solenoid A performance or stuck off but what the hell does that mean?something as stupid as a solenoid or is it F.U.B.R. ??? thanks