location of a transmission control module for a 1999gmc pickup
got 2 trans put in truck same thing no 3&4 gears so had one rebuilt same thing put new
3 4 clutch pack new 3&4 shift s. new valve body same thing no 3&4 gears so i pulled it
out again when put back in it will be the 5th time also a new down shift s.
The engine and tranny are controlled by the PCM under the hood on the drivers side.
What did it end up Being wrong with trans
found bad yellow wire on 4 pin connector going into computer on transaxle , you have to remove that drive shaft for hand clearance
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