location of a transmission control module for a 1999gmc pickup

Asked by Feb 05, 2015 at 07:26 AM about the 1999 GMC Sierra 1500 SL 4WD Standard Cab LB

Question type: Maintenance & Repair

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.

2 Answers

9,345

The engine and tranny are controlled by the PCM under the hood on the drivers side.

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What did it end up Being wrong with trans

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