Question about 1999 GMC Jimmy
Not shifting 1-2- gerr
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Posted on Jan 02, 2017
P0753 means your powertrain computer detects a continuous open, short to ground or short to power in the circuit to your transmission's 1-2 shift solenoid. When the code is active, your transmission runs in a fail safe/limp home mode that only lets certain gear ratios function in the transmission.
The solenoid in your application looks like this
and it is located sometimes on the side of the transmission, but my guess is from the looks of it, it might be found inside the transmission, only accessible with the oil pan removed.
The problem might be the solenoid itself, or the wiring going to the solenoid from the computer that controls the transmission, or the computer itself.
Posted on Sep 09, 2009
not sure if this is the answer yet but i have the same problem with the same codes i work at an auto parts store and a few of the techs that are customers have lead me in the direction of changing the ignition switch, i am doing it today will let you know if it solves the problem
Posted on Jan 27, 2010
it turned out to be the stall in the converter. i needed to install a low stall and the code never came back.
Posted on Mar 16, 2010
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