1999 GMC Jimmy 4X4 wont shift in overdrive

MartyDufrene

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I got a code 7053. Shift A solenoid
The truck wont shift into overdrive. Is it the 1-2 or 3-4 solenoid and can it be reached by dropping oil pan and just unlatching remover n replace? or is it on the side the trans.
HELP ME PLEASE
 


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