Why won't it shift from reverse to park? - 1996 GMC Jimmy

https://www.youtube.com/watch?v=0dc60wMwh2I

https://www.yourmechanic.com/question/car-transmission-stuck-in-reverse-shifter-stuck-in-park-car-won-t-start-by-clayton-s

go to the given link get the manual with diagram and solve the problem your self http://toolsnyou.com/

For car not changing gears and not shifting out of park mode ,it can be shifter assembly issue, or it can also be transmission issue. Get the shifter assembly inspected with ignition OFF.

For more troubleshooting, I suggest you to get the Following help link checked, its complete step by step procedure to inspect gear shift issues: -----

GEAR SHIFT ISSUES

http://alltypesofpartsreplacing.blogspot.com/2012/11/gear-shift-issues.html

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NO REVERSE ON TRANSMISSION
http://alltypesofpartsreplacing.blogspot.com/2012/12/no-reverse-on-transmission.html
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Transmission fluid leak, transmission gears slip,
http://alltypesofpartsreplacing.blogspot.com/2012/12/transmission-fluid-leak-transmission.html
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These will help.

Thanks.

Could be the brake switch or the solenoid that locks the shifter in park.
That circuit would need to be tested.

Broken shift cable ?
If the neutral safety switch is on the transaxle and the cable is broken, the switch could still be in the reverse position.

make sure you have a good cable shift , good luck and let me know .

Something with the shift linkage is messed up.

Hi, you have a malfunctioning brake/park interlock. When you go to shift out of park, as you know, you have to hit the brake or the shifter won't jump out of Park into Reverse. The interlock device that in this system is probably failing.

My Grand Marquis shift indicator offset. Car was stuck in reverse/neutral/drive. Had to take the bottom of dash apart where pedals are and tighten a couple of torx screws.

It has a brake-transaxle shift interlock. You should just push the brake in to shift, but if you have done that, and it still won't shift, with foot on the brake, push the shifter all the way into park. Sometimes they don't always go into park all the way. Also if you park on a hill, it puts pressure on the btsi, so you cant shift it. Have someone push the vehicle back, just enough to take the pressure off and it should shift. I had this happen to me with my Grand Am.