While engine is running transmission will not shift into gear

2008 PONTIAC GRAND PRIX
150,000 MILES • 3.5L • V6 • 2WD • AUTOMATIC
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LONELYBEAR56
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I start my car and it won't go into gears at all while running.
Sep 4, 2021 at 8:41 PM
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SQM
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 6,383 POSTS
Hello,

Just to clarify, the shift lever is stuck in park?
This could be an issue with the shift interlock. It is what allows you to shift out of park after the depress the brake pedal.
The shift interlock actuator is located under the shift lever (see diagram).
Sometimes the connectors can come loose of the actuator and can cause issues as well as it can be a faulty actuator as well.

Do you hear any clicking noise when you apply the brake to shift out of park?

https://www.youtube.com/c/2carpros/featured

Please let me know little bit more details.
Thank you.
Sep 4, 2021 at 9:18 PM
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LONELYBEAR56
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Sorry, when I put the car in all gears, won't go reverse or forward while running.
Sep 5, 2021 at 7:56 AM
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SQM
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Got it. So when you put in drive it does not engage right?
Can you feel the transmission engaging?
If you put in drive does it act like it is in neutral and rolls?
Sep 5, 2021 at 9:57 AM
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LONELYBEAR56
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Car starts and idles, when put into gear, nothing happens, as if in park or neutral, does not do anything at all!!
Sep 5, 2021 at 3:31 PM
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SQM
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 6,383 POSTS
Got it.
It sounds like the issue with with the shift selector cable. That geos from your gear shifter to the transmission. It could be broken or could have came off of the bracket. So when you put it in drive or reverse it is not selecting the desired gear.
It could just need an adjustment.
In order to access that cable you will have to remove the center console.

I have attached the replacement and adjustment procedure below.
Let me know of any questions.
Thank you.
Sep 5, 2021 at 8:10 PM