All transmission gears work except D?

2007 CHEVROLET SUBURBAN

150,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC

LJMCTYER

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Hi,

When you put it in Drive it just revs, doesn't move. Replaced the solenoids in the transmission and tried a new TCM but same issue. Any ideas on what it is? Thanks

Mar 9, 2023 at 9:26 AM

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When you put the transmission into drive, does the "D" light up on the dash? If not, then the gear range sensor needs to be replaced. Have you run the codes to see what comes up?

Here is a guide to help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also check the fuses# 34, 19 and 14 in the under-hood fuse panel. I have included the transmission wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Mar 10, 2023 at 8:09 AM