Transmission not going into reverse?

MICKIEME

MEMBER
2002 GMC SIERRA
V8
2WD
AUTOMATIC
110,000 MILES

This truck has been meticulously maintained and has never had any issues except last year when we thought it ran out of gas but ended up being a fuse. It's been running perfectly, but I haven't driven it for a week and all of a sudden, it's not going into reverse. It feels like it's neutral and the R is blinking. We've never seen this before. It will drive forward but extremely sluggishly. Told a transmission fuse. Would you agree?

Saturday, June 7th, 2025 AT 11:33 AM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
51,610 POSTS

This could be, but it sounds like a shift solenoid is stuck open or not working. We need to run the codes to help guide us to the problem. Here are instructions on how to do so. You can get a code scanner from Amazon.

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

Good scanner - https://amzn.to/3FstLYg

Here is a guide to help you test the fuses:

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

Test the fuses with the key on. Please let us know what happens.

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Sunday, June 8th, 2025 AT 12:07 PM