I have a 2013 gmc yukon and it is stuck in drive mode. It...


I have a 2013 gmc yukon and it is stuck in drive mode. It still starts up. No matter which gear I'm in it goes forward. In park it goes forward. I put it in reverse my back light come on but it still goes forward. Neutral it goes ...

I have a 2013 gmc yukon and it is stuck in drive mode. It still starts up. No matter which gear I'm in it goes forward. In park it goes forward. I put it in reverse my back light come on but it still goes forward. Neutral it goes forward. I'm seriously confused Mechanic's Assistant: Just to clarify, what are the exact lights you're talking about? The white lights that comes in when you put your vehicle in reverse Mechanic's Assistant: Are you fixing your Yukon yourself? What have you tried so far? I checked to see if the linkage was broken. Look good Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? That's it.

Automotive Expert
Thanks for using JustAnswer.com! My name is \*\*\*\*\* \*\*\*\*\* I'll try to answer your car questions. I'll start off with some basic checks to do, then we can get into more advanced diagnostics if needed. Let me know if any questions come up, or if there is anything I can do to help! You can update this message at anytime. - I'm sorry to hear about any troubles with the vehicle, but would be glad to try and help! - Which engine/transmission is in the vehicle? Are there any trouble codes setting in any of the modules?

It a 5.3 engine don't know about the transmission
Automotive Expert
Suspecting valve body issue or sticking band. Has fluid level and condition been checked? Are there any codes setting in the transmission module?

No code I'm stuck in a parking garagefluid has been checked. We're would I be looking for this codeEvery gear I go in it only goes forward. Even with the truck not started but in gear it won't even roll back
Automotive Expert
Roger that, I'm sorry it's acting up like that. Might recommend to have a mobile mechanic come out and scan for trouble codes in the transmission module then check transmission line pressure. If tools aren't available for diagnosis, recommend having vehicle towed to local transmission shop for diagnostics. Might try resetting transmission module by disconnecting both battery cables and touching cable ends together for 2 minutes. If still stuck in drive gear a that time, continue with scan tool and line pressure diagnosis. Replace valve body if seeing valves sticking, check balls worn. Inspect band and clutch pack operation if no issue seen with valve body. Lemme know what I can do to help!

Okay I will
Automotive Expert
Sounds good, hoping that helps to figure out what's going on! You can update the message at anytime, and I'll get back to you asap! Lemme know how it goes, or if any questions come up while checking things out! Thanks again for using JustAnswer.com!

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