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Thank you 🩷 This turned out to be my issue!!

By some chance do you happen to know the name of this part in case I have to buy it?

I’m sorry I got my oil in your connector. 😂

Ese cable. Cual es su trabajo en la caja

Im having an issue where she goes into drive but will not go into reverse, gonna try this tomorrow, hoping its the problem, never had any of this happen until a few weeks ago with a -35 feels like temp and my truck geled up and two new batteries later

What code

So where is the oil coming from that is leaking into these plugs?

What headlights and mirror brands? Good looking truck.

My LB7 sat June and July. Mid July, I go drive it, and the ABS and Park Brake lights are on, and it's displaying Service Brake System. I tried driving it, it wouldn't shift to second. It would just go to neutral and then display Range Shift Inhibited, but no codes thrown or stored. I checked what was covered in this video, and then I bled the brakes. The passenger rear passed some bubbles, and the rest had no bubbles. This cured it, I started it, and there no lights on the dash, and everything is fine once again.

WOW! YOU FREAKING ROCK FOR THIS VIDEO! THANKS!

You probably will need to replace the internal harness if it’s full of tranny fluid

You need to replace the internal transmission harness or this will just happen again because the trans fluid is leaking out of that connector

If there's atf in the connector, it's due to the internal seal in the plug failing. Cleaning it is only a temporary fix. You can either replace the whole internal trans harness or you can buy the seal part of the plug separately.

Dude I had issues with my duramax thanks for your video. It fixed mine. For now 5/26/23

So my 04 is doing this shit I cleaned the plug didn't help I have a new nsb switch about to put it on also got a new ignition switch but do you have to reprogram the ignition switch or is it a plug and play item thanks in advance bub

Good job

How did you take that plug out

awesome thank you so much! my lbz did this for the first time yesterday

Thanks for this video, one of my plugs on the driver side was not firmly connected. It took me a few seconds to get it back in place, it resolved my transmission issue not releasing last gear and weird shifting.

First of all Jai - Thanks for posting this vid - Super helpful. I will try and answer the question about how you get the plug off. Mine was coated in grime so first thing I did to see what's what down there I fully cleaned it by spraying simple green, scrubbing with a toothbrush and rinsing with water until all of the plug part was clean. The plug is actually the female part while the male part is attached to the transmission so the plug slips over the part attached to the trans and clicks in. Once it was all clean and I could see what's going on I inserted a 1" wide gasket scraper (a large flat blade screw driver will also work) in between the trans and where the bottom/end of the female plug almost meet, there is about a 1/16 gap. With one hand I grabbed the plug and pulled while I twisted the gasket scraper to help push it off from the bottom of the female plug part. It popped off without to much effort and it was full of transmission fluid. I disconnected the batteries and then spayed both plug and the pins on the trans side with electrical cleaner - I used a lot almost a quarter of a spray can and using the spray straw. Once I was sure both sides were clean and dry I put some silicon caulk into the small hole on the top of the female plug to keep fluid from entering there in the future. I added some dielectric grease to the female plug connectors and re attached. If I could have posted pictures here to show the plug parts I would have but I guess its not allowed.

thank youfor the help clean looking dirtymax

Have an 2006 2500HD. Got the range shift inhibited read out the other day. Boat load of rain the last couple of days and a buddy mentioned moisture possibilty on some plugs/clips. Thanks for vid and tips.

are there any clips on this plug or do u have to turn it? i cant grab mine off and i don’t want to break it.

So many people have went and bought entire new transmission over that first plug you showed its insane.

Thank you bro you save my day

Hey I have the same problem with my duramax truck u think it will b so much better if I buy the new plug harness n just replace it

Beautiful. How much was the job?

If the pass through connector is full of ATF I hope you replaced the harness with a new one. That's how we took care of the issue at the dealership. Otherwise it will happen again. You don't want that.

Jai, Thank You, Thank You, Thank You!!!!!!!!!!!! My plug was full of tranny fluid, we'll see how long it lasts, I think the seal at the plug needs to be replaced. But, yea I think this has been a long time problem with the spastic shifting its had since I bought it 6 years ago used. I was really worried. Thanks again!

Hey partner thanks for the video. I'm currently having this issue but my R in the dash cluster is blinking,could this be the same issue? Never had a tranny issue with this truck just happen out of the blue.

thanks dawg

I’ve tried all of that on mine. Wonder if I should get an ignition switch from GM first. My TCM has been reflashed one time before. Any input would be great.

Jai agree with Brandon we owe you for this great find - I Have a 2009 - 2500HD - Same issue as all. Cleaned the plug as you said, full of oil. It came back in 2 weeks with the shift Inhibit again. The cause was the wiring harness in the transmission. The seal was letting the oil into the plug. $ 360.00 new harness plus labor it's running awesome. I have seen mileage at 20 mpg and smooth running. It was causing a lot of little issues, rough idle, sluggish performance, weird shifts all of it comes back to this wiring harness. THANK YOU !!!

What year?

Man im trying to figure out what’s goin on with my rig and I wanna try this but I cant even figure out how to get the plug off to clean it. Any video or help there ?

Bro sweet

*** unfortunately once the cold weather hit I am getting the "shift range inhibited" again and wont allow me to shift. I have an 05 Duramax and I have on off "shift range inhibited" issues for the last 4 years. I have a company truck I never messed with it much. Everything online until this video showed replace the nsbu switch so I did a few years ago. Well today I drove my truck for the first time in awhile and it just wouldn't move after 30 yards. Watched this video, cleaned up plug and BAM! Fixed a 4 year old issue in 5 mins. I'm gonna spray it with dy electric spray just to give it a better seal now.

Thanks man for the tips fixed my truck

Great work

How's that wall today by the tree standing.. seems close

thanks man I have been fighting with my 04 for 3 months

I am replacing the whole wiring harness in the transmission. The plug was leaking and after I cleaned it all out, it worked great for 2 days and then the problem started again. Parts will be in today.

I want to echo what @brandon bogle just said. You saved my ass. filthy oil plug. Much love Jai!

To fill in the void and the difference in elevation, did yall use the soil to bring up to grade? Or did you bring in more base course material and compact it in layers?

Just gorgeous work! I’m curious what you used for your bedding layer on this project? Keep up the amazing work. I will definitely share this video!

Great video, I have a question, did you was your deck 1st, did get all the dirt and grind off before you put the stain sealer down? Thanks

Clean truck man!!! What tires you running on that beast?

Can you tell me what Cain of tools did you used to removed the plug? I’ll appreciate it.thx

Great job!! I have to build taller wall of around 5.5 feet and 30 feet long . I am going to have grass instead of paver stone in whole area for now. Can the leveled area be flat like the one’s you have with paver. ?

I'll be checking mine tomorrow. Thx so much bud. This old dad really appreciates it.