[wyatt s1978]

how do i reset the tranny codes after im done installing nsbu?

 

[brokesmoke]

how do i reset the tranny codes after im done installing nsbu?

They should reset them selves after some driving. Or disconnect batteries for 10 mins to reset computer might do it if you don't knoe anyone with a scanner.

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[brokesmoke]

Updates?

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[wyatt s1978]

i think its fried. p0731 code. i cant seem to figure it out

 

[txroper2112]

I have had issues with "shift range inhibited" and tried replacing the ignition cylinder with no luck as well. My issue ended up being a bad tcm There is no way to find out if thats the solution to your problem unless you have a tech 2 plugged in. Might be stuck taking it to the dealer. Also check TCM connectors, Ive had issue with those as well.

 

[wyatt s1978]

ok thanks will update when done

 

[wyatt s1978]

i also lost cruise control

 

[wyatt s1978]

dealer said need a new tranny. Its just gonna have to sit till Ican get it built. thanks for all the help. Im glad we have this forum.

 

[Badasslady]

My 2003 GMC Duramax does the same thing. I have a good feeling it is a factory defect. Mine continues to do it and is costing me around $500 each time I take it in.

 

[Mike L.]

They should reset them selves after some driving. Or disconnect batteries for 10 mins to reset computer might do it if you don't knoe anyone with a scanner.

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Try not to post bogus info. They will not clear themselves and disconnecting batteries does no good.

 

[Badasslady]

I don't really want to disconnect the battery because I think it will remove all the info so it can not be scanned. I am getting tired of this message. Someone has to know what is causing this problem.

 

[Knuckledragger]

I have the range shift inhibited problem, with the blinking R and tranny will not shift into reverse. If I can get into D it will usually go away after I drive a short distance shut it off for a few minutes then turn it back on. Sure seems an intermittent electrical ghost gripe.

Will report back when I find something definite. I wonder if my Superchip controller will give me some codes as the check engine insignia stays lit most of the time

 

[Badasslady]

They have scanned mine everytime and have come up with nothing. I think GMC needs to look into this because I heave heard of it happening to a lot of durmax trucks out there. Frustrated...I spend 4-500 dollars everytime ot happens. Ready to trade my truck for something else. That is too bad because I love my truck

 

[U.P. Duramax]

I'm hoping it's the transmission switch on my 09 LMM. I had the same thing happen to my 05 LLY and it turned out to be the ignition switch.

This is a photo taken yesterday on my 09

 

[Badasslady]

Sweet, I will try that next time. Mine just flat shuts down and I can not go anywhere. Mine is an '03 with a little over 100k on it. I want to say after it hit 100k is when it started happening.

 

[frankbonaiuto]

my 09 is doing the same but only after long drives of 120 kms or more happened Saturday and when I shut it off msg came up and took few tries to get into gear then I had hard shifting from 1-2 2-3 fine on the highway, got home let it sit till Tuesday and drove like nothing happened but furthest I drove was 75 kms one way, today drove 120 kms and after I shut it off and went back same msg and even harder shifting and some slipping. off to dealer tomorrow, buddy said his did the same and it was tcm on his 2011 denali hd..

 

[Knuckledragger]

Yep

Sweet, I will try that next time. Mine just flat shuts down and I can not go anywhere. Mine is an '03 with a little over 100k on it. I want to say after it hit 100k is when it started happening.

That's when mine started intermittently causing problems. Doesn't seem to screw up permanently, so as to make T/S easier. I wouldn't abandon your truck just yet. According to the threads on this subject....it's mostly the IGN switch and NSBU that seems to be the problem on the trucks from our age range. So that means a part that's less than 100 bucks I think.

 

[frankbonaiuto]

24 hours later and $1000 bill I have a working truck again and a new tcm... glad to have it back but boy do they take advantage 3.5 hours of labour for 1/2 hour job... ah well

thanks for all the info

 

[curthal]

I've been having the exact same problem with my Chevy Silverado 2500 Duramax (2005, 240k miles). It started happening about 10 days ago and is getting worse. It almost always has trouble engaging in reverse after starting the truck. Often it won't engage in any gear until I restart the engine or shift into park and let it sit several minutes until I feel it "click" and engage. Then I can shift into reverse or drive and it is fine for as long as the engine remains running. Massey, did the problem go away when the dealer fixed the ignition switch voltage issue? Anyone else figure out what the main issue is and how to fix it? My truck does the same thing as many of you describe: Upon starting the engine, the truck won't engage in reverse, the small indicator line under the "R" blinks and the message center says, "Shift Range Inhibited". Also, when it does finally engage, the transmission clearly "clicks" and catches, much like a slipping transmission would do. Any advice is greatly appreciated. Thank you all very much for sharing your knowledge and experience. I hope I can somehow return the favor in the future. My best to all of you.

 

[Mitch85]

I'm having same problem with my 2005 6.6. Have replacement nsbu input and output speed sensors still having issues on rainy days.