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Chevy Silverado and GMC Sierra Transmission Problems

506 messages,  Last post on Dec 01, 2009 at 1:57 PM

You are in the Chevrolet Silverado & GMC Sierra Forum. Your Host is kcram

What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Transmission, Truck


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#434 of 506
1995 CHEVROLET SILVERADO TRANNY!!!!! by wwc_da
Apr 14, 2009 (7:11 pm)
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PLEASE HELP ME OUT ANY WAY YOU GUYS CAN!! I JUST BOUGHT A 1995 CHEVROLET SILVERADO Z71 TRANNY WAS NOT SHIFTING OUT OF 2ND TO ANY OTHER GEAR!!!!! SO I HAD IT REBUILT PUT IT BACK IN AND IT SHIFT'S HARD FROM 1ST TO 2ND... JUST LIKE IT WAS DOING BEFORE I HAD IT REBUILT... AS WELL AS IT STILL WON'T SHIFT OUT OF 2ND TO ANY HIGHER GEAR!!!????????
#436 of 506
2003 5.3l Z71 clunks and such by garlinghouse
Apr 15, 2009 (12:47 pm)
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Hi, this is my first post. i am a former Dodge service advisor so I have some mechanical experience in trucks. I currently purchased an 03 chevy Z71 ext cab with 5.3l. I have the steering shaft clunk issue. a buddy of mine got a new steering shaft put in which is just like the original. he is starting to have issues again. my suggestion is purchasing a updated heavy duty one through LMC truck catalog. it runs about $379.00 and claims to solve this issue. second, I also have the 2nd to 3rd gear shift clunk underneath my truck at low speeds or going up hills. Another buddy of mine has an 04 sierra ext cab Z71 with 5.3l and had the same issue at 22k miles. He got this issue fixed at the gmc dealer where he lives, they replaced his driveshaft with a beefier one which looks like a 2500hd shaft not sure though but definately beefier than the stock one. he now has 40k miles and says he has had no further problems. Hope this is helpful, I plan to do the same with mine and also put the steering shaft from LMC when i have the money to do so (Damn Economy!). Overall i am pleased with my truck and absolutely love the ride, though not as exciting when flooring it like a Hemi but still satisfies my needs!
#437 of 506
Re: Clunk (down shift) 10-15 seconds after being at a complete stop [firejj09] by detbreakdown
Apr 16, 2009 (6:37 am)
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Replying to: firejj09 (Apr 05, 2009 12:55 pm)

I would suggest you have someone check the speed sensor it tends to get stretched out then it shorts out.
#438 of 506
Re: Clunk (down shift) 10-15 seconds after being at a complete stop [firejj by eug3
Apr 17, 2009 (1:21 pm)
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Replying to: firejj09 (Apr 05, 2009 12:55 pm)

I have 2007 Sierra that does the same thing. they lube the shaft today I dont believe this will work. I will let you know
#439 of 506
p0700 transmission code on allison by kevinc70
Apr 14, 2009 (11:41 am)
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#440 of 506
p0700 transmission code on allison by kevinc70
Apr 14, 2009 (11:41 am)
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I have a check engine light on in my 2003 GMC sierra 2500 h.d with the allison and when I scan it a p0700 transmission code comes up and wont erase. The truck also has no reverse lights and the steering column indicator does not work, along with DIC (driver info center) could this be linked or just a coincidence. It seems to shift and operate fine. Just wondering if anybody had a issue like this or simular.
#441 of 506
97 chevy trany problem by guitaro
Apr 28, 2009 (4:12 pm)
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My '97 chevy does not want to shift from 1st to 2nd at first, but after it does I can drive a hundred miles and its fine. This problem is getting more frequent and lasting longer everytime. If anyone knows anything I could sure use some help. Other than when I very first take off there is no hint off a problem.
#442 of 506
Bucking at 45 MPH by 05radoinbg
May 08, 2009 (11:10 pm)
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Hey everyone. Bought a 05 Silverado 1500 5.3L last week. It has 87k on it. I am a fleet manager and I only run Chevrolets and have been proven to the durability of these trucks but I may be proven wrong with this truck. I started noticing the other day that while driving at around 45 mph, without the cruise control, the truck has a lot of bucking and jumping and vibration. Had the tires rotated and balanced today and it still seems to be getting progressively worse. I have also noticed that when driving from 40-60 without cruise, the RPM's have a lot of fluctuation... and by the way, this is annoying as crap now that I have Flow Masters! I have also started noticing that every once in a while, the transmission slips when shifting from first to second. I have never seen this kind of problem out of my trucks at work so I am stumped on where to start. Anyone have any ideas?
Thanks!
#443 of 506
Re: Clunk (down shift) 10-15 seconds after being at a complete stop [detbreakdown] by Thunderman50
May 11, 2009 (8:06 pm)
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Replying to: detbreakdown (Apr 16, 2009 6:37 am)

I have a 2008 Sierra 1500 that does the same thing. I can be sitting at a stop and all of a sudden it will clunk almost as though I've been slightly bumped from behind by another vehicle. Also has slight clunk on 2nd to 1st down-shift at 12 mph. I've had it to dealer 4 or 5 times. Changed out yoke, did nothing. At present time I'm battling GM at the national level and locally. I won't give up.

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