2-3 upshift clunk

topo4u2 · September 12, 2005

Hello,

I have been reading the forums on what I could find with regards to this clunk some are getting. I have been noticing it myself in my 05 Z71. It seems to only do it at certain speeds and not all the time. I guess my question is...does anyone know if it will hurt anything? Is it worth mentioning to the dealer or will I get a runaround? Truck is still under warranty but from what I read it does not sound like this issue is getting cured for most.

mcreyaufmiller · September 12, 2005

probably good to mention it to the dealer, even though they will not find anything (as they say) it will document to GM that you complained about the problem.

budone · September 12, 2005

Hello,
I have been reading the forums on what I could find with regards to this clunk some are getting. I have been noticing it myself in my 05 Z71. It seems to only do it at certain speeds and not all the time. I guess my question is...does anyone know if it will hurt anything? Is it worth mentioning to the dealer or will I get a runaround? Truck is still under warranty but from what I read it does not sound like this issue is getting cured for most.

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I would definately take it in. You will hear what the rest of us have, but you will have a record of the visit if something worse happened later.

topo4u2 · September 12, 2005

Thanks for the info...I will do that next days off. Always appreciated.

I wonder what will be next...mmmm

topo4u2 · September 13, 2005

Update:

Dropped her off at the dealer today. Got a call a few hours later to tell me they cant hear it. I went down and took the guy out with me and sure enough I cant make it do it either....mind you its like 100 degrees in the shade today so the heat may have something to do with it. Anyway, shall leave it for now untill it gets colder out and see if it becomes more persistent. But at least its on record. When I picked it up the service manager said no charge today....duh!!! its under warranty.

sledr · September 14, 2005

My '04 Silverado ECSB Z71 has done this from day one. I currently have 55000 kms and it hasn't gotten worse but it hasn't gotten better either. The dealer told me this is normal operation. The bulletin I read also confirms this for me. I just nail the gas a little harder when I take off in order to get rid of the clunk.

topo4u2 · September 14, 2005

thanks for the reply Sledr. Nice to know Im not the only one with the same condition. And yes, it certainly is speed related.

sledr · September 15, 2005

BTW There is a bulletin out there dated May 9th 2005 that addresses a rarely occuring hesitation or slipping on takeoff. My truck has this condition also. It has happened 3 times since i have owned it. The fix involves a reprogram of the PCM. There is also mention in this bulletin addressing the 2-3 shift clunk as well as the hesiation. I had the reprogramming done a few weeks ago and the clunk hasn't disappeared but I don't seem to notice it as much. It may be worth while to talk to the dealer about it.

topo4u2 · September 15, 2005

Thanks again Sledr,

I will have to hunt up that bulletin and print it out or something. My dealer would have to see it in black and white. I only had that tranny delay happen once so far. Thanks again for the info.

cbsmith · September 18, 2005

I had the STB from May 9 applied ot my truck on Friday and the shift clunk noise is not as loud now.

topo4u2 · September 18, 2005

I had the STB from May 9 applied ot my truck on Friday and the shift clunk noise is not as loud now.

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Hey cbsmith, thanks for the info. Do you know what they did exactly? I cant seem to find the STB anywhere so I can print it out and take to dealer. What year is your vehicle.

Thanks

budone · September 19, 2005

I had the STB from May 9 applied ot my truck on Friday and the shift clunk noise is not as loud now.

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Hey cbsmith, thanks for the info. Do you know what they did exactly? I cant seem to find the STB anywhere so I can print it out and take to dealer. What year is your vehicle.

Thanks

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TSB 05-07-30-012

pastor scott.com · September 19, 2005

Hey Guys , brought me 04 burb in today to the dealer for the 2-3 shift and quick slip, I showed him the TSB and looked like he never heard of such a thing, but said he would check it out. Who wants to bet that when I pick it up they say, (thats normal and dont worry about it ?

Scott

Mark_in_Tulsa · September 19, 2005

I had the STB from May 9 applied ot my truck on Friday and the shift clunk noise is not as loud now.

<{POST_SNAPBACK}>

Hey cbsmith, thanks for the info. Do you know what they did exactly? I cant seem to find the STB anywhere so I can print it out and take to dealer. What year is your vehicle.

Thanks

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TSB 05-07-30-012

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What exactly did that TSB do?