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Chevy Silverado and GMC Sierra Transmission Problems

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Comments

  • chuck1919chuck1919 Posts: 176
    edited July 2011
    Even if it is 100 - do the math on the failure rate based on nearly 50,000 units (Silverado/Sierra) sold in June. And don't forget many are "clunk" comments which have nothing to do with the transmission shift or drivability, it's strickly a occasional power train noise.
  • obyoneobyone Posts: 8,065
    edited July 2011
    I have taken vehicles to the dealership for warranty work in the past and it is pulling teeth to get something fixed.

    I've found that the make of the vehicle usually doesn't matter much. With warranty issues I've pulled teeth with virtually every make. What I did discover though is if you choose to try another GM dealer it might make a world of difference.

    Before dumping the truck I would at least

    -Try another dealer
    -Check out the TSBs available for your truck; you wouldn't be the first to walk into a service department with a TSB that they had overlooked
    -You could email the GM customer service rep that monitors the GM boards and see if they can assist you with your dealer

    Getting rid of the truck I would think would be the last resort due to the substantial depreciation hit. Let me see if I can find the list of service bulletins.
  • obyoneobyone Posts: 8,065
    AT 2-3 upshift or 3-2 downshift clunk noise


    INFORMATION

    Bulletin No.: 01-07-30-042F

    Date: February 05, 2010

    Subject: Information on 2-3 Upshift or 3-2 Downshift Clunk Noise
    Models:
    2010 and Prior GM Passenger Cars and Light Duty Trucks
    2010 and Prior HUMMER H2, H3
    2005-2009 Saab 9-7X
    with 4L60-E, 4L65-E or 4L70-E Automatic Transmission (RPOs M30, M32, M70)

    Supercede:
    This bulletin is being revised to add the 2010 model year and 4L70E transmission. Please discard Corporate Bulletin Number 01-07-30-042E (Section 07 - Transmission/Transaxle).

    Important
    For 2005 model year fullsize utilities and pickups, refer to Corporate Bulletin 05-07-30-012.

    Some vehicles may exhibit a clunk noise that can be heard on a 2-3 upshift or a 3-2 downshift.

    During a 2-3 upshift, the 2-4 band is released and the 3-4 clutch is applied. The timing of this shift can cause a momentary torque reversal of the output shaft that results in a clunk noise. This same torque reversal can also occur on a 3-2 downshift when the 3-4 clutch is released and the 2-4 band applied. This condition may be worse on a 4-wheel drive vehicle due to the additional tolerances in the transfer case.

    This is a normal condition. No repairs should be attempted.
  • obyoneobyone Posts: 8,065
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  • chuck1chuck1 Posts: 1,405
    See the following -

    AT 2-3 upshift or 3-2 downshift clunk noise


    INFORMATION

    Bulletin No.: 01-07-30-042F

    Date: February 05, 2010

    Subject: Information on 2-3 Upshift or 3-2 Downshift Clunk Noise
    Models:
    2010 and Prior GM Passenger Cars and Light Duty Trucks
    2010 and Prior HUMMER H2, H3
    2005-2009 Saab 9-7X
    with 4L60-E, 4L65-E or 4L70-E Automatic Transmission (RPOs M30, M32, M70)

    Supercede:
    This bulletin is being revised to add the 2010 model year and 4L70E transmission. Please discard Corporate Bulletin Number 01-07-30-042E (Section 07 - Transmission/Transaxle).

    Important
    For 2005 model year fullsize utilities and pickups, refer to Corporate Bulletin 05-07-30-012.

    Some vehicles may exhibit a clunk noise that can be heard on a 2-3 upshift or a 3-2 downshift.

    During a 2-3 upshift, the 2-4 band is released and the 3-4 clutch is applied. The timing of this shift can cause a momentary torque reversal of the output shaft that results in a clunk noise. This same torque reversal can also occur on a 3-2 downshift when the 3-4 clutch is released and the 2-4 band applied. This condition may be worse on a 4-wheel drive vehicle due to the additional tolerances in the transfer case.

    This is a normal condition. No repairs should be attempted.
  • That's, great information Chuck. But my problem has nothing to do with a clunk.I have owned nothing but GM products, and they have always had the GM clunk. I do have a very nice 2011 Silverado for sale if your interested.
  • chuck1chuck1 Posts: 1,405
    Sorry for your issues. However, the previous post is because many on here are searching for an answer to the "clunk" and there isn't one. They need to move on or dump their truck for a Toyota, Dodge, or Ford.
  • so chuck that is a great tip so why didnt it do it when i bought it. there was no problem then but now what a mess. So easy for you to say dump it and get a ford toyota etc. my truck is paid for $38900 i didnt pay all that to hear a clunk, locking torq not release and the best one of all just got it back today and guess what truck is in normal specs the noise i hear is called LASH FROM THE TRANS TO THE DRIVESHAFT wtf is that is that an extra i have to pay for, cause it didnt come on the build sheet
  • Let me rephrase what I consider a normal Chevy clunk. That would be a small clunk when you shift from park to drive, anything else I would consider defective.
  • Exactly, my truck drove home like a dream, and after that, a piece of crap. I am still waiting for my transmission to learn me. Maybe it's because I don't drive like i'm heading to a fire.
  • chuck1919chuck1919 Posts: 176
    edited July 2011
    The clunk which is not constant nor regular and does not hurt anything but your ears. It doesn't hurt the transmission or anything else. It's easier to dump your truck that letting this OCCASIONAL noise bother you.

    ITS NOT A BIG DEAL (the clunk).

    If it's going to eat at you, as soon as you make enough payments on your truck to have equity, dump it if it bothers you that much.

    Or you can keep it and be unhappy and keep posting on Edmunds.
  • gmcustsvcgmcustsvc Posts: 4,100
    lidarules1,
    I apologize for your frustrations. If you are unhappy with the diagnosis from that dealer I would definitely recommend getting a second opinion. I would recommend riding with the technician so you can point out what it is that you are experiencing. Can you please email me with your VIN? I look forward to your response.
    Christina
    GM Customer Service
  • Chuck,
    I decided after all that I couldn't pass up the truck deal. I bought a Silverado 1500 LT Texas Edition crew cab with leather interior yesterday for $10624 off of sticker including 3391 GM card rebate plus 4505 GM bonus cash for this area. It still wasn't cheap- most expensive vehicle I've ever purchased by 10K. Hopefully GM will honor the powertrain warranty if I got one of the problematic units. I didn't feel or hear anything to worry about on my 5 mile test drive, although the acceleration and braking were nowhere near as responsive as my Buick sedans. I decided I could get used to it. I also bought peace of mind by extending the bumper to bumper coverage up to 100,000 miles (unlimited time duration). Wish me luck, guys!
  • chuck1chuck1 Posts: 1,405
    Congratulations. I have just turned over 4,000 miles on my 2011-5.3 Crew cab LT w/towing pkg. this morning. It runs great. We bought it to tow a 5,000 pound trailer with. We are going to travel across the country. I have not yet purchase an extended warranty yet, but plan to do so. The Major Guard warranty pretty much covers everything on the vehicle with very few exceptions.

    Your right, vehicles go up in price every year. This truck discounted the way they are makes them so much cheaper than the competition. You can't touch a Ford, Dodge or Toyota for the same price paid and equipment.
  • kmarrkmarr Posts: 1
    I have a 1998 chevy pickup, vortech v6 auto trans . I was driving down the road had to pull over to talk on the phone, after i was done i put it in gear, and i have no forward gears. the fluid level is good and dosent smell or look burnt, can this be an electrical problem or shoud i buy a transmission
  • Hey, was wondering if anyone can help me out I have an 04' GMC Sierra 5.3L 4x4 w/o hybrid with a transmission that shifts late at 3,500 RPM (seems like it dosent want to shift) when shifting into 2nd, and I found a 99' Chevy Silverado 4.8L 4x4 4L60E transmission with under 20,000 miles on it for $350. Will these transmissions match up or is there a more simple fix, shifter celenoid? that would be a better option? any help would be great
    thanks-
    Dan
  • Can someone tell me why my tranny sounds like it's slipping at 40-50 mph the motor revs up but I don't lose any speed. . It was rebuilt about 40 g ago. Torq converter?
  • the problem with mine was the 2 sensors in the trans. if that is the problem and you dont fix it soon you will have to have it rebuilt
  • Please elaborate...? The problem with your what? It was doing what? and was fixed by replacing two sensors? do you know what they were?

    thank you,
    Clint
  • ceb66ceb66 Posts: 70
    edited August 2011
    My truck doesn't clunk.

    IT SLAMS!

    Literally, there's a metallic bang, then "slam".

    The "District Specialist" spews the GM mantra; "It's operating as intended." I asked the DS if the engineers "intended" for the transmission to slam. Answer: "you need to take it back to the dealer!" During one conversation she actually asked what octane fuel I'm using!

    According to a consumer affairs attorney, GM has used that phrase, "operating as intended", for years when they have transmission issues and don't want to address them.

    My 2011 also pulls right since new (alignment attempted w/ no improvement), growls when in AFM, and on a rare occasion the transmission slips. The torque converter was replaced less than a week after delivery to address the slip. That didn't help.

    Now the A/C cuts out sporadically. It's four months old! What in the world?

    That's right, it has to adjust to my driving habits!

    "Just drive it" doesn't cut it when you spend money on something like this.

    If you have a newer GM truck and have any of these issues, keep contacting GM.
  • chuck1919chuck1919 Posts: 176
    edited August 2011
    Since there is not a "Happy owners Forum" I thought I would post here. Just got back from nearly a 2,000 mile trip with my '11 Silverado, 5.3 HD towing pkg. and chrome pkg. On the way back yesterday the average mpg. was exactly 20mpg between Salt Lake and Mesquite,NV. The temps were in the low 90s. The transmission temp stayed about 175.

    After filling up in Mesquite where the temperature was 111 we headed out across the desert back to Southern Calif. The outside temperature at Baker, CA was 116 degrees. It stay nice and cool inside the Crewcab with the automatic temperature control set to 74degrees. The AFM would work as designed coming down the hills and switch to 4cyl. mode. The temperature of the transmission climbed to the high 180s through the desert heat.
    Arrive back in Southern California the average mpg was 18.5 (drove a little faster through the desert).

    The truck rode and operated great. My only critique is the transmission to me is too quick to downshift at highway speeds. I suspect this is programmed in to the software for some reason.

    The truck has 6,000 miles on it in three months. Is the automatic transmission the most refined? No - It does occasionally "clunk". My '05 4Ruuner which I traded in was "over engineered". It ran great for 95,000 miles.
  • ceb66ceb66 Posts: 70
    edited August 2011
    I forgot; while friends were riding with me, more than one person has said "what was that" when the truck slips, engages, then slams. I can't help but thell them "it's adjusting to my driving habits!"

    If you can't laugh at throwin' over 30 thousand dollars down the drain, what can you laugh at?
  • lstriplstrip Posts: 42
    My 2010 sierra 1500 now has 16000 miles on it and it still has the same transmission issues.
    i have read the gm responses from chuck1 and chuck1919. it is really disgusting when you hear "if you don't like it, dump it" and "it is operating as designed".
    just because gm says nothing is wrong doesn't mean NOTHING IS WRONG.
    my truck continues with the same problem of searching for a gear between 30-50 mph.
    and yes it will sometimes CLUNK. if this occured all the time i would agree that it was designed this way. but, because of its interrmittent nature it could not possibly be designed to operate this way! it is unfortunate that our gm posters(chuck1 and chuck1919) are trying to suppress the conversation on this issue. the only way we are going to get this fixed is to continue discussing this and continue to push gm to find an answer.
  • chuck1919chuck1919 Posts: 176
    edited August 2011
    "if this occured all the time i would agree that it was designed this way. but, because of its interrmittent nature it could not possibly be designed to operate this way! it is unfortunate that our gm posters(chuck1 and chuck1919) are trying to suppress the conversation on this issue."

    No one is trying to suppress ANYTHING. Does the transmission clunk occasionally? Yes - this is exactly why it will not be fixed (probably) by GM. Do you like your truck otherwise? If you do then you need to overlook this fault. Because the 12 or 13 people on here is not enough to have GM repair this fault (if you want to call it that). Does your truck get you to your destinations in a reliable manner? MIne got through the desert in what can be described as very harsh conditions. (See my post above). And you can notice that I did say it does OCCASIONALLY clunks.

    If it eats you up and keeps you awake at night...dump it. If it works otherwise and gets you to from point "A" to point "B" then it's not as big as a problem as the 12 or 13 posters on this board make it out to be.

    GM has a bigger problem, trying to figure out how to move a 120 day inventory of GMC/Silverado trucks.
  • ceb66ceb66 Posts: 70
    lstrip,

    You said it searches for a gear between 30-50 mph. Try this if you haven't already; drive it with the "Instant Economy" LED on. If it searches for a gear while it's bouncing back and forth between 4 and 8 cylinders, that "search" you feel is the "Active Fuel Management." Mine does that. It growls in 4 cylinders then lunges a bit when engaging all 8 cylinders.

    Mine really can't decide what to do in the mid 40 mph range. Especially around 47 mph.

    The AFM is so annoying, on long trips, I actually drive in manual 5th gear to keep from continuously bouncing back and forth from 4 to 8 cylinders.

    Lets keep trying to get GM to fix this fault (and the other problems with this drive train).
  • adeemadeem Posts: 7
    I recently bought a new Sierra pickup 4x4 1500 GMC 2011 and noticed that it's trans. Is behaving exactly like you explain. I took the car to the dealer in my country Saudi Arabia and they checked it and came back with the same reply "the trans. Is behaving as designed" . It looks like that GM is telling all it's dealers all over the world what to say to escape their design problems.

    In fact the situation is getting worse as it becomes safety hazard... The trans. Sometimes shifts suddenly especially when slowing down at intersection that makes the car jumps forward out of control and that will result in hitting any thing close in front of the car. I am not sure what to do... I am thinking seriously to sell it.

    The question now
  • chuck1chuck1 Posts: 1,405
    "The trans. Sometimes shifts suddenly especially when slowing down at intersection that makes the car jumps forward out of control"

    So the transmission is "downshifting" and this causes it to lurch forward? I thought as a transmission downshifts it slows the vehicle down.

    Please explain? Also, how is it out of control?
  • lstriplstrip Posts: 42
    ceb66,
    i thought that this was possibly the issue also.
    i even asked my gm service manager if the AFM could be disabled and then
    let me drive for about a week to see if that was the problem.
    he said it could not be done.
    i have driven thousands of miles monitoring the 4cyl to 8cyl and vice-versa to see if this was the issue. it does not correspond to the surge/searching transmission problems that I continue to experience. Aggravating as hell!
    But then I remember, IT WAS DESIGNED TO INTERMITTENTLY SURGE AND SEARCH FOR A GEAR. RIGHT CHUCK!

    Larry
  • herm33herm33 Posts: 2
    I'm having the same "clunk" issues with my 2010 Sierra. It baffles me how such a good looking truck can have such crappy workmanship...especially the transmission... definitely not professional grade.

    Who is everyone complaining to? I want to express my dissatisfaction with GMC.
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