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Chevrolet Avalanche Transmission Problems



  • mav007mav007 Posts: 4
    i purchased a 2004 in feb 2008 with 80,250 miles the trans went out with 132000k mi
    you never know run a car fax and ask the dealership to run the v i n for any service work....a service history i wish u well mavrick
  • west8west8 Posts: 4
    I was reading about you guys solenoid problems and want to know if my problem is the same thing. My 04 Avalanche does not want to stay in 2x4 it will bump into neutral so I have had to keep it in auto 4wheel, any suggestions what may be causing this.
  • Hunterman4- I had the same exact problem happen to me this afternoon with my Avvy. I jumped online and starting looking to see if there were any posts regarding tranny problems and I stumbled upon yours and mav007's posts, so I called the GM customer service hotline and explained to them the problem and they are going to review my "case" with the tech tomorrow. I was just wondering if you still had the phone number that they asked you to call.
  • Sorry, but I don't have it any more. I believe that it was to GM corporate offices. I was very impressed when I called the number that they gave me and an actual human answered the phone. As I stated in my post, I thought that GM was very fair in the way that they treated me. I explained to them that regardless of warranty coverage, a transmission should not fail with only 46000 miles on the vehicle. They agreed with me. Good luck to you.
  • 51yrsgm51yrsgm Posts: 2
    If you sold 03 AV cowboycadillac...I think I now own it! Kick seems to be getting worse (does it most every time now) Anyone else haveing this problem? Is 12 MPG rolling down hill on interstate really what I can expect out of this truck?...If so...It's GONE! WHAT A PIECE OF JUNK!!!!!
  • My 2004 Chevy avalanche z66 was working great today. after driving all day I went to go to the store and the transmiton went to drive on the column but did not engage to move.I checked the fluid that was full and I shut the truck off for 30 minutes then got in and tried again the truck went into gear and drop 100 yards and then stopped driving. I did this again waited 30 minutes started the truck, it went right into gear then drove 1/4 mile and then stopped driving again...could this be an electronic sensor problem ? or do you have any idea what this might be?

  • smfd730smfd730 Posts: 1
    otownglazier.. My 04 avalanche is doing the exact thing that you said was happening to yours.... perhaps u could give me an idea on what it is?? thanks
  • cesarhcesarh Posts: 1
    Did you find out what the problem was...tjis just happen to me and i hate to overpay if it is something electronic or so?
  • kato677kato677 Posts: 2
    To anyone who settled w/ GM for Avalanche Transmission Problems,

    PLEASE let me know what settlement you received & if you had to sign any paperwork which said you could not file any complaints against GM w/ your Attorney General's Office and/or pursue GM for any remaining or future repair costs. In addition, what did GM conclude about your claim and what was your initial problem & onset of said problem.

    Thank you!
  • kato677kato677 Posts: 2
    It seems you have had some success w/ GM. I noticed you haven't been on the forum in a while, so my hope is you have this set to e-mail you if someone responds. I just posted a message on the board regarding specifics on problems, settlements and communications w/ GM. If you could provide me with additional information on your settlement, I would be very greatful.
  • mav007mav007 Posts: 4
    my avalanche is a 2004 w/132,000mi i don't think i qualify for a gm settlement do i ?
  • GM agreed to reimburse me for 1/2 of the cost to repair the transmission. The work was done by a private transmission place. I was not required to sign or agree to anything that prohibited me from making any claim against GM, etc. I have no intention of seeking any further compensation from the manufacturer.
  • My transmission just had to be replaced at 195,000. I did not know that there was a problem with GM and their transmissions. Is there a settlement? And if so how can I find out about this? The cost was 3000.00 to replace my transmission.
  • 69z2869z28 Posts: 9
    At least mine is a warranty-covered repair. The six-speed automatic in my 2010 Avalanche failed 2 wks ago (10/1) about 1.75 hours from home into a planned 7-hour trip. Just prior to the failure, the transmission felt like it was shuddering during easy acceleration, trying to decide whether to shift or not. Under hard acceleration, no noticeable problems. Ultimately it started decoupling & re-coupling the drivetrain. Traction control, Parking Assist, and other transmission-related features went bezerk with alarms, buzzers, and chattering relays. Spent rest of my day with Mr. Goodwrench before they finally gave me a rental / loaner. LOTS of failure codes in the transmission control module. Diagnosis is new torque converter.

    Been 2 weeks since the failure...still waiting on parts. This transmission FAILED AT ONLY 12,665 miles.

    I bought this Avalanche NEW on MARCH 6, 2010. Days later, the O2 sensor failed. One week after I got it, the engine started blowing blue smoke at start up. Turns out the GM engine plant put in the wrong lifters causing oil overflow into the intake. Dealer had to order new lifters and replace.

    To date, these problems add up to about 4 weeks without the truck, and we'll be well into next week before transmission parts arrive. (I've also had to have a new windshield, but that was a road hazard problem, not GM).

    This thing's MSRP sticker was more than my first house. If I ever get it back, it may go up for sale. I've owned GM vehicles since '69. This one might be the last.
  • I have a 2010 Avalanche with 6 speed auto trans. I have been having problems with the truck since hitting the 6,000 mile mark. Now have 10,300. The trans gets "hung up" when it really needs to down shift. I have almost been in two major car wrecks when crossing traffic where acceleration from a rolling stop was critical, and the dealer says there is nothing appears to be wrong. My neighbor has the same truck and has noticed the same thing, just not as often.
    The dealer has replaced control modules and trans settings, the gas mileage has increased from 13.5 to 14.5 mpg on average. I almost never get above 16.
    On a second item, has anyone noticed alot of wind noise around there windsheild above 70 mph and even "buffeting" of the weatherstripping.
  • 69z2869z28 Posts: 9

    I got my Avalanche back from the shop exactly 3 weeks after the failure of the torque converter. Seems to be okay now, but with these 6-speed units, I do notice what seems to be frequent 5-6 upshift and 6-5 downshift at cruising speeds. I'm guessing this is a result of the software trying to maintain optimum economy versus need to go slightly uphill, etc. (I live on a coastal plain, mostly FLAT land).

    Do you notice this effect too? Wondering if this adversely affects longevity of the transmission...seems like it could, but that's only speculation. Have thought about just setting it for Manual with 5 as the top gear and let the mileage suffer a bit.

    My mileage in fully automatic mode is 19-20. Again, mostly flat terrain, almost all highway driving.
  • gmcustsvcgmcustsvc Posts: 4,001
    So is this an intermittent problem? How many times have your taken your vehicle in to the dealer? Can you please e-mail me with your username, complete contact information including a phone number to reach you, your situation, VIN, and involved dealer? I look forward to your response.
    GM Customer Service
  • Hi, i had this problem 3 yrs ago on my 2004 avalanche. now its 2010 and the problem arose again. i asked many mechenics and they said if u never used it then u shouldnt have any problems. and i never used it. what did u do. im tired of keep paying out money for a truck that im supposed to enjoy
  • Hey did you ever find out what the problem was my 05 is doing the same thing if so please let me know I'm about to try and get mine fixed, thanks.
  • I never did find out the exact problem. The transmission place that repaired my truck said that they needed to replace the transmission and that is what they did. Total cost of job was 1800.00, GM agreed to reimburse me 1/2 of that cost. I was satisfied with that and have had o problems since that time. That was in the summer of 2009, 25000 miles ago.
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