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Chevrolet Avalanche Problems & Solutions



  • brucecr_msbrucecr_ms Posts: 47
    The 2500 comes standard with the 8.1. You also get a different front grill, "2500" on the front door cladding, and a few other things. As for gas mileage, I'd love to know (well, maybe not). My AV is one of those you can't fill the tank all the way (the present TSB does not fix those AV's built in Oct 2001 for some reason). I've estimated it at 10mpg to 13mpg commute driving. You don’t get this "big" of a truck for gas mileage. If you don't need to tow a lot (we do), go for the 1500.

  • cchastaincchastain Posts: 1
    My 02 Avalanche has developed a slight vibration in the steering when traveling up or down a curving grade. The sound is noticeable in the cab with the windows up and can be felt through the wheel. The dealer has checked the breaks, greased and serviced the bearings, new tires, a new SIR ring and a new front differential. All with no effect. Any other ideas?
  • Hello,
    I purchased a 2003 AV in November 02 and it has been in the shop four times due to the steering wheel vibrating & shuttering and low speeds, usually in a parking type situation where you turn hard. On two occasions they found nothing, they changed gears the second time and just a couple of weeks ago Chevy called and advised they had "a fix".They ended up changing more steering gears and draining the system but it still has the same annoying vibration.
    Does anyone have the same problems on hard turns at very slow speed????????? Chevy cant seem to figure it out.
    I would appreciate any info.
  • kellyz06kellyz06 Posts: 2
    I have an 02 ave 2500 8.1 L with 8000mi. I have taken it to the dealer for the same problem and have gotten nowhere. My dealer did less than both of you. I am just glad to know somewhat else has this problem. If I learn anything I will let you know. I can't even get my gas gauge fixed!
  • brucecr_msbrucecr_ms Posts: 47
    Is it not reading correctly? Or are you experiencing the 2500 "bug" where you can't always fill your gas tank all the way up? I'm STILL waiting for Chevy to come up with a fix that works on my truck (and other owners in the area, all trucks were built in October).
  • kellyz06kellyz06 Posts: 2
    My gas guage will move but at 200mi on the odometer, the gage shows over 3/4 full. The dealer replaced both sensors, but no change. As far as filling the tank, I have the same problem as you do. Their fix did not work. I would gladly tolerate this if my gage would work. I am a fairly diehard GM man, but I have just about reached my limit.
  • aldan93aldan93 Posts: 202
    Number 1, have or did you fill up in the past at a Mobil?

    Did you switch stations lately?

    I use to fill up at a Sunoco(15-16) MPG, they use 10% Ethanol with there regular 87, I switched to MOBIL my MPG went from 15-16 to 19MPG 50/50 highway/city, 100% Highway got 23 MPG!!


    I own 2003 Trailblazer LS 4X4 FYI

    I thought I should tell you guys!
  • fgurleyfgurley Posts: 12
    We purchased our AV a few days before 911 and have a little over $25,000 miles. We don't remove the panels very often but when we did the other day we had the weather stripping problem. 3rd panel is still at the dealership and they are trying to figure out how to fix it. From other comments here, sure don't want to have to wait for them to order new stripping. Almost afraid to leave panels off for a long time. We have had a lot of rain from tropical storm Bill and I'm afraid water will start coming into the cab from the bottom. Haven't had the other leak from the window yet. We also had the rust problems from the luggage rack. You would think they would have notified their dealers from the time we got ours to when some other folks took delivery to try and take care of that problem.
  • ygmnygmn Posts: 179
    They should give you new panels as there is a TSB,,,,for this a long time ago and well the replace them when this problem appears........

    Rust fro luggage rack is also a TSB about when dealer installs they leave drill shavings on roof and they no they hgave to claybar and clean up....
  • fgurleyfgurley Posts: 12
    After many days of leaving panel #3 at the dealership, we were advised today that new panels were not under warranty for the weather stripping. We were advised that we should have taken them off periodically and used something similar to Armor-all, etc. to keep them from getting stiff and sticking together.
  • fgurleyfgurley Posts: 12
    After many days of having panel #3 at the dealership, we were told that they could not fix the weather stripping and that new panels were not covered under warranty. Seems that they say you should remove the panels periodically and use something similar to Amor-all to keep them from getting stiff and sticking together.
  • bronlex2bronlex2 Posts: 1
    I'm sure this has been posted before, but my Dad just purchased an Avalanche. Unfortunately, he had hip surgery and can't drive it for six weeks. To make a long story short - birds used it for target practice while he was hospitalized, so I went to a car wash to wash off everything and the bird doo simply will not come off the plastic cladding. I scrubbed some more with just water - but does anyone have any suggestions? I'll try hand washing with a brush next time I'm back but just thought I'd see what the experts say!!. What a great truck. Wish I could afford one. Thanks in advance
  • Get back to your dealer and explain that they don't make warranty terms, GM does.

    This is not a gray area. It's defective. If the dealer refuses to repair the defect, get their refusal in writing and call GM's Customer Service. GM will get it taken care of. Do not waste your time with an uncooperative dealer.
  • brucecr_msbrucecr_ms Posts: 47
    Soak the area with soapy water for a few minutes, and then use a stiff nylon or horsehair brush. Don't push too hard otherwise the area will be a different color and texture once dry. Spray the whole cladding with your favorite plastic treatment. It should be almost good as new.

    Good Luck!
  • garison33garison33 Posts: 1
    at 12000 miles my 03 avalanche has developed a very bad chirping noise coming from somewhere in the front part of the cab....the dash near the radio, the console, or the driver seat area....can't detect exactly where. It happens anytime I'm driving on a bumpy road or on a gravel road etc.

    Any help out there? my dealer wasn't much help when I took it in. They removed a pair of my daughters sunglasses from the pouch behind my seat and said that would take care of it....of course it did not.
  • Karen_SKaren_S Posts: 5,095
    Are you running the AC when it happens? Could be the fan chirping?

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  • nvbankernvbanker Posts: 7,285
    Dontcha just love it when the dealer fixes a rattle by removing your "stuff" from pockets and compartments? Like we didn't think of that already? Makes me furious!
  • oletankeroletanker Posts: 3
    Hi All,
         Just found this site and find it a world of knowledge and comfort. Today is our second month anniversary with our new 03 Z66. Sure wish it was here to celebrate. While returning from a short vacation in VA the engine I was monitoring for oil consumption blew sky high in WV. I had been to the dealer and informed him of this problem along with several others (shuddering steering wheel at slow speed, clunking from the front end while turning, computer module hanging from under passenger seat, drivers display updating itself while driving, running light blowing out, fuel gage going crazy etc....)and they gave me a monitoring sheet to track oil usage. Laughing I asked the dealer if the engine started making a loud noise should I turn the radio volumn up. Well, at 5,629 miles (and 6.5qts of oil since the last oil change) she blew sky high (appoligies if anyone happened to be behind me) With 500 miles remaining to travel to Ft. Knox and a unfamiliar dealer I enjoyed sitting on my behind while we went through the loaner process. Another really nasty experience. Anyway has anyone else experienced these type problems with their 03 models ? Take Care,,
  • brucecr_msbrucecr_ms Posts: 47
    Here's how you get an Avalanche out of second gear on the freeway... :)

    Oletanker, sorry to hear about all your problems. I've had a few with my '02 2500 (leak, gauges, shudder), but nothing as bad as you. Problems seem to be too prevalent in most cars (our Dodge was a nightmare: we spent more time in the rental fleet than our own car). I hope everything gets worked out.
  • oletankeroletanker Posts: 3
    At the moment I'm waiting for the first response from "The General". I'm asking for a replacement, just can't trust the one that's still located in WV with my family. Anyone else ever receive a replacement AV ???
  • nvbankernvbanker Posts: 7,285
    My friends who have had Chevy truck problems like this got new engines, and no apologies, period. Good luck.
  • oletankeroletanker Posts: 3
    Thanks for the luck nv. If I understood the techy where they took my wounded Avalanche (Nicknamed, Hulio) there is no such thing as a "new" engine replacement. He said they would tear it down and replace the faulty internal parts. In the Army we use to call these "rebuilds" ! If I were to end up with a new bottom end, aka block the numbers won't match and it would be considered an after market according to a post earlier. I don't know if this guy knew what he was talking about,,,my wife and I are about at wits end ! Guess we'll find out tomorrow. Take Care,,,,
  • nvbankernvbanker Posts: 7,285
    Yes, and after they "rebuild it", when you go to trade it in, they will run a report on the car, see the engine failed, and tell you they have to wholesale it off because YOU blew the engine up. Hope you leased it, so they HAVE to take it back at the end of the lease.
  • perezlperezl Posts: 10
    My new Avalanche with the 8.1 engine only gets about 20 psi of oil pressure at idle and only 45 psi when normal driving. Is this normal or is it too low???
  • My 8.1 engine is running about 35 at idle and 60 at 2500 rpm. The oil is about halfway through it's life. Is it really hot there (100F or over)? Did too low of a viscosity oil get added? The Users Manual is of absolutely no help (if the oil pressure is in the low range, engine damage can occur. Duh!). I would run it by the dealer and get your low pressure documented. I don't THINK there are any TSB's concerning low pressure, but it can't hurt to check.

    Good Luck!
  • Before reading you posts, I was really considering an AV. I'm preparing to enter the lawn business and I will need some towing power. I also love the room. I'm not sure now. I've been looking at the 02's. Should I consider another vehicle?
  • nvbankernvbanker Posts: 7,285
    I really like the Avalanche, and particulary the way it drives. But it's not really a proven vehicle yet. There are some issues. And the worst of it is, GM isn't a lot of support or help.
  • dcrislerdcrisler Posts: 118
    I would not hesitate to buy another. I have only had 2 issues, neither of which have I had time to take it in for.
    1. the "easy exit" feature of the power drivers seat has gotten off and does not go all the way down and back...
    2. the round knob that unlocks the midgate(1 on each side) fail off the other day.

    The dealer offered a free loaner and said just bring it in whenever it was convenient.

    avg mpg per the computer is hovering around 16mpg... so not much to complain about.
  • txyank1txyank1 Posts: 1,010
    not proven? It's a Suburban. The only thing that remains to be seen is how the midgate and water drainage system hold up. GM seems to have a pretty good handle on it as far as it's function. I figure if it's a problem long term I'll just seal it all up and have a dam nice riding CC Short bed pickup. Which is all I really wanted in the first place. :)
  • nvbankernvbanker Posts: 7,285
    Well, ok, I apologize, I do like the Avalanche a lot, so I'm not knocking it. It clearly is built on a shared platform, but seems to have more issues due to the revolutionary design, I guess...
This discussion has been closed.