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Chevy Silverado and GMC Sierra Undercarriage Rust



  • Sorry to chime in but I was searching for Silverado frame rust and I found this forum. I have a 2008 Chevy Silverado 2wd that I purchased used at 14k miles. I noticed a week after I bought it that the truck had rust on the frame members and undercarraige that was definitely not normal. Its on all of the edges of the frame members and bolts. The coating on the frame members is peeling away. How should I proceed
  • eames1eames1 Posts: 2
    It is interesting that this many people are experiencing this corrosion problem.
    I have a 2004 GMC Sierra 2500 HD. I Have had brake and the serious rusting problems on the frame and suspension. I first noticed it about 2 years ago. I thought the rusting was a bit excessive as the truck now only has 58000 miles. I sprayed paint on it then and have been watching it. . I was airing up a low front tire yesteday and I noticed serious corrosion and heavy crumbly bubbly rust on the frame and suspension arms. I have only seen rust like this on old steel that has been left to rot in a field. I also own a 1978 GMC Sierra 1500 Four Wheel Drive which I purchased new when I graduated school. This truck has been in water up to the carb several times packed with mud and everything else. I went in the garage just to look at its frame and was shocked at how nice it looked compared to my 04. Whats up with that? I have taken care of both vehicles very well but this 04 is experiencing accelerated corrosion. It almost makes me think the it is a metal composition problem or something with make up or treatment of the frame material. Any thoughts any one? I do see a lawsuit in progress Thanks eames
  • armyw4armyw4 Posts: 1
    I'll be interested to know how this goes. I just returned from deployment and me and my wife both bought new 2010 Silverado 1500 4x4s. I have 2K miles on mine now and the wife has 5K on her's. We live in central NC where we really don't see much rust. I installed step bars on our trucks last weekend and noticed hers is perfect on the under carriage. Mine is not. There is rust forming all over in different spots. My truck is two months old and there is no way it should look like this. I'm taking it to the dealer this week and see what they will do. I went through all my paperwork and realized that hers has been in NC the whole time while mine came from a dealership in Kentucky.....
  • i have 2003 chevy silverado ext cab an the rocker panels are roted away an the rear bumper an brake lines. the rockers i have notified the dealer an the body shop at the gm dealer told me the rockers rot bcos of a manufactor defect they are aware of this problem but refuse to recall the problem. this is a safety issue an i have notified the nhtsa an they said the only way for them to investagate this issue is for ppl having this problem is to file a complaint with them an the more complaints they get the more they can do about it an get the dealer to recall an fix the issue. so if ur having rust problems with ur rockers bumper an other componts we need to notify the nhtsa with a complaint. please pass this on, an get these safety issues taking care of. thanks
  • Hey EVERYONE- like all of you i also have an 06 silverado with yes, under carriage rust, it does seem excessive compared to my other vehicle which is a 2002 grand prix. The underside of my car is still like new after 8 year's were as my silverado i\m not impressed with it just a few day's after owning it.

    Now i have been reading the post about this and if i'm wrong correct me but if you undercoat it voids the warrenty, WHAT WARRENTY??????? If it's only for as year what does that tell you, GM wants off the hook as quick as possible.

    DO NOT USE UNDERCOATING FROM A CAN That stuff hold moisture like you cannot imagine. Even though from the surface it hides the truth which lies beneth it, and when moisture gets trapped you think you have problems now.

    I have been doing some research on rust prevention and the best one that i can somehow believe in right now is by the company KROWN. I'm having my truck done this friday for 140 bucks,

    This stuff repels water and can stop and in some cases slowly reverse the rusting process. My rear bumper is also rusting not to the extreme but it has started.
    I can't sit back and watch my investement rust away so i need to try something.

    You can't sit by and wait for GM to fix the problem, your warrenty is void anyway if nothings gets done. Take matters into your own hands and research Krown on the net, i have talked to several customers of this product and they all swear its an amazing rust prvention system.
  • gnl5gnl5 Posts: 3
    I purchased a brand NEW 2010 Silverado last week and have noticed an unusual amount of rust all over the under carriage. I will be bringing the vehicle in to the dealer next week to see what they suggest why a brand new vehicle with less than 150 miles on it can be full of rust. I also see the truck was assembled in MEXICO.
  • Where do you live?

    My 2005 is in FL beachside and rusted out within two years, but the signs were there within a few months.

    GM would not do anything for me. They claimed that they are not responsible for any corrosion due to the environment (which is ALL corrosion). But your vehicle is much newer.

    You need to demand a NEW vehicle. The problem you have will only get worse, and there is nothing you can do to stop it. There is something fundamentally wrong.
  • gnl5gnl5 Posts: 3
    Thanks for the information. I went to the dealer on Sunday and looked at apprx. 15 different 2010 & 2010 Silverado's and every truck had undercarriage rust on them. I'm located in southern Louisiana.
  • gm167gm167 Posts: 2
    edited December 2010
    I live in RI and own a 2000 Silverado 1500. After reading these posts on rust, I have to chime in. My truck has had EVERY brake line repleaced due to complete brake sys. failure, which caused me to have an accident in 2008. I aslo have NO rocker panels left. At the time of the accident the state took my plates and would not allow my truck on the road until all lines where replaced and the trk. was recertified for the highway. My ins. company was no help with the lines , but did repair the body damage and replace the other vech.I contacted GM (haha). Not their problem(really).But I'm curious if anyone has been contacted by an investigator wanting to look at your vech. for a "research project". I also contacted and made a report to NHTSA. I wonder how many millions of Chevy and GMC trucks are loosing their brakes and are becoming unsafe for the highways?
  • bobcampbellbobcampbell Posts: 1
    edited January 2011
    I suppose you are all heading for what I've been through. Bought my 2000 silverado 1500 in June of 2009 paid $10,000 and it only had 70k on it. Body was and is very clean. A couple of days ago I experienced a steel brakeline burst and lost my brakes. Strangely the brake light never did come on at all. The steel line was rusted completely through with the rest close behind it. I was fortunate that I was going slowly enough without much traffic so no accident.I dropped it at the shop and the mechanic called awhile later to inform me that my truck is "no Good", unsafe, not repairable, not driveable. My frame has rotted completely through. The rear crossmember rotted out and is laying on the exhaust. This is the crossmember that holds the right shock and gas tank strap. In one moment I've lost my truck. I'm not in a position to buy another and as a self-employed carpenter I need it to work. I'm in Massachusetts and I know they say our weather and road salt cause corrosion but, I've never in 30 years of driving and owning vehicles seen anything close to this. I'm actually fortunate that the brakeline went when it did because something bad would have happened had the frame come apart at speed. I've never seen a frame dissolve under a ten year old vehicle like this. I don't care what part of the world it lives in. There is obviously a manufacturing/ material defect here and those of you with this same problem will eventually and far to soon end up with an expensive piece of scrap metal. My truck now has 103k on it and is otherwise still very clean. The book value on it is somewhere between 6,500-7,000. I can only sell it for parts now and might get 1,000.
  • I was researching information on the excessive rust on the Silverado, and I came across this forum. So, like some of the other posters I thought I would add another story. I have a 99, I bought new. It has 66,000 on it. All the brakelines have rotted off, both bumpers, and last week, the frame had so much rust it broke in half. I called GM but they wouldn't do anything for me. Because the truck has so little miles I will probably buy a new frame and swap everything. From the amount of posts this sounds like a widespread problem. GM should step up like Toyota and take care of it.
  • barnowl3barnowl3 Posts: 70
    Interesting seeing these comments, as I have one of those amazing rusting GMs. I have had cars for over 30 years and live Upstate NY and we do use salt, but there is something very wrong with this truck. Rusty rear bumper, 1st month. Brake line failures within 4 years ( extensively posted on brake problem forum). PS pump and line corrosion with 4 years. Oil cooler line failure 3.5 yrs, 30,000 miles. Also replaced AC lines and tranny lines. Fuel lines repaired, but now need total replacement. SS muffler corrosion. Not all GM trucks seem to exhibit this level of rust here, so there is some defect that does not affect all trucks, but if you get one of these, hold on to your wallet.. My brake lines rusted right up to the master cylinder as if they were in a salt bath and rust was growing on them. Have never seen something this severe in this area on this new of a vehicle. There is certainly a design or manufacturing problem and it unfortunate that GM is ignoring this. How do we know the problem does not exist with 2011s, if GM keeps covering this up. I know it is 8 yrs old now, but it started within the warranty period and GM did nothing but replace the parts that I am on the 2nd round of replacement. Rather not risk another $40,000 to start it all over again, so I'll keep replacing parts for now. I'll try to get a closer look at the frame.
  • mltsurgermltsurger Posts: 102
    Does it make sense to replace all of the lines with pre-bent stainless steel.They cost about 298.00 plus the time to replace them ?
  • crusin57crusin57 Posts: 20
    edited April 2011
    Update with winter now over the roads clean and the winter salt gone i recently took my 06 Silverado to three different body shop for ( Lets call it a check up ) It seems that my rocker panels are now rusted threw and need to be repaired very soon. I find this very frustrating as even though my truck is winter rust proofed ( oil sprayed ) and even power washed at the car wash during winter months to remove the sludge and salt i still have a issue like this.

    I have posted in various areas of this Silverado form with many different issues from rust to electrical, after driving GM products for over 30 years i can honestly say this will be my last GM product, I have only had my truck for a year now and just realized that i have already done over 4 grand in extra repairs just to maintain the thing.

    I try not to come to this site much as its always bad news when it comes to Silverado trucks. and to all my fellow Silverado posters hope you have better luck than me
  • gmcustsvcgmcustsvc Posts: 4,251
    I apologize for your experience. Can you please send me your VIN?
    GM Customer Service
  • I love that a GM CS rep chimes in here but after I had to replace all my brakes and put in cunifer brake lines to resolve the Mexico metal issues with a 'not our problem' attitude from GM, I get nothing. I put my issue in to NTHSA but unless we all do GM will do nothing. I have been a Chevy guy my whole life but that is no more and my kids and friends will continue my boycott. Good Job GM. Put a few dollars in your pocket but at what cost? I see other companies out there that are replacing parts or vehicles (Ford Windstars) due to rust issues but GM states that if the vehicle lasts 1 year that is good enough for them. Please look at the (new) vehicles you see on dealer lots and if you see rust walk away. Rust does not stop on it's own. :lemon:
  • gmcustsvcgmcustsvc Posts: 4,251
    gmrustbucket ,
    I understand your frustrations with your situations. As all major companies or corporations, we have standard operating procedures. GM does handle their customers individually, not all situations are the same, so they must be handled on a case by case basis. I am here to help make GM aware of our customer’s situations. The only way I can do this is with the customer’s assistance. My first step is to gather their contact information (including a good number to reach them), VIN, current mileage, involved dealer, and a break down of what they are experiencing. The best way to get me this information is a direct email. The next step in the process is the vehicle must be taken to a GM Dealer. They have a contract with GM and must look at the vehicle. For GM to know their customers are experiencing issues, they must contact GM; whether it is me via email or Customer Assistance via the telephone. This will help identify the problem and how large it is. I understand when customers are experiencing these concerns these processes can be frustrating. All concerns, whether it is with a dealer or your vehicle, are documented in the cases set up if GM is contacted directly. Just because one person did not get the resolution they expected this should not prevent anyone from speaking with them. As most situations have variances. Any customer that would like to call Customer Assistance and speak with someone the number is in your owner manual, or email me and I can provide it to you. Any customer that would like me to assist them, please feel free to email me the information requested above.
    GM Customer Service
  • kendonhankkendonhank Posts: 61
    If you have a rust problem, you are wasting your time calling GM customer service. After you finally navigate their automated answering system, which may take a half hour, you will speak to a customer service rep who is nothing more than a note taker. They have no authority, and will tell you that they will get back to you. When and IF they get back to you, they will give you the company line, which is that GM DOES NOT COVER CORROSION CAUSED BY THE ENVIRONMENT, which if you were not aware, is ALL corrosion. If you are not satisfied with that response, they will pass you to another customer service rep, who will give you the exact same response, and on and on. I spoke to a dozen reps. Each time they promised to get back to me with a resolution, and each time they gave me the same canned answer.

    If you take your car to the dealer, the dealer will take pictures and call the GM area manager, who will tell you the same thing.

    GM has stated in court that they do not cover any corrosion caused by the environment, regardless of where in the country was purchased, how it is used, and how it is stored and maintained. If you bought it in the middle of the desert and it rusted out in a year stored in a climate controlled clean room, GM would tell you that they do not cover corrosion caused by the environment.

    Government Motors!!!!!!!!!!!!!!!!!!
  • kendonhankkendonhank Posts: 61
    We are not talking about ordinary surface rust. We are talking about an abnormal accelerated corrosion that happens to only some GM trucks. You cannot spray over it with rubberized coating. My vehicle began rusting after two months driving only on paved roads. It was a rust bucket in two years. My previous vehicle a Ford, had been parked in the same spot as the Chevy for three years and used the same way, and it didn't have a spot of rust on it.

    There IS a corrosion problem with these GM trucks.
  • kendonhankkendonhank Posts: 61
    Has GM done anything for you?
  • kendonhankkendonhank Posts: 61

    Stop pretending that GM is interested in resolving this problem.

    GM has stated in court that it does not cover ANY corrosion caused by the environment. GM will do nothing to help any of these people.

    Only the NHTSA has the power to make GM stand behind its crappy, unsafe products.
  • kendonhankkendonhank Posts: 61
    GM has stated in court depos that their undercoating is designed to last only one year, and even then only to provide cosmetic protection. Meanwhile, they tell you in the warranty that if you add an after market undercoating, your warranty is voided.

    File your complaint with the NHTSA. That is the only organization with the clout to force GM to address the problem.

    Government Motors!!!!!!!!!!!!!1
  • Toyota had a similar issue and replaced the frames on the trucks in question. The only way to tell GM to address the problem is to not buy from them. Then they will finally realize that customers do care about what they buy and will not return like I will be doing. I work in stealerships and know some of the owners / managers and GM will not do anything after your warranty is up. My suggestion to anyone with this issue is to get on the dealership service dept and keep bringing it in for this rust issue and demand it be resolved by GM. Your truck will become unsafe. Mine is now becoming a plow truck scheduled to be killed instead of the immaculate family truck it was.
  • kendonhankkendonhank Posts: 61
    Toyota only fixed the problem after NHTSA got involved.

    GM won't fix the problem until enough people file complaints with the NHTSA and there is some press coverage of the catastrophic brake line and other failures.

    GM does not care if you buy their trucks. They are too big and bureaucratic. That's why they went bankrupt the first time and why they will go bankrupt again.
  • casillacasilla Posts: 20
    I have the same problem, Rust on a 1 year old truck. Junk made to fall apart apparently?! I am not happy, and GM customer service is Bulls#@t!! You get the runaround and then told nothing can be done! I want my Dodge back!!!
  • kendonhankkendonhank Posts: 61
    GM doesn't cover corrosion. That includes the undercarriage and sheet metal.

    Their warranty is a sham.

    Government Motors!!!!!!!!!!!!!!
  • gmcustsvcgmcustsvc Posts: 4,251

    Do you currently have a case with GM Customer Assistance? If so, could you please email me the case number? I would like to look further into your situation.

    Thank you,
    Caron, GM Customer Service
  • kendonhankkendonhank Posts: 61

    Don't waste Casilla's time. GM does not cover corrosion under its warranty, and will do nothing to help Casilla.

    There is nothing you can do as a GM customer service rep except give Casilla the run around. You have no authority to do anything, and GM has already stated that it does not cover ANY corrosion due to the environment, which is ALL corrosion. This is company policy and you can do nothing to change it.

    Government Motors!!!!!!!!!!!!
  • casillacasilla Posts: 20
    I had a case # but I got frustrated playing phone tag with Racheal from customer service in Durham NC. It took 3 weeks of calling and when we finally connected, I was told that nothing could be done. Why should I have to spend money to fix a new truck? If I do undercoat it myself, the warranty by the book says it will be void!!?? I do believe that your policy is to make a truck that is built to fall apart quickly. This was my first brand new GM truck and probably my last.
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