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Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Undercarriage Rust
17 messages, Last post on Oct 03, 2009 at 4:02 PM
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Replying to: blurry25 (Apr 15, 2008 10:26 pm) I have a 2005 Silverado 2500 and the entire undercarriage is corroded. Started to get bad after about a year. I live in coastal FL. I have deposed the GM corrosion engineer who developed the spec for the wax undercoating. GM does not apply this coat. It's suppliers do, and some parts are uncoated. He says its for cosmetic protection only and only designed to last a year in the worst environments (GM designs its coating for what it calls the 95th percentile of environments). After that, GM expects the coating to flake off and the vehicle to corrode. GM refuses to cover undercarriage corrosion because they say it was caused by the environment. Duh. All corrosion is caused by the environment. GM also says that their bumper to bumper warranty doesn't cover undercarriage corrosion, only sheet metal. This is not true. The bumper to bumper warranty covers everything except that which is not specially excluded, and there is no exclusion for the undercarriage. There is an exclsuion for corosion caused by airborne fallout, but GM is claiming that salt and even rain count as airborne fallout. Note that GM added a further exclusion for sea air and road salt to its 2007 warranty. It shows they know their vulnerability. GM should repair your vehicle or give you a new one under the warranty, but they won't. That business with the black paint is nonsense. The dealer made it up. Either that or GM has really stepped in it. Can you get me the number of that TSP. Also, can you tell me where you live? State and proximity to salt water. Do they use road salt. What is the extent of the corrosion. You may be able to get relief based on the outcome of my case. I'm thinking it might even develop into a class action. I believe GM is misleading the public about its corrosion vulnerabilty and warranty.
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I have a 2005 Silverado 2500 and the entire undercarriage is corroded. Started to get bad after about a year. I live in coastal FL. I am suing GM for this right now. Case goes to court in two weeks. I have deposed the GM corrosion engineer who developed the spec for the wax undercoating. GM does not apply this coat. It's suppliers do, and some parts are uncoated. He says its for cosmetic protection only and only designed to last a year in the worst environments (GM designs its coating for what it calls the 95th percentile of environments). After that, GM expects the coating to flake off and the vehicle to corrode. GM refuses to cover undercarriage corrosion because they say it was caused by the environment. Duh. All corrosion is caused by the environment. GM also says that their bumper to bumper warranty doesn't cover undercarriage corrosion, only sheet metal. This is not true. The bumper to bumper warranty covers everything except that which is not specially excluded, and there is no exclusion for the undercarriage. There is an exclsuion for corosion caused by airborne fallout, but GM is claiming that salt and even rain count as airborne fallout. Note that GM added a further exclusion for sea air and road salt to its 2007 warranty. It shows they know their vulnerability. I believe GM is misleading the public about its corrosion vulnerabilty and warranty. Let me know if you are having corrosion problems with your GM vehicle. Together, we can hold GM accountable. |
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looking at my frame last weekend i noticed the wax peeling off rusting members from stem to stern. warranty service doesn't seem like a likely option - any ideas? (nbs1500wt, 2008)
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Replying to: x_silverado_x (Jun 29, 2009 4:09 pm) Sorry about the extra post I had to delete.. I'm new here..just trying to figure out how the boards work. |
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Replying to: x_silverado_x (Jun 29, 2009 4:09 pm) I am currently suing GM right now for this very problem. I live in coastal FL and have extensive corrosion throught the undercarriage. GM refused to cover under the warranty because they say it was caused by the environment. Of course it was. All corrosion is caused by the environment. FYI. I have deposed the senior GM manager from Michigan who developed the coating spec for the undercarriage wax coating. He says it was only designed to last and protect the vehicle for a year in the most hostile environments (the 95th percentile as they call it), and that GM fully expects the coating to fail and the vehicle to begin corroding after a year. GM added an exclusion for corrosion due to sea air and road salt in the 2007 warranty. I have a 2005, which does not have this exclusion (they clearly added it because they knew their vehicles were vulnerable). Yet they still will not cover it, claiming that there is an exclusion for airborne fallout (they consider salt in the air and even water in the air to be airborne fallout, though it does not say this in the warranty). The warranty is a sham and I believe I will win in court two weeks from now. Can you give me more info about your vehicle. My action may help you.
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Replying to: kendonhank (Sep 17, 2009 10:36 am) 
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Replying to: kendonhank (Sep 17, 2009 10:36 am) I worked as a body repair person for quite some time and one was a slap it together joint where we "fixed" vehicles being sold, resold and resold again by used car lots. Many were GM models full of rust and quite often BIG rust holes were covered with fiberglass and nothing more..the first big bump and your car suddenly has a gaping hole in it. While this is not the same as a new vehicle it just shows that the auto industry in their zeal to sell more and more new cars and trucks build them to last as short a period as possible. Remember, GM invented "planned obsolescence" with the infamous Corvaire. Don't let them forget that period of GM's history in court. It appears that they have changed nothing and it's why GM needed a massive bailout..again. |
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Replying to: x_silverado_x (Sep 17, 2009 11:54 am) The GM corrosion expert I deposed said that widespread corrosion under the vehicle would not be covered anywhere in the U.S., even in a desert. How extensive is the corrosion. Where are you located? Have you used the vehicle off road. Do you garage it, wash it, etc.
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Replying to: kendonhank (Sep 18, 2009 9:35 am) how does one measure corrosion? wax has pealed off every inch of the frame revealing a rust colored surface chicago area, never off road, but municipal road crews use salt in the winter
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Replying to: kendonhank (Sep 17, 2009 11:45 am)
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