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You are in the Chevrolet Silverado & GMC Sierra
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Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, Truck
#118 of 231 When did Chevy decide not to paint their frames?
Sep 26, 2011 (2:11 pm)
Iím new to this forum. Sorry for the long post: I started researching a rust problem on my truck, and it didnít take long for find this discussion. My truck is a 2001 Chevy Silverado, 2500 HD, and has only 33K miles. I bought it brand new. With low mileage, Iím expecting it to last my lifetime. Most of the driving lately has been Wisconsin winter driving Ė when my Honda canít make it on fresh snow. Lately, Iím venturing into summer driving with a truck camper. I started getting tired of the rust spots on the driveway. I should have applied undercoating when I bought the truck, but couldnít afford it nor had time for it as I was building a house. Now itís time for the truck fix. Again, I canít afford it, so Iím doing it myself. I have the truck bed removed (I have a cherry picker), the bumper, trailer hitch, and gas tank dropped, so I have good access. Iím shocked at what Iím seeing. The metal frame is still good. Iím using an electric wire brush and grinder to remove the rust, but the time consuming part is Iím having to remove factory under coating from the frame with mineral spirits and a rag. Guess what? They did not paint the frame. Let me repeat that: they did not paint the frame. Water and salt is burrowing through the undercoating and attacking the naked metal. Then, itís burrowing sideways, and the undercoating is coming off in sheets Ė as well as chunks of rust. My goal for this year is to restore the back half of the truck Ė frame, suspension, even the underside of the truck bed Ė anything that looks rusty. Next year, Iíll do the front. Once the metal is cleaned, Iíll put multiple coats of rustoleum primer, then multiple coats of rustoleum enamel, then undercoating again. The frame is well rusted, the brake calipers are well rusted. The differential and axel is well rusted. Last year, I replaced the brake rotors all around because they rusted out Ė before the original brakes were worn. The shocks are unrecognizable, but still manage to work. Iíll be replacing them. The brake lines had a level of corrosion I was able to knock off, and will be putting a sealer on. Iíll be keeping an eye on those Ė Iím sure Iíll have to replace them one day. Heck, maybe theyíll make it to 40K miles. There is a galvanized side plate on the center side of the plastic gas tank Ė probably to protect the gas tank from things flying off the drive shaft. Hard to tell from the rust. Iíll knock that clean and spray rustoleum galvanizing spray on it. The bottom line is, they skipped the painting part and went for an undercoating instead. As I walk through parking lots, and look under trucks, I see well protected painted and undercoated undersides. Theyíre not GM or Chevys. I see aged Dodge Rams that are painted, without undercoating, and they still look reasonable. Thatís because they were painted. I look under CM and Chevys and all I see is rust. Now, I know Chevy doesnít warranty the elements. My question is when did they start, and how long did it go on, when they decided not to paint the frame and underside? Iím not an expert, but Iíve been around the garage a time or two. Seems like painting the metal would be job one. Iíll bet they are painting their frames now, before applying undercoating. Next time I buy a truck, assuming I canít keep this bucket rolling, Iím going to scratch the undercoating from the frame to see if I find any paint. Am I wrong about this?
#119 of 231 Re: When did Chevy decide not to paint their frames? [hball01]
Sep 26, 2011 (4:11 pm)
GM has testified in court that the wax undercoating is designed to last only one year and is for cosmetic protection only. Basically, they rely on the bulk of the metal to keep the frame intact for the life of the vehicle. Not all GM trucks are rusting like yours and mine. It is definitely a subset, and I can't explain the reason. My guess is there is some kind of electrical circuit (anode/cathode) that inadvertently forms in some of the vehicles that accelerates the corrosion process in certain vehicles.
Oct 09, 2011 (11:09 am)
Does anyone know where we can find a new frame for a 1990 Chevy Silverado stepside, short box?
#122 of 231 Re: PLEASE AVOID GM [kendonhank]
Oct 17, 2011 (6:47 pm)
We just found out today that our 1999 Sierra not only has the rusted out brake lines, but also has severe frame damage due to rusting. This is an absolute heartache financially for our family. GMC says frame can not be fixed??? It's the crossmember of the frame.... I can't believe this can not be fixed..... I am physically sick over this. Do you know of a fix for this issue?
Thank you so much.
#123 of 231 1999 GMC Sierra rusting frame
Oct 18, 2011 (5:40 am)
GM seems to have a huge issue with their frames prematurely rusting out, causing a very dangerous situation. The NHTSA did a recall investigation, but closed the case jan 2011 ....NO recall. Strange that no recall was issued for this, but I see the Toyota Tundra had the same issue and recalled all affected trucks. Why was Toyota required to recall their trucks, but not GM??????? This is a dangerous, expensive, and frustrating problem that GM and the NHTSA should address and fix. If anyone else has this issue ( and I know there are a lot of you ) I would like to get the information together as a group and try to force GM to take responsibility for this problem. Thanks Patti
#124 of 231 Re: 1999 GMC Sierra rusting frame [pattipie3]
Oct 19, 2011 (2:21 pm)
I'm in my truck is a rust box
#125 of 231 Re: PLEASE AVOID GM [pattipie3]
Oct 19, 2011 (2:26 pm)
Had the same problem. I took the bed off and found a buddy that could weld went and bought some schedule 40 fence poles and flat steel then spent the day repairing Gm's crap frame still holding up now I need to do the rotted out rocker panels
Oct 19, 2011 (3:25 pm)
I have welded patches, and patches from front to back. I rebuilt the body with new GM parts 3 years ago. If I could find a NEW frame, I would put a crate motor in and have a brand new truck. I just can't find a new frame.
#127 of 231 Re: PLEASE AVOID GM [mrstevens1000]
Oct 21, 2011 (3:44 am)
GM service dept. won't touch it, so we are looking into making the same sort of repair that you have done...... thankfully we have a good friend who has a welding tool ( I am in the process of trying to find the metal as you did ) Did you happen to take any pictures of your repair???
I am still planning on trying to get people to one central location to file a formal complaint together, as there is power in numbers, so please keep checking back to this posting for updates.. and thank you for your reply.