Last post on Dec 03, 2013 at 11:13 AM
You are in the Chevrolet Silverado & GMC Sierra
What is this discussion about?
Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, Truck
#127 of 230 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.
#128 of 230 Re: Sigh, on to the restoration... [hball01]
Oct 23, 2011 (10:07 am)
I am wondering how you made the repair on your truck? Our problem is the crossmember that holds up the gas tank, and GMC service says there is no way to replace the part as it is part of the frame. We were going to try and weld something ourselves and I am wondering how you made out with your truck.
#129 of 230 2009 GMC Sierra 2500HD
Oct 27, 2011 (5:14 am)
Has anyone experienced the factory undercoating falling off after using another brand of rust inhibitor?
We applied a rust inhibitor to a 2009 Sierra and the product we applied as well as the factory undercoating literally fell off the vehicle.
This cannot be normal.
Any suggestions on what be done?
#130 of 230 Re: 2009 GMC Sierra 2500HD [cookn1]
Oct 27, 2011 (9:19 am)
I apologize for your frustrations. I would recommend speaking with you dealer of choice. Please update me on your situation.
GM Customer Service
#131 of 230 Re: 2009 GMC Sierra 2500HD [cookn1]
Oct 27, 2011 (10:53 am)
I'm sorry you're having a problem also. My truck is a 2001 Chevy Silverado 2500HD. If GM is still using the same frame wax, not much to say. It comes off if you bump it. you can scrape it off with your finger nail. My favorite method recently has been mineral spirits. It's like a solid grease. I'm surprised anything sticks to it. Salt will just find a hole in your under coating and penetrate this stuff like butter. Once the salt gets through to the metal, it spreads sideways and your coating just falls off.
My suggestion is to scrape if all off, then paint on POR-15. Either stop there or add additional rust proofing. Otherwise, it will never stop coming off - if you live in a northern state like me. I would suggest lots of elbow grease, and limit your comments about GM. they don't see the problem as broken.
#132 of 230 Re: 2009 GMC Sierra 2500HD [cookn1]
Oct 27, 2011 (8:09 pm)
Have the rust issue on the rear rails of a 2008 Silverado.
I wire brushed the rails (at the rear bumper mounts) and applied a coat of sprayed flat enamel to cover the area. So far - its held up nearly a year.
The rest of the frame is mint- just the very rear of the rails where it caught the salt.
#133 of 230 rocker panels for 2001 1500 siera
Oct 30, 2011 (1:38 pm)
im looking to buy some rocker panels for my truck its a 2001 gmc siera 1500 with crew cab any ideas guys for places i live in ri thank you
#134 of 230 Re: 2009 GMC Sierra 2500HD [hball01]
Dec 05, 2011 (5:38 pm)
Wow how did you clean up your frame so nice? Did you sandblast or just scrape it off? I really want to clean up the frame on my 1998 to have it last a long time. Did you spray the por15 or roll it? What did you do for primer? Does it last a long time and protects well? Thanks
#135 of 230 Re: 2009 GMC Sierra 2500HD [chevman828]
Dec 06, 2011 (7:29 am)
Lots of man hours and determination. I wouldn't recommend it for the faint of heart. I used mineral spirits, a rag, and a putty knife to scrape all the cheesy wax off the frame - down to the bare metal. Then I used a small hand grinder (4.5 to 5.5 inch) with knotted wire brushes to knock the rust off the best I could. They use POR-15 (google it), which is a 3 step process: grease/dirt cleaner, acid etch, POR-15 paint (2-coats, brush it on; itís self leveling and looks like you sprayed it on). To do it right, I had to dissemble some parts: springs, shocks, some other small parts. On surfaces that are visible to light, which affects POR-15 discoloration, I sprayed with rustoleum flat black and/or rubberized undercoating to reduce chipping from rocks. Iíve also completed the entire underside of the truck box, disassembled and completed the inside of the rear bumper and trailer hitch. All that work, and I just completed the back half of the truck. Iíll do the front half next year because I need the truck now. The crying shame about all this is that GM could do this at the factory a lot easier than we can. I can understand cost and weight considerations on their part, but at least give us an option of paying for a top notch rust prevention system Ė not just a rubberized spray over of the wax cheese, which falls off anyway. Get it together GM! We can put a man on the moon, but we canít make something that wonít rust out in a couple of years? I can do it, why canít GM?
#136 of 230 2008 Escalade accelerated rust
Dec 10, 2011 (7:17 am)
I have followed the posts and threads on the undercarraige rust issue with GM. I own 2 cadillac escalades. One I purchased brand new in 2007 and another purchased in 2008 which I traded my 2002 in for the brand new 2008. Within a year the brake roter rusted completely and peeled and warranty replaced. Again, within a year another set of rotors or rotors and brakes rusted out, now on third set of rotors were replaced, again under warranty as dealer said GM has had rotor issues. Each time escalade was taken to the dealer for all work. Now, for a year we have had a nightmare with undercarraige rust. Entire frame is rusted, ignition coils rusted out and were replaced, both manifolds rusted so bad the bolts busted when they tried to replace them. The lines have rusted out, all replaced under warranty but now eith 29,000 miles on this excalade the warranty ran out in November. I am fighting with GM, and due to go to court in January. Has anyone gone thru the court process and can weigh in what the result was. With only 29000 miles the vehicle is unsafe to drive. an expert looked at it and said it is the worst case of rusted undercarraige he has ever seen. I know this is a mealurgical issue with the 2008 frames as my 2002 and 2007 with 73000 miles has no rust. The 2008 frame, undercarraige, hinges, even the brackets under the hood are rusted and bubbling. I have a 2007 Toyota Tundra that has been in and out of strip jobs, off road in mine pits, sits next to the escalade in the driveway each night and not a bit of rush anywhere and it has 196000 miles. I am contacting the NHTSA and filing a complaint and holding my breath for what the outcome will be in court as the GM experts will testify that there are no rust history with GM undercarraiges. The Sierra is living proof that there is a metalurgical problem and GM should step in and do a recall. I have photos that tell the whole truth. Wife doesnt even drive it when the roads are bad, wont go on ice and minimal salt came in contact and it was always throughly washed. There must be an issue with the 2008 escalade frames and undercarraige. any thoughts?