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Chevy Silverado and GMC Sierra Undercarriage Rust

208 messages,  Last post on May 05, 2013 at 10:09 PM

You are in the Chevrolet Silverado & GMC Sierra Forum.

What is this discussion about? Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, Truck

Messages Page 14 of 22

#124 of 208 Re: 1999 GMC Sierra rusting frame [pattipie3] by mrstevens1000

Oct 19, 2011 (3:21 pm)

Replying to: pattipie3 (Oct 18, 2011 6:40 am)
I'm in my truck is a rust box

#125 of 208 Re: PLEASE AVOID GM [pattipie3] by mrstevens1000

Oct 19, 2011 (3:26 pm)

Replying to: pattipie3 (Oct 17, 2011 7:47 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

#126 of 208 frame by lh1010

Oct 19, 2011 (4:25 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 208 Re: PLEASE AVOID GM [mrstevens1000] by pattipie3

Oct 21, 2011 (4:44 am)

Replying to: mrstevens1000 (Oct 19, 2011 3:26 pm)
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 208 Re: Sigh, on to the restoration... [hball01] by pattipie3

Oct 23, 2011 (11:07 am)

Replying to: hball01 (Sep 27, 2011 11:26 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.
 
Thank you
Patti

#129 of 208 2009 GMC Sierra 2500HD by cookn1

Oct 27, 2011 (6:14 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 208 Re: 2009 GMC Sierra 2500HD [cookn1] by gmcustsvc

Oct 27, 2011 (10:19 am)

Replying to: cookn1 (Oct 27, 2011 6:14 am)
cookn1,
I apologize for your frustrations. I would recommend speaking with you dealer of choice. Please update me on your situation.
Christina
GM Customer Service

#131 of 208 Re: 2009 GMC Sierra 2500HD [cookn1] by hball01

Oct 27, 2011 (11:53 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.
 
Before:
http://www.flickr.com/photos/68076540N08/6189661400/
http://www.flickr.com/photos/68076540N08/6189660480/
 
After:
http://www.flickr.com/photos/68076540N08/6286917982/
http://www.flickr.com/photos/68076540N08/6286917852/

#132 of 208 Re: 2009 GMC Sierra 2500HD [cookn1] by 2doorpost

Oct 27, 2011 (9:09 pm)

Replying to: cookn1 (Oct 27, 2011 6:14 am)
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 208 rocker panels for 2001 1500 siera by jsweetguy320

Oct 30, 2011 (2:38 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

Messages Page 14 of 22

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