2011 Silverado Undercoating Peeling Off

c0boy · February 14, 2014

So, I'm not super anal, but I noticed my undercoating peeling off. In the pic below I was able to just pull it off. The truck has 17, XXX miles on it so this concerns me. Should this be happening and what can be done? Is this a warranty issue? Thanks in advance

MS3DALE · February 14, 2014

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Service Information

Document ID: 3611659

#PI0564D: Wax Coating on Frame Peeling, Metal Shows Corrosion/Rusting - (Sep 5, 2013)

Subject: Wax Coating on Frame Peeling, Metal Shows Corrosion/Rusting

Models: 2011-2014 Cadillac Escalade Models 2011-2014 Chevrolet Avalanche, Express, Silverado (All Series), Suburban, Tahoe 2011-2014 GMC Savana, Sierra (All Series), Yukon, Yukon XL

This PI is being revised to add the 2014 model year, update the Recommendation/Instructions, Parts information and update the Labor Operation to the Global Labor Code (GLC). Please discard PI0564C.

Condition/Concern

Some customers may comment that areas of the frame wax coating are peeling off and rust/corrosion is visible on the metal in these areas. Several examples of this condition are shown in each group of graphics below.

Truck Example Photos

Van Example Photos

Recommendation/Instructions

A combination of specialized metal coating products manufactured by Lloyds and Daubert have been found to be the most suitable products to provide corrosion control and protection to address this type of repair. Our recommendation is to prep the metal surface using *Lloyd’s Pure Prep™ Metal Surface Preparation P/N 25418, then topcoat with both *Lloyds Kryptonite Metal Treatment P/N 36502 Life Long Rust Protection and *Daubert Non-Rust® P/N X-121B One Coat Rust Preventative Coating. It is strongly recommended they be applied according to the manufacturer’s procedures.

*We believe this source and their products to be reliable. There may be additional manufacturers of such products/materials. General Motors does not endorse, indicate any preference for, or assume any responsibility for the products or material from this firm or for any such items that may be available from other sources.

Important: To ensure proper coating performance, all of the manufacturer’s “Applications Guidelines” MUST be followed.

Prep the frame and apply the Lloyds and Daubert coatings following the steps below:

Important: Any corrosion damage noted to the extent of weakening the component will require component replacement.

Important: Lloyds Kryptonite is designed to apply directly onto brown rust or clean surfaces; however any loose flakes/scale of rust need to be removed prior to application.

Important: The frame must be dry and free of wax/oily substances prior to application of the new coating.

Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
If labels are in the area to be reworked, remove any of the visible white labels on the frame (usually one per side).
Remove any components as required to gain access to the corroded component or area.
Determine a start and finish point on each side for the section/area of the frame to be repaired.
Using a rag and wax/grease removing solvent, remove the wax coating and any grease, oil, or undercoating from the truck frame in the affected repair area. The graphic above shows an example of a small portion of the wax coating removed.
Any loose rust or loose flakes should be scraped, wire brushed or ground off.
Remove any residual wax, oil or rust by wiping the frame down with a towel or Scotch-Brite™ (3M) pad soaked with wax/grease remover.
Using Lloyd’s Pure Prep™ Metal Surface Preparation P/N 25418 (10 fluid ounce bottle), or equivalent, saturate a towel or Scotch-Brite™ (3M) pad with the pre-diluted solution and scrub the area well, rendering a foaming of the Pure Prep.™ This will greatly improve adhesion and corrosion resistance in the repair areas.
Using a water dampened clean towel, remove any residue and dry the affected area. Dry the repair area completely using an air hose to blow dry the frame.
Check the repair area for phosphate treatment by wiping it to see if any corrosion residue can be picked up. Correctly treated areas will not have any residue on the surface.
Apply a light flash-coat of Lloyds Kryptonite Metal Treatment P/N 36502 Life Long Rust Protection (14 ounce aerosol), or equivalent, to all rusted and bare areas of the frame where the wax coating was removed. This first coat should flash in approximately 3-5 minutes.
Apply a second coat of Lloyds Kryptonite. This can be a heavy coat; double and triple passes with this product, over a light first coat, are not a problem.

Note: Dried Lloyds Kryptonite will perform beautifully over time and actually get harder and more durable as it experiences heat.
We suggest top coating the Lloyds Kryptonite with Daubert Nox-Rust® P/N X-121B “One Coat Rust Preventative Coating” (aerosol), or equivalent.

Note: As shown in the graphic below, besides adding a corrosion resistant layer, it dries to firm, wax-like film which will more closely resemble the appearance of the unrepaired areas of the frame.
Lower the vehicle and allow the final coat to dry as recommended by the manufacturer.

Parts Information

Dealers should obtain 25418 and 36502 by contacting Lloyds by e-mail at [email protected], or by calling 1-800-361-6766.

U.S. Dealers can obtain the X-121B topcoat by contacting the Daubert website at www.daubertchemical.com or inside the U.S. only, by calling 1-800-914-0034.

Canadian dealers must contact the Daubert distributor in Canada, Corrosion Control Coatings Ltd, by faxing the form below to 519-881-2309.

Important: ONLY Canadian Dealers should use this form.

Warranty Information

For vehicles repaired under warranty, use Labor Operation below and include material cost.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

gmtech4 · February 15, 2014

So, I'm not super anal, but I noticed my undercoating peeling off. In the pic below I was able to just pull it off. The truck has 17, XXX miles on it so this concerns me. Should this be happening and what can be done? Is this a warranty issue? Thanks in advance

not ? ,,,,lol

im glad there is a TSB thou lol

GMCustomerService · February 15, 2014

c0boy,

Hello! I am sorry to hear that you are experiencing an issue with your vehicle. I cannot guarantee anything but I would be happy to work with your preferred dealership and resolve this issue. Please private message me referencing this thread if I can be of any assistance.

Jennifer T.

GM Customer Care

bird38 · February 15, 2014

Im PISSED about mine. I have 30k miles on my 2011 and ive never seen more rust on a new vehicle. My back bumper is rusting....

Its making my denali look like complete shit. My local dealer was no help at all. I shouldnt have to pay to fix rust after i just dumped a ton on a truck.

c0boy · February 16, 2014

c0boy,

Hello! I am sorry to hear that you are experiencing an issue with your vehicle. I cannot guarantee anything but I would be happy to work with your preferred dealership and resolve this issue. Please private message me referencing this thread if I can be of any assistance.

Jennifer T.

GM Customer Care

I sent a private message to you

bird38 · February 17, 2014

Bumping this thread back up.

After talking to the customer service rep my local dealer called me. I explained my situation and said that multiple people have this problem and there was a TSB out for it. He went on to tell me that if the vehicle was in an accident that this would happen (no accidents, ever.) and since i live in the northeast that rust would occur in 10k miles. I love how these guys at the dealership think they are talking to complete idiots. Little did he know on the other side was a mechanic. So then he wanted me to look up the document number on the TSB! Thats not my job!? I doubt they are going to fix it...

My tax dollars go out to bail a company and in return i get a rusty truck shortly after new. After spending a ton of money on my dream truck its been nothing but problems.

c0boy · February 17, 2014

Bumping this thread back up.

After talking to the customer service rep my local dealer called me. I explained my situation and said that multiple people have this problem and there was a TSB out for it. He went on to tell me that if the vehicle was in an accident that this would happen (no accidents, ever.) and since i live in the northeast that rust would occur in 10k miles. I love how these guys at the dealership think they are talking to complete idiots. Little did he know on the other side was a mechanic. So then he wanted me to look up the document number on the TSB! Thats not my job!? I doubt they are going to fix it...

My tax dollars go out to bail a company and in return i get a rusty truck shortly after new. After spending a ton of money on my dream truck its been nothing but problems.

Have you opened a CS ticket with GM? If not I recommend it, to get it on the "radar" of GM's customer service. I have started this process for this issue and will see where it ends up.

MB2008LTZ · February 17, 2014

My 2008 was doing this by the spring of 2010....nothing new here except that GM has crap rust protection and a lot of crappy dealer service departments

redtherocket · February 17, 2014

My 2013 is a mess.

I had it undercoated as what the dealer said and it made it worse, weakening the wax...

This truck is horrible.... Worst new vehicle I've ever bought, and worst dealership ever.,.

I wish I had a ****in time machine.

bird38 · February 18, 2014

Yea I have a CS number that they gave me.

The thing that I hate is if you didn't buy the truck from that specific dealer than they want nothing to do with you! What makes them think if they treat me like shit now that I'll ever buy anything from them?!

If they can't fix this small issue I don't think ill ever buy a new GM again.

Mustang183 · February 18, 2014

I noticed several areas where the undercoating was peeling off on my 2013 within 2 weeks of buying it!! I touched the rusted spots up with paint for now but after seeing this TSB I may bring it up to my dealer! My 2003 F-250 didn't have as much rust after 10 years!

c0boy · February 18, 2014

Yea I have a CS number that they gave me.

The thing that I hate is if you didn't buy the truck from that specific dealer than they want nothing to do with you! What makes them think if they treat me like shit now that I'll ever buy anything from them?!

If they can't fix this small issue I don't think ill ever buy a new GM again.

I hear you, I moved far away from the dealer where I bought this truck. Also, not sure if you bought a Ford/Ram/etc and took it too another dealer for warranty that it would be better outcome. All depends on the dealer.

mike94silverado · February 18, 2014

I buy a few $5 cans of 3m Undercoating and go to town every spring. Not a big deal. Typical GM corner cutting "wax" coatings.......

c0boy · February 20, 2014

GM's customer service contacted the dealer that I have been using for servicing (I did not buy the truck there) and they called me today. The wife and I are going away next week so I won't be able to bring it in until then. will keep everyone posted.