Frame Wax/Undercoating

TheElementalCashew · May 1, 2014

This thread made me curious, so I crawled under my truck today and checked out the coating. I couldn't find a single area where the coating was flaking or coming off, or appeared to be damaged at all. Only a couple bolts on the leaf springs were slightly rusty. In all fairness, my truck had only seem Texas rain, and sand/salt/snow a few times over the winter. I've owned it since last July. Silverado LT Crew Cab Z71 4x4 with a build date of 5/13.

snarkee · May 9, 2014

Dealer just put a 6 inch lift on a lot silverado crew. The edges of the front suspension and rear well wheel edges we're rust coloured. Looked like azz

tbarn · May 10, 2014

Unless you can see it without crawling under the truck, I fail to see an issue. I raise GM trucks of all ages everyday. They all have rust on the frames, differentials, drive shafts etc. Never seen one rust through and I'm in salt country. To me its just cosmetic.

Edited May 10, 2014 by tbarn

2017SierraSLT · May 11, 2014

The wax coating is sold by GM parts under part number 12346501. It is an excellent match to the OEM applied stuff.

14SilveradoZ71 · May 14, 2014

took my moms truck in today to have them look at this issue was told that it was normal but they will fix it my truck is also having the same issue

heres pics of my 2014 crew cab 5000 miles next 2 pics are of my moms 2013 crew cab only 6000 miles and the last two are my brother 2012 ext cab with 13000 miles his looks almost brand new besides the one spot on the driver side

mc2032 · May 18, 2014

after reading this post i checked the frame rails on my 5000 mile 2014 standard cab 4x4 silverado work truck. yes, i have rust spots where the wax is peeling off. looks terrible and i doubt the frame outlives the truck. but what really has me worried are the emergency brake cables rubbing on a frame clip. obviously GM knows about it because my truck has rubber sleeves over the cables where they rub the clip. you'd think they'd move the clip, re-route the cables or hey, better yet, move the wire hanger they installed about 6-8 inches aft of the clip. i am thinking that is what i am going to do. gm - fail. i have a couple gallons of LPS and i will foam brush some of it on the rust. who ever thought up this wax stuff needs his head examined.

Trackermi · May 18, 2014

GM in general needs their head examined. I have 19k miles. Mine are not spots, they are sections. It's pretty bad to say the least for a 9 month old truck. Probably the worst on this forum due to an early owner and in a winter / salt area.

I wish I would have kept my avalanche... Just frustrating dealing with piss poor products at the price these things go for.

Sent from my iPad using Tapatalk HD

Edited May 18, 2014 by Trackermi

mc2032 · May 18, 2014

question for GM, will this wax undercoat ever set up or dry? if not, is there anything that can be done to it, sprayed on/over it to seal it? i read on a previous post GM is clear coating the wax undercoat on some models. any chance i could have my truck done too?

geoluk · May 19, 2014

There is a "bullitin" at the dealers for the fix. Mine is going in today 5/19/14, to be fixed.

mc2032 · May 27, 2014

do you know what the bulletin from the dealership addresses? is it to "fix" the rust areas or overcoat the forever sticky wax undercoating?

can anyone share their DIY repair/cover ideas/solutions? thanks in advance.

pfmg · May 27, 2014

threre is 2

#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

#14002A: Service Update for Inventory and Customer

Vehicles - Underbody Appearance - Expires with Base

Warranty - (Feb 10, 2014)

Subject: 14002A – Service Update for Inventory and Customer Vehicles —

Underbody Appearance – Expires with Base Warranty

Models: 2014 Chevrolet Silverado 1500

2014 GMC Sierra 1500

This bulletin has been revised to increase the allowable per vehicle “Net Item” amount for

the Daubert Nox-Rust® and Lloyds Kryptonite Metal Treatment®.

This service update includes vehicles in dealer inventory and customer vehicles that return to

the dealership for any reason. This bulletin will expire at the end of the involved vehicle's

New Vehicle Limited Warranty period.

Purpose

This bulletin provides a service procedure to inspect and, if necessary, repair the appearance of

underbody components on certain 2014 model year Chevrolet Silverado 1500 and GMC Sierra

1500 vehicles that may not meet GM appearance requirements for new vehicles. These vehicles

may exhibit signs of premature surface degradation on certain underbody components.

2017SierraSLT · May 27, 2014

do you know what the bulletin from the dealership addresses? is it to "fix" the rust areas or overcoat the forever sticky wax undercoating?

can anyone share their DIY repair/cover ideas/solutions? thanks in advance.

I had a couple of spots that were beginning to peel on my truck. I removed the loose wax, fully cleaned the areas, and applied the same stuff, but in an areosol can, GM part number 12346501. It was an almost perfect match.

14SilveradoZ71 · May 29, 2014

#PI0564D

Edited May 29, 2014 by 14SilveradoZ71

14SilveradoZ71 · May 29, 2014

#14002A

BlaznSaddles · May 30, 2014

Yep, I am going to have to take my truck in for this repair. I take it will take 2-3 days to complete. Add paint repair to the insider driver's door that bubbled up and is exposing the primer. Guess I will be driving a rental for about a week. The sad thing is that I have to drive 160 miles to get this repaired. The good news is that I will be in a city where the repairs can be done for a couple of weeks. The scary part is that they have to remove the bed and other parts in order to make this repair.