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Frame Wax/Undercoating

eric.warner.549
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Silverado-Hareek
Silverado-Hareek

Most likely. I swear this is the last first edition vehicle I ever buy from any manufacturer. If it hasn't been out for at least a model year or 2, I'm walking away.

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My 2014 Silverado z71 ltz was a lemon. The frame rust was the final straw. I fixed mine by trading it in on a new ram. After 25 years of GM trucks, I have to say that it was like losing an old frien

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2015 Ram Sport Crew Cab 1500 4x4. Love it. My Silverado started showing problems after day one, little things, then bigger, then frame rust and that was enough for me. Took a loss, but I walso

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pm26 Senior Enthusiast

pm26

Posted
Posted (edited)

It's a fully boxed frame, not c channels. That's one of the reasons they dip it in wax to properly cost the interior surfaces of the boxed frame.

 

 

Sent from my iPhone using Tapatalk

Sorry, I was describing my 2006 Silverado frame. A fully boxed frame is of course stiffer than a C channel frame, but most likely it also is a great contributor to vibration issues. A C channel frame has better ability to flex and to absorb road vibrations.

 

Anyway, here is a frame rust video clip I found:

 

 

 

Edited by pm26
redwngr Senior Enthusiast

redwngr

Posted
Posted

It's a fully boxed frame, not c channels. That's one of the reasons they dip it in wax to properly cost the interior surfaces of the boxed frame.

 

 

Sent from my iPhone using Tapatalk

They have used wax dipped since at least the GMT800's.

 

Front section has been a hydroformed tube since then as well.

Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted

Sorry, I was describing my 2006 Silverado frame. A fully boxed frame is of course stiffer than a C channel frame, but most likely it also is a great contributor to vibration issues. A C channel frame has better ability to flex and to absorb road vibrations.

 

Anyway, here is a frame rust video clip I found:

 

 

 

 

I never had any vibration issues with my 2007 fully boxed frame and my current 2014 doesn't have any vibration issues other than the tires occasionally depending on the temperature outside. That will go away for good when I replace the tires. The vibration issues people are having with these trucks are related to the drive train and the frame won't change those conditions if something is out of balance or a part is failing the rear differential. I'd rather have a stiffer frame than one that flexes any day of the week.

 

I personally don't have a problem with the wax coating if it's applied correctly. It was never an issue on my 2007. My dad's 2003 suburban barely has any rust on it because Chevy did a better job then of applying the wax and probably used a better product as well. Guys up north with heavily salted winter roads should worry more with their 2014 and up trucks but if you're around the Virginia latitude and south, you should be ok. It will be 20+ years before rust becomes a structural issue in these areas of the country and this truck will be long gone by the 10 year mark if that.

Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted

They have used wax dipped since at least the GMT800's.

 

Front section has been a hydroformed tube since then as well.

 

I think they've been using wax longer than that. Late 80's early 90's maybe? I feel like I read that somewhere I don't know for sure though.

black00ta Enthusiast

black00ta

Posted
Posted (edited)

The undercoating on my 15 is great, zero rust and the coating is durable...must have been an early build issue?

Edited by black00ta
navinke Enthusiast

navinke

Posted
Posted

So Frustrated!!!

My dealer painted two small patches in rear wheel wells and basically said there was no TSB.

Guess they figured I wouldn't check out the rest of the frame when I had a chance.

Now dealing with GM customer service...basically playing phone tag for a week.

 

I didn't order a rat rod!!!

So far VERY $HITTY service from GM

 

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Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted

The undercoating on my 15 is great, zero rust and the coating is durable...must have been an early build issue?

 

Most likely. I swear this is the last first edition vehicle I ever buy from any manufacturer. If it hasn't been out for at least a model year or 2, I'm walking away.

  • Like 3
Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted

My 10 month old truck GMC Sierra SLT 2014 frame is rusting fast.

 

Are those holes forming in the frame from the rust?

BuddyS Enthusiast

BuddyS

Posted
Posted

My 10 month old truck GMC Sierra SLT 2014 frame is rusting fast.

 

 

 

Are those holes forming in the frame from the rust?

 

Yeah, I would like to know if those are rust holes too. That's really concerning. What part of the frame is this, maybe a picture of it zoomed out.

nadrojcote Senior Enthusiast

nadrojcote

Posted
Posted

I'm guessing over time we will have a recall on our hands similar to toyotas. Most likely there was a flaw in the dipping process and the frame company will have to pay for new frames for our trucks. My 2005 tacoma didnt look as bad as my 1 year old sierra, but it did have a rust hole through the frame near the catalytic converter. Dana Corp. went out of business because of the loss from replacing all the second gen tacoma frames I was told. On the plus side my 10 year old truck got a brand new frame, lower control arms, ball joints, brake lines and hardware out of the deal. It looked like a new truck before I sold it.

steelcity Enthusiast

steelcity

Posted
Posted (edited)

I have a 2003 Jeep Wrangler that I bought new. It has sat outside every day of it's life. It has 135,000 miles on it. The frame doesn't have a speck of rust on it! And that's after driving it through 13 shitty Pittsburgh winters! The 2013 Avalanche that I just traded with only 15,000 miles on it looked like it was 50 years old. Not just rust on the frame, but all the cables and fasteners and nuts and bolts. I liked that truck and lost a lot of money trading it in but looking under it made me sick. The wax coating on my 2015 Sierra seems different/better. Time will tell.

Edited by steelcity
Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted

I'm guessing over time we will have a recall on our hands similar to toyotas. Most likely there was a flaw in the dipping process and the frame company will have to pay for new frames for our trucks. My 2005 tacoma didnt look as bad as my 1 year old sierra, but it did have a rust hole through the frame near the catalytic converter. Dana Corp. went out of business because of the loss from replacing all the second gen tacoma frames I was told. On the plus side my 10 year old truck got a brand new frame, lower control arms, ball joints, brake lines and hardware out of the deal. It looked like a new truck before I sold it.

 

Unless these trucks start snapping in half like the Toyotas and GM's hand is forced by the government like they did to Toyota, I wouldn't expect much out of GM. They've demonstrated over and over again that they will do their best to get out of issuing a recall for things unless people start dying from it or it's a cheap easy fix like a software update. They've most likely addressed it on later builds as people have pointed out here with their 2015 wax coatings and us early adopters of the 2014's will be left out to dry.

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