2016 2500 Denali with Rust, less than a month off assembly line

[wctieman]

I'm having a hard time accepting that my new truck which was built the week of the 23rd of November 2015 should have this much rust. The dealer and GMC tells me its normal and not to worry. Yeah, I was told not to worry when the 2015 I purchased 10 months ago had a leak and I started having mold grow in the body modling and flooded the passenger side of the truck. The truck was rusting from the inside out, I trusted them to make it right and they was told I had to pay 10k and lost the other 4 for the sound system I put in it to get into the 2016 which I was told I would get next to nothing. the 2015 had less than 6,000 miles on it.

 

The 2016 drives great and I really love it, yet its got a lot of rust.

 

http://postimg.org/gallery/2tm3kst72/cd016d69/

 

 

[George C]

Seriously?

[wctieman]

unfortunately yes, this picture http://tinyurl.com/zx4xzk9 shows 11/20/2015 I'm not sure where to go from here.

 

 

The truck rides better the 2015, the new processor in the head unit makes a world of difference. My phone connects right away now, voice commands respond instantly where as before it would take 3-5 seconds. The seats are slight wider, making for a more comfortable drive.

 

The new assisted steering makes a difference as well, I'm able to turn in a slightly tighter radius than in the 2015. Lower speeds the steering is loser, higher speeds its nice and tight. For me an improvement .

 

I feel like i'm getting screwed again

[Sierra Boy]

Most of the rust in pictures is surface rust due to lack of undercoating or the WAX crap they put on the frame and components. I had same thing on 2015i in just a few weeks of taking delivery. Rust on shocks they will not touch but the rest should be taken care of! Take it back again and tell them to fix it right!

 

Go to your salesman and get in his or her ear about it...that is not right for it to start already. What will it be like after a harsh winter??? GM...PFFFFFFFFFFT!

 

Sierra Boy

[SMiller]

What, the places with surface rust are bare metal, they show rust the minute the truck leaves the line, this is perfectly normal!

 

You can grab a couple cans of flat black paint and paint the areas or use GM's black undercoating wax.

[KMGZ400]

i use a spray on rubber undercoating made by permatex that I get at Napa and it matches the factory wax almost perfectly

[wctieman]

If you guys are under the option that it is normal then I will proceed as such. The 2015i didn't have these issues, I just find it strange.

[George C]

When parts are crumbling in your hand, then you have an issue.

Those pieces won't ever rust out, and that surface rust is totally normal for all vehicles.

[Z45]

It is normal. The surface rust will not affect anything more than being an eye sore. Every truck made will look like that at some point, most don't pay attention to it.

 

Note. While your truck was assembled in Nov, those parts with surface rust were built long before that.

[newdude]

Normal. The stuff below, there are pictures that match the ones you have taken (unfortunately I can't copy them). And guess what, every OEM has the problem. Go check a Ford or Dodge dealer, they have it. Mustangs are known for having axles that looked 10 years old right off the assembly line. Super Duty, F150, Ram trucks, I've seen some Tundras too.

 

#PI0281D: Underbody Component Corrosion

 

The following information may be helpful when addressing underbody component corrosion with customers.

Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion.

This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron.

This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.

 

Note: Extended outside storage may increase the opportunity for brake rotor rust. Vehicle braking systems tend to be self-cleaning while vehicles are in use, preventing any build-up of corrosion on the brake rotor surfaces. At times more extensive corrosion can cause pulsation due to thickness variation. This usually happens when the vehicle is parked for long periods of time in humid type conditions and the braking surface area under the pads corrode at a different rate compared to the rest of the braking surface area. Cleaning up of braking surfaces (burnishing) can be accomplished by 10-15 moderate stops from 56-64♦km/h (35-40♦mph) with cooling time between stops. If multiple, moderate braking stops do not correct this condition, refer to the latest version of Corporate Bulletin Number 00-05-22-002 - Disc Brake Warranty Service and Procedures for additional information.

Corrosion Protection

General Motors uses a large variety of materials in the manufacture of vehicles. Many of these components undergo an extensive corrosion protection process. These components include major body structures, powertrain, wiring and electrical components and various other areas of the vehicle. General Motors engineering determines the effects of corrosion on every vehicle component.

Acceptable Corrosion

General Motors has determined that the performance of some components is not affected by surface corrosion and no longer takes preventative steps on these parts.

 

Rust

This corrosion may be red or brown in appearance if the component is made of steel, forged iron or cast iron.

These are typical underbody or mechanical components such as but not limited to propshafts, propshaft yokes, U-joint, steering knuckles, brake rotors and calipers, axle housings, springs, shock absorbers, suspension control arms, tie rod ends and exhaust system components. As the rust ages, it turns from an orange-red like appearance to a darker brown like appearance.

 

Aluminum Oxidation

Cast aluminum alloy components may appear to have a grey or white coating on the surface commonly known as “surface oxidation.” Uncoated aluminum alloys begin to oxidize as soon as it is exposed to the atmosphere. This coating does not affect the serviceability or performance of the component.

 

Many mechanical components are cast in aluminum alloys, these components may include, but are not limited to oil pans, valve covers, transmission and transfer case housings, steering gears and axle housings.

 

No repair or consideration should be given for this concern. Surface corrosion on unprotected components will vary with age and exposure. Corrosion on these components has no detrimental impacts, either in short or long term durability.

 

 

[Sierra Jon]

Still though, if it bothers you I'd get a can of black undercoating. I'm OCD like that too.

 

Sent from my Nexus 6 using Tapatalk

[KMK454]

My truck had some surface rust in the engine bay upon delivery, but after a few heat cycles it went away.

[shedkept]

Loctite "Extend". Brush on or spray. Use whatever paint or undercoating you like over it. I've been using it for years.

It's called "busy work".

[ThreeQuarterFun]

I see you are Florida. Salt air would definitely accelerate rust on those uncoated surfaces. I can't explain why this didn't happen on your previous truck, unless it wasn't in FL.

 

I'm in MN so we get salt spray from the roads in during winter. It does a real job on uncoated surfaces. Coated surfaces fare better, but some areas get abraded by road grit and eventually lose their coating and have to be re-sprayed.

 

I learned from jmy the last truck, and had my 2016 fully undercoated. There are still a few items under there that the shop missed so first warm day I'll be under there doing "busy work" with a cans of PlastiDip and Permatex.