2020 Rust problems (How to fix and what can be replaced)

[DaisyGirl]

Hello All GM owners,
My 2020 Tahoe which I bought brand new, and it only has 37,700 miles on it.
Does anyone know or have had luck with getting this fixed and then preventive measures applied to stop it from happening again.
I have an extended warranty looking to see if that covers anything. I also read a bulletin about faulty wax coating and prep for my year Tahoe.

https://gmauthority.com/blog/2024/03/gm-to-fix-chevy-trucks-frame-wax-coat-peeling/

I feel completely lost and let down by GM. I don't even have it paid off yet.

Any words wisdom, help, or thoughts?

Thank you-DaisyGirl

 

[Big Mama]

Is GM declining the 6 year corrosion warranty because it’s not rusted through? I think the guys up north can answer better than I can but you can certainly replace any bolts with new. @Joseph Garcia lives up north. He may have some ideas.

 

[Joseph Garcia]

I wish that I had something concrete recommendations to stop that corrosion, but unfortunately, I don't.

I wash my truck often, particularly in the winter, and I always keep it in my portable garage, when not in use. I also keep a paint repair kit for use on scratches or chips in the paint surfaces.

 

[GMCChevy]

Where are you located? If a winter rust area find a place that does oil spray rust proofing, not the hard no drip stuff. That'll pretty much stop it. Doubtful GM will do anything to fix it. You could sand it off yourself and put black rustoleum over it.

 

[justchecking]

I had good luck stopping rust that already started with krown oil treatments. See www.krown.com for locations. Don’t go to to a company called zeibart. Also talk to your dealer and see what they say. Good luck.

 

[RoadTrip]

Unfortunately due to my years of living in upper midwest winters, I’ve become somewhat of a rust killing expert.

The problem areas the OP is showing are certainly manageable. For every one you see, there are many you haven’t discovered yet. Put your vehicle up on a lift and bring a box of kleenex for yourself.

The best process for tight areas like this is to sandblast the rust (small diy kits available at Hardly Freight) and then treat it with POR-15 to suck the moisture out of any residual rust — which there always is.

You then over-coat the POR-15 with a high quality enamel to seal off any future air flow, and then coat it with a high quality undercoating spray.

Repeat on all of the other areas where the rust is occuring.

 

[vcode]

GM won't do anything. It is frame rust and there are no rust holes. Pretty much a fact of life in any state using salt on the roads. I've seen some Expeditions of the same year that look far worse. I have wire brushed rusty areas of my frame and used an undercoating similar to what GM applies and it has held up pretty well.

 

[Big Mama]

How about rust converter?

 

[mmeridith]

Ospho, pour into a spray bottle and coat the rusty areas. Ospho

 

[B-train]

As a midwest guy who has fought rust for YEARS, follow @RoadTrip advice. Then follow it up with a good coating of fluid film or wool wax. Check FB MARKETPLACE if you can't do it yourself for people who advertise it - well worth the money. I've done this for over 15 years now and have never had a rust problem on any of my vehicles - most of which are well north of 200k when sold.

Touch up yearly as needed on the frame rails with a wire brush, rust converter and paint. Then coat again with fluid film or wool wax. This won't ever wash off in areas of no water spray (doors, rockers, underside of floor panels, etc), but frame rails are blasted year-round from road spray and washing, so eventually it wears off. Like stated, I do mine yearly, sometimes every other year if I'm too busy and they look as good as new.

Lastly, GM will laugh you out of the door and tell you that's normal wear and tear......call us if there's a hole. Which will never happen in the 6 year period.

I've only ever seen 1 vehicle get new doors for rust.....it was 1993 S-10 blazer, which were notorious for rust, and it took the dealership actually working for the customer to make it happen. NOT likely a solution for most people.......ever