Why is this happening!!

2010LTZ4x4 · October 18, 2017

The paint on the driver side door is blistering in a small area. It started about 2 months ago with 1 blister and has gotten to the point you see in the pic that I took a couple of days ago. The truck has never been repainted I'm the original owner. Any idea what maybe going on? There's no rust on the inner door panel either.

montyss · October 18, 2017

its looking a lot like holes on the way there

intheburbs · October 18, 2017

Sorry to say it, but that's rust.

I'm getting some bubbling on the painted bumper of my '09 Denali. Only way I'm going to be able to stop it is to replace the bumper.

2017_LTZ · October 18, 2017

Looks like that might be rust...

2010LTZ4x4 · October 18, 2017

Rust! That sucks! How does rust start in the middle of the door where there is no paint damage. I guess the steel in the door must be rusting below the paint? That's some good quality steel there.

intheburbs · October 18, 2017

Just a supposition - bad weatherstripping around the window allows rain water to get inside the door, maybe the drain holes are plugged, water stands inside the door causing rust.

kevin79 · October 20, 2017

I have the same but on my rear wheel wells. How do I stop them from growing/spreading?

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Grumpy Bear · October 20, 2017

11 hours ago, kevin79 said:

I have the same but on my rear wheel wells. How do I stop them from growing/spreading?

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Before it starts. There are uncountable places for water/salt to enter from the inside if your not diligent about keeping things clean, sealed and surfaces coated. From the outside rock chips left unrepaired and paint left unprotected. Manufactures have made an art out of compromising the integrity of the raw metal.

demech23 · October 21, 2017

Last spring I noticed some bubbles under the paint on the rear driver door on my 2010 Silverado, tiny rust holes from the inside working their way out. Metal was so weak that a prick easily pushed though.

Colossus · October 22, 2017

HOLY CRAP was that covered under the rust/body warranty?

2010LTZ4x4 · October 22, 2017

19 hours ago, demech23 said:

Last spring I noticed some bubbles under the paint on the rear driver door on my 2010 Silverado, tiny rust holes from the inside working their way out. Metal was so weak that a prick easily pushed though.

Holy Crap is right. Same year and color of my truck. I hope mine doesn't get that bad. But who knows, I have noticed some more bubbles show up since I posted the first pic. I think I'll take the door panel off and see what's going on from the inside. Been to the dealer and no help.