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2017 Chevy Colorado Z71 Extended Cab 4WD Summit White
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1,247 Posts
Well that is not good at all. Some how water is getting back there. Hope not happening to mine.
 

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Premium Member
2017 Chevy Colorado Z71 Extended Cab 4WD Summit White
Joined
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1,247 Posts
That's not salt build up, that's aluminum oxide from the bracket.
- Pitting corrosion can occur if the aluminium is in a very damp environment where there are often salts present.


- For example, it occurs in common dirt and debris as well as in environments where the water cannot be led away from the metal.

Corrosion: Reasons and solution |
 

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150 Posts
Great! Something else I have to check out now.
 
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