How to spot stainless vs mild steel

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Jun 15, 2003
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This is from my 2008 silverado. They were nice enough to make the pressurized fuel line out of stainless about halfway to the engine. Then it switched over to rust. :cautious:

EVAP was chintzy normal steel from stem to stern despite their being RIGHT. THERE. with the good stuff. I do have a EVAP code which might get resolved with new material.

Needless to say, this is getting replaced. I got a kit of braided lines on ebay but it didn't account for the fuel pressure sensor. Avoid. Going to have to cobble stuff together with those nylon-to-steel compression fittings, those boil-nylon-line barb fittings, and god knows what else.


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