Popping sound (like paint thinner can) from back of truck. Gas tank expanding?
20

Asked by RoofDude Jun 26, 2015 at 07:20 PM about the 2003 Chevrolet Silverado 1500 Extended Cab LB RWD

Question type: Maintenance & Repair

after running truck a while, when stopped at light or after parking at home, i hear a sound like a metal can expanding(like a paint thinner can in heat) from back passenger side..What is that? fuel vapor canister thingy?

7 Answers
102,585

Reelin68 answered 8 years ago

Your tank is either not venting for some reason or the fuel pump is collapsing the tank due to no vent. Take your gas cap off. Did it just suck in a ton of air? I'm just guessing here.......

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RoofDude answered 8 years ago

just took off gas cap..no noises or anything..been parked for couple hours..truck runs beautifully..just had oil change, fairly new fuel filter, etc..tune up basically. started before all that though.

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102,585

Reelin68 answered 8 years ago

Well that's good. Maybe it's just the gas sloshing around in the tank. Have you got under the truck an pushed on the tank at all to see if it pops if you push on it? That should be the thinnest metal on the whole truck.

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RoofDude answered 8 years ago

will try that for sure..dude at work thought it might be fuel evaporator system, not releasing vapors properly..still a possibility, but he had me worried talking about gas tank exploding..maybe the fuel canister vent valve? will end up taking it in..was trying to see if could fix it myself.

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Cutlus21 answered 4 years ago

Same thing 2006 Silverado guys at my work have wondered for years

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30

Guru9NM417 answered 2 years ago

evap vent is not venting basiclly sucking your fuel tank together

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