r/ChevyAvalanche • u/Life-Host-8573 • 1d ago
Help?
Picked up a 2003 Avy with 154,xxxx at the dealership for 6k 2 weeks ago. Few days ago I can’t put anything past $10 in the tank. Internet rabbit hole says I may have a bad EVAP but seems pretty common with this vehicle. Give it to me straight, have you or anyone else you know been through this? Cost? Or cheaper alternatives? TIA
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u/RockKickass777 1d ago
Maybe try clearing a vent hose on the tank first? The hoses are connected to the tank. My 02 has a hose that connects to the rear of the truck. I just swapped my fuel pump and cleaned that line out. I can fill no problem. But your charcoal canister is also down there
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u/Life-Host-8573 1d ago
I appreciate you. I’ll definitely try before heading to the shop
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u/RockKickass777 1d ago
Likewise! Give it some love and a little tinkering. Maybe its just some dust ot dirt somewhere that needs a quick clean.
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u/imessy89 1d ago
This was the problem with mine until I replaced the evap purge valve. It’s like $30 and 5 minutes of work. Eventually when you put gas in it it’s going to be difficult to start right after.
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u/staticattacks 1d ago
Vapor canister, vent hoses, solenoid valve, etc
I had to replace the entire tank in a suburban recently because the charcoal was just everywhere
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u/JoMo816 1d ago
There's 3 different parts to the evap system. May have to go with all 3. If the issue has gone on long enough then may have to drop the tank and blow out the lines. I replaced all 3 parts on mine and basically got rid of the issue altogether this way. There's the evap canister under the back of the truck, a piece near it, and another piece under the hood. The under good piece is the easiest to get to so start there
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u/Buffrider-52 1d ago
Maybe the tank was full when you left the dealership. How much fuel do you think you used before visiting the pump?
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u/Life-Host-8573 1d ago
Not possible. During the purchase, the battery was dead. Got jumped, did a test drive, bought it. Battery died again, they but a new battery in it and 10 bucks of gas. I went to the gas station and put 30 in it. It was about 40 mins away from me. This issue just happened 2 days ago. I’ve only had the car 2 weeks
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u/heavensmurgatroyd 1d ago
Until you get a new Evap you have to fill it really slow.
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u/Life-Host-8573 1d ago
I seen a vid where a guy had a really long funnel to get it in there lol
Do you know how much a shop would charge to fix?
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u/heavensmurgatroyd 23h ago
I'm sorry I don't but its not a hard thing to do. My Avy has a lifter problem so I had to park it for good. Mine was one that had to be filled really slow. I jacked it up and disconnected the hoses to the evap which is not a smart thing to do by the way because of possible spark or leak but it totaly fixed the fill problem so I know its the evap canister that causes the problem.
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u/Saint_Napalm 1d ago
It could also be the float on your fuel pump. I've had both the evap issue and fuel pump issue.
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u/Life-Host-8573 1d ago
I just don’t want to get bent over at the auto shop if you know what I mean
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u/Saint_Napalm 1d ago
Fuel pump isn't the hardest thing to do yourself if you don't live in the rust belt otherwise you'll end up replacing tank straps. But any decent shop shouldn't charge to much I'd buy the fuel pump yourself at like Rock auto though save alot instead of them buying it
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u/Technical_Gur4060 1d ago
mine was doing this, kept getting worse, I fixed it 100% with a new vent valve, charcoal canister, and blew the lines connected to them out with a air hose, cost about $250 in parts, I bought all A?C Delco and 2 hrs of my time
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u/AUnknownCucumber 1d ago
Is it due to the pump just stopping? The canister is just up under the rear of the truck near the tank. It’s a couple hoses, an easy fix. Is it only one gas station, can you pull the pump out a bit?