My truck smells like fuel. Did you replace the evap sensor on the engine or the one near the fuel tank.
p0455 not evap solenoid
Started out with a "small evap leak" code. Replaced gas cap with two different new ones but code kept coming back. Suddenly, I started getting p0455 "large evap leak." I replaced the evap solenoid and reset the code. It came back on after about 40 miles. I left the light on for a few days and it then shut itself off. However, 90 miles after it shut off, it's back on. I had it smoke tested the other day but no leaks could be found. I can smell gas fumes, at times, near the filler tube and between cab and bed. Any ideas?
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There may be a leak in the Evap line that goes to the top of the tank. Item #8 in this link. FUEL TANK MOUNTING & FILLER PIPE | Nalley Buick GMC Brunswick
I had this problem and in my case the body shop never properly installed the filler neck to the bed and the top of the neck would sometimes move below the top edge of the body creating a gap in the seal and causing the leak. I would get the filler cap notification on the DIC then at the next engine start, code P0455 would set.
I replaced the one by the fuel tank. Had another cycle when the light came on and went off on it's own two days later. Currently no light. Taking it back Monday and they are going to smoke it again.
There may be a leak in the Evap line that goes to the top of the tank. Item #8 in this link. FUEL TANK MOUNTING & FILLER PIPE | Nalley Buick GMC Brunswick
If it turns out to be that line, can it be replaced without dropping the tank?
I don't think there is access with a Crew Cab.
I found the leak. Got new tires to put on so while I had the old ones off, I removed the wheel well liner. The fuel line coming out of the fuel pump is wet right at the pump. Looks like the tank will have to be dropped. I was really trying to avoid doing that.
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