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Showing results for tags 'Filler neck'.
I have a 2020 gmc sierra sle 5.3, I bought it may 13th. Starting at about 800 miles check engine light would flash for a minute or two and then go off, this occured every 300 miles until I got in one day around 1500 or 1600. Check engine light stayed on. Called the dealership and took it in was throwing misfire codes, the diagnosed it as fuel pump module reset the codes and ordered the part and sent me on my way. Come back in and had it replaced when the part arrived, well now fast forward to a tank and a half later and now the check engine light is on for the evap system/gas cap, and fuel pressure at 2200 miles. Right at a week from the time it come out of the shop. I've been extremely happy with the truck but I can't believe I'm going to have to find time to get it in the shop to be looked at and fixed again. I'm at wits end already. Anyone else having these issues?
My new to me 2017 2500HD Denali Duramax would not accept fuel. I had to fill it ever so slowly to prevent backlash and spewing fuel all over the place. It was obvious to me that the vent was not venting. I shot compressed air into the vent line and determined that it was not clogged with a dirt dauber or anything like that. I traced the line to the top of the fuel tank....it does not appear to be kinked TOO badly at the top of the tank (but a 90 degree fitting sure would have been a nice touch GM). Best I can tell, when the truck is full of fuel, fuel can slosh up into the filler neck and back flow down in the vent hose which happens to be about 4" longer than it really needs to be. This allows fuel to get trapped in the sag and prevents air from entering the fuel tank. I shortened the vent hose 3.5", re connected it at the filller neck and zip tied it to the filler hose so that it will not be able to sag. Problem solved, It can take fuel at full pressure now. Hope this helps the next person that has this problem.
Hey Folks! New to the forum, I just put a wood flatbed on my 00 silverado, tried to use the factory plastic filler neck holder, and it puts the filer too low, right now I just have the filler mounted flat to the deck, and would like to change that. also my filler is pretty thrashed, so going to get a new one, whats everyone doing for fillers on flatbeds? are there any other GM fillers that work better with a flatbed? and some pictures would be great. Thanks!