Guess I goofed and posted this in the wrong forum so I will try it here.
I have had a P0440 code popping up every so often for the last 6 months. I know it is a emissions issue but after doing many "searches" I think I'm more confused than when I started on what it could be. (lol) It's a 2002 Tahoe with the 5.3 engine and seems to run fine. The only clue that has happened a couple of times, (but not always) is when you remove the gas cap,which I have replaced, pressure is relieved from the tank as if it was not venting. Has anyone had this problem that could help me with a fix, so I don't have to change a lot of parts until I find the right one. Thanks
I have had a P0440 code popping up every so often for the last 6 months. I know it is a emissions issue but after doing many "searches" I think I'm more confused than when I started on what it could be. (lol) It's a 2002 Tahoe with the 5.3 engine and seems to run fine. The only clue that has happened a couple of times, (but not always) is when you remove the gas cap,which I have replaced, pressure is relieved from the tank as if it was not venting. Has anyone had this problem that could help me with a fix, so I don't have to change a lot of parts until I find the right one. Thanks
