P0446 On 08 Silverado

[dlewis1111]

So, I started a topic before about this one when I had the third P0446 code. The first dealer replaced the gas cap and it came back about three months later. Then they replaced the solenoid valve for the 2nd and 3rd. This time, a different dealership replaced the gas cap and fuel tank. Apparently, the gas tank filler neck had a metal bur on it that was snagging the gasket on the gas cap and causing a leak that got worse each time fuel was put in.

 

All I can say is wow, great find and excellent customer service from my local dealership. I have my fingers crossed that this (the only problem that I have ever had) fixes the problem.

[txab]

Hope that fixes you up. Good to know you found someone who was willing to look past the obvious and find the real culprit