Code po 442
 

Service engine light remains on. Code 442 came up. Any help or suggestions. 98 gmc sierra 5.7

This site might help you out. Has a list of codes.

P0442 Evaporative Emission Control System Leak Detected (small leak)

Link

Mine has had that code for about 3 years now. I took it to the dealer and they had me come pick it up saying 'they didn't have the parts to fix it' but never ordered anything for it and didn't try and set up another appointment but never charged me anything, it's been running like that since. That dealer now is out of buisness...

I would love to find out how to correct it so I can clear the code and get the light off but I have no idea what to fix on it but it runs great.

could be several things. quickest and cheapest option would be to try a gas cap. beyond that you really need a smoke tester (unless someone else here can tell you a way to test your evap system otherwise)