evac problem

[capbuster]

Hi everyone, I'm the new guy on the block.

I've got a 2002 Silverado extended cab, showing an SES about an evac code.

I've looked on this site, but don't know my way around yet, so I'll just ask you all. What do I do to fix this problem? It's been on for months, and it's getting annoying. Any help would be greatly appreciated. Thanks a head of time.

Mark

[evnpar1020]

new here but wiling to bet its po446 code which is what i keep getting on my 03. do a quick search and you will find the solution. good luck.