sorry if i ask a lot of stupid quesitons, im pretty new to all this...

i went to autozone to get a scan bc my SES light was on and it the scan came back with 6 codes...

1. system too lean bank 1 po171
2. system too lean bank 2 po174
3. EVAP emission control system leak small po442
4. Idle control system RPM high po507
5. system too lean bank 1 po171-PD
6. system too lean bank 2 po174-PD

how bad is all this and what should be my next step to correcting the problem? i dont even really know what runnin too lean means

 

Probably a vaccum leak. Probably evap related or loose hoses, leaky manifold ect. If there is a leak past the maf it lets in unmetered air thus causing it to run lean, that also explains the high idle.

 

here is a link to another post i am on that explains the leak that i do have

https://ls1tech.com/forums/general-maintenance-repairs/527217-please-help-vacuum-leak.html

 

evap emissions??? That's your fuel system, so sually whne my wife's trailblazer throws this code, i go tighten her gascap and she's good to go