I'm having a heck of a time getting my Jimmy to pass the new NY emissions test. Code shows lean bank 1 and 2. So far I've replaced both o2 sensors, Maf sensor. check engine light still lights under 100 miles of resetting codes.

Any suggestions as to where to look next ?

Thanks

Post the exact codes along with any service history you have, and we can try to troubleshoot it for you.

Codes were P0171, P0174
I'm thinking there must be a vaccume leak somewhere but I sure cant find one.

Well unmetered air is getting into the system from some place, no mods done? How does the engine run? Check for low fuel pressure?

No mods were done by myself, And none show in the service records from the first owner.
The engine rus fine just a little shake at idle.
There was a time last winter when it would kinda bog down when taking off from stop, but that has stopped.

You should have a full scan done to look at all the parameters and continue to look for vacuum leaks particularly around the intake.