running lean bank 1 & 2

[emeryf86]

2000 5.3 silverado z71 Running lean bank 1 & 2 what do i need to do?

 

[Red Clay]

What is the code you got? And is it the only one?

[txab]

Check fuel pressure and intake gaskets

[dgrinnell]

Just had these two codes on my wife Envoy Denali with the 5.3l, I fixed it by cleaning the MAF sensor and TB also cleaned the intake/filter and made sure all the connections were tight. The TB is easy to take off and only takes a few mins to clean up and put back on.