1500lbsoffrenchfries

It's possible the O2s are both going up, but what caused that? What I do know is, I drove the truck about 20 or 30k miles after I bought it without codes. I installed the intake maybe a 1k or so ago at most, and it kicked out a rich code at which point I saw trims in the negatives. I think the Spectre intake might be the problem, but I have no reference and my old intake is broken, so can't slap it back on. I'm taking it to a Tuner to see what he finds. The filter isn't oiled I believe

I just changed plugs, and the motor was definitely running rich. 02s on both banks going bad too at that seems odd. I'm wondering if the intake offset the MAF

My 2009 5.3 GMT900 flex fuel LMG motor is running rich. Short term fuel trims are on average -12 or lower (don't have an average field on my scanner, but it's at best a -7, at worst a -17, and most often it's a double digit figure). I've tried a new MAP, new MAF, new plugs, new fuel rail sensor, and tested the fuel pump pressure. The pump kicks out about 60 psi on a cold start and holds steady at 43 psi. I have tried resetting data by unplugging the power to the ECM - which works considering long term trims reset. Someone mentioned resetting the TPS. Not sure how with an OBDLink scanner. Other than that, my idle holds at -5 short term trim until long term trims becomes -5, then itll hold closer to 0 short term idle trim. Anything other than an idle has a double digit long term trim in the negatives and anywhere from -7 to -17 short term trim. Alcohol content is at 6.9% which seems right. It runs decent when you reset the trims, then it loses a bunch of power after maybe a quarter mile and goes back to running like a dog at anything besides WOT. Please help I'm running out of options. It recently cut P0172 and P0175 codes on both banks. I installed a short ram Specter intake about a month or 2 ago, but the engine has been running poorly before that. It didn't throw codes before however. All vacuum tubes are secure and I did a brakekleen vacuum spray test and there aren't any leaks I could find.