2007 running rich on bank 2

[j91z28d1]

You may be correct except for one thing. I don't have variable cam timing but I do have an oil pressure issue that has been present since I did the DoD delete. I'll get the p0521 code sometimes. The oil gauge goes to 0 and gives me the warning and when I give it a bit of gas it goes back up and stays that way. That too only comes about when the weather is less hot. That only happens every now and then. The service stabilitrak light and CEL for p)175 happens daily. I was told that I have the oil pressure issue because I didn't change the oil pump to a low volume high pressure one.

Why would an oil pressure issue cause a rich condition in one bank?

I have a file of the truck running at idle and the stabilitrak light comes on at some point and I give it some throttle and it goes away. Problem is, it won't let me attach the file here.

**EDIT** Side note, I have a flex fuel and was told to look at my alcohol percentage and couldn't find it, but I did discover that the flex fuel was disabled. I did not to it.

hp tuners will tell you fuel trims in the scanner, just gotta set it up as well as E percent.
I don't know forsure that it will reset it thou.

hpt scanner is pretty good, lots of setup thou. I find the tech 2 has more of useful diagnostic info.

 

[03GMCYukonXL]

Well today I got a tighten fuel cap warning and a code for it. The fuel cap didn't seem loose at all but taking it off and putting it back on seemed to help it. I got an evap leak code. I have no clue where to begin hunting that leak down. It may be the root cause of all of this but that code has only shown up once or twice