AJ Fitz

The fiel pressure goes from 40-42 idling and to 44-46 when driving

I have a 2009 Chevy Silverado 1500 6.2 flex fuel I've been running codes off and on for about 6 months to a year it's ridiculous I've done all kinds of things to try to fix my truck it all started with a bad rusted fuse for the fuel pump control module which took a while to figure that out cuz the fuse tested fine that was causing my truck not to start sometimes and then I've been getting Bank to running lean for a while and I got a ridiculous quote for the fuel injectors of 2400 I replaced them myself and saved a lot of money and that got the codes off and the truck started running good for about 3 days and then now it's running bad again and it's like breathing hard when it shift gears and it's losing a lot of horsepower when I accelerate and it's a code came up p 0 1 1 7 5 gm DTC definitions not found I replaced all kinds of stuff on this car the purge valve the canister the canister solenoid the filter every part of the EVAP system I've replaced I replaced all the fuel injectors I got a new starter which went bad there's a screw this seems like there's a lot of screws missing on the manifold like there's four spots where it looks like there could be a bolt but there's nothing there I don't know if those holes are supposed to be there or not I may sound down but I'll have to take some pictures and add it to this post soon but it's a nightmare lately with this truck it's always something I don't know what to do I'm thinking maybe the next thing I got to do is replace the fuel filter and the fuel pump I don't know what to do anybody can help me I'd really appreciate it possible maybe the fuel pump control module needs to be replaced I don't know where I was seeing O2 sensor someone please help me