GMC Sierra 6.0l 1500 gasser need help

Butterbean

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I have a 08 GMC Sierra 6.0l 1500 gasser that I can’t get running right I’ve had it for almost two years I’ve changed (all within the last month and a half) coil packs, plugs, wires, MAF, computer, I hollowed the cats and now I’m fixing to change the fuel pump I tested the fuel pump the gauge bounces at 60 psi but I figured I’d change it anyways I can start my truck and it will idle fine my issue is when I go to actually drive I have no power it spits and sputters and any incline is a no go I’m out of ideas I’m not familiar with anything past 97 tbh so I’m in need of some more help on how to get it running correctly again also I have purchased an afm delete thing that plugs in my obd2 port it helped for awhile (6 months) but now everything I do seems to make it worse honestly I’m at a loss thank you in advance hopefully I can get some answers
 


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