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I don't believe its a spark issue because I've already tested for fuel pressure and there is none. You also can't hear the fuel pump turning on what so ever. But yeah, I'll need to check to see if my wiring is alright. From what I see the fuel gage looks to be working. Its still at 3/4...

Have a 2000 Chevy Tahoe Z71 with old body style. Has a 5.7 engine with 4 wheel drive. Just changed out my fuel pump three weeks ago, along with new relay, and fuel filter. Also made sure to clean out the gas tank too. The fuel pump wiring harness was replaced four years ago at dealership...