Recent content by Jsmarr123

  1. J

    Superchips settings

    Anyone have good transmission settings for flashpaq f5 on a 03 Yukon xl 1500? I want quick shifts but want them to not be too harsh, the superchips value on the line pressure makes it shift fairly harsh
  2. J

    Normal oil pressure for 03 l59

    So I’ve had a few 5.3s of the same era, was just curious what is normal hot idle oil pressure I have a 03 Yukon with the l59 and getting 30-32 psi oil pressure at hot idle, 174k miles
  3. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    Ok thank you, I’ll check into that, going to cut a hole in the floor I’m out of town working and don’t think the hotel would appreciate me dropping a tank in the parking lot also it would be quite challenging by myself
  4. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    Update, it shut off again today I smacked the fuel tank hard and since has run fine since. Ordered new fuel pump
  5. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    Thanks for the advice that was on the list tomorrow after work, once it shuts off it’s kind of hard to get started back
  6. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    The guy I bought it from didn’t know either, had it 6 months he said, believe it to be an old company vehicle but not sure, it definitely doesn’t run like it’s pushing 300k
  7. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    Cut the whole aftermarket harness at once with battery connected, took out the gmos-04 interface and the swc interface but I couldn’t tell anything else it may have gotten too, everything bcm related appears to function perfectly fine, thinking I just got bad luck, purchased for 1600 with “173k...
  8. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    Thank you I’ll check fuel pressure and voltages tomorrow before replacing because it’s 350$ at the store, I’m out of town working and have no time to wait on stuff, thank you. Is it possible I messed something up when cutting the radio harness? Because everything worked fine before, maybe it’ll...
  9. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    It said primary dtc was p0178, had secondary dtc for p0102 so I replaced the maf sensor it was a Chinese knockoff with no brand, may try replacing the flex fuel sensor tomorrow after verifying voltage on the harness
  10. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    I replaced Tac module and that codes gone, had another for mass air flow so replaced that, and still have the p0178 for flex fuel sensor. Will update as I gamble money away lol
  11. J

    03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

    Have code p1518 and p0178, just replaced tac module. I was changing the radio and it already had an aftermarket interface harness to retain Bose and instant, I got ahold of myself and cut the aftermarket harness while it was plugged into the factory harness, I don’t know if it’s related or not...
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