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  1. E

    89 C1500 LQ9 4L80 Speedomoter

    Last night I tried reversing the purple and yellow without success then plugging directly to the vss also without success. The vss serves all the output info to the PCM for speed, shifting, tcc lockup, etc.
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    89 C1500 LQ9 4L80 Speedomoter

    Thankyou for the response. So I'm assuming my cluster needs work because I tested power from the vss purple and yellow wires to the pins behind the cluster and they are good. Maybe reversed or the fact I spliced into the vss for the LQ9 harness I messing things up?
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    46mm Bored TBI Fuel Regular etc

    These are factory flow rate injectors. Not sure what they flow at 13psi. 18 psi was what I was told to set the psi at from the guy that burned my chip.
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    46mm Bored TBI Fuel Regular etc

    It has AC Delco injectors. It ran good for being Tbi but switched to Sniper EFI for its tune abilities.
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    89 C1500 LQ9 4L80 Speedomoter

    It goes freaking awesome lol even with 308 gears. Worth every penny so far. Plans for next winter are 373 gears, locker, cam, single turbo, and holley terminator x max. This year finish bodywork and work out bugs.
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    46mm Bored TBI Fuel Regular etc

    Have a tbi setup off my 95 k1500 with a 383 with less then 1000 miles on everything. Bored tbi, new injectors, adjustable fuel pressure regulator set to 18 psi, adapter plate to intake, sensors etc. $150 for everything you pay shipping. Located in canton CT.
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    89 C1500 LQ9 4L80 Speedomoter

    Hey all, I'm finishing up a engine swap on my 1989 C1500. Was originally a 4.3 auto, now 6.0 4l80. Everything works but I can't seem to get the speedometer to work and it did function before the swap. Tried splicing the original vss Purple and yellow wires to the vss output of the trans with...
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    99 Denali Overdrive Surge

    Anyone?
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    99 Denali Overdrive Surge

    Bought it not running due to fuel pump. 100 percent factory, no check engine light. PO said it has a jasper transmission in it and verified with receipt. Has 30k on the transmission.
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    99 Denali Overdrive Surge

    I have a 99 gmc yukon 5.7l. Starts runs and seems to drive great until it goes in overdrive. Once I get TC lockup I get a 200 rpm surge as if it were to come out of lockup and then rite back in. I can't really feel it but can hear it with the increased engine speed. Does this whenever...
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    99 Denali rear door latch

    Well that was the trick! After removing both door cards and inspecting everything I got it open with a pretty hard nudge with my shoulder lol. Popped rite open! The amount of road debris and crap in there tells me it hasn't been open in years! Thanks guys
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    99 Denali rear door latch

    Recently bought a 99 yukon without the drivers rear door operating. Finally got a chance to look into it and removed the door panel from the door and tried operating the linkage by hand and I cannot get the dang door to open! Tried locking and unlocking the door and i can see the lock...
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    Denali Fuel Pressure Low

    No leds here. 100 percent factory.
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    Denali Fuel Pressure Low

    Nope factory taillights.
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    Denali Fuel Pressure Low

    So did some more troubleshooting. Cannot figure it out although I did come to find additional issues. My blinker blinks fast as though I have a burnt out bulb even though I do not. No running lights in the rear. And the fuel pump issue. I checked my grounds and no success. I pulled the...
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    Denali Fuel Pressure Low

    I'm not sure what the new style is, it looked like the one I replaced lol. Was 65 70psi when hooked to a battery.
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    Denali Fuel Pressure Low

    Yes fuel gauge works. Ill check the ground tomorrow.
  18. E

    Denali Fuel Pressure Low

    So as alot of you have seen i bought a 99 Denali with a bunch of electrical questions. I have not run it since I bought it and today was the first. Had low fuel pressure from the start 10 psi max. Replaced the fuel pump, same. Fuel filter replaced, same, relay same... said the hell with it...
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    99 Denali Alarm

    Reconnected the battery and yes it saved the setting, no alarm! Thanks again
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    99 Denali Alarm

    Awesome thanks for all the information, it worked perfectly. Curious though, after disconnecting the battery do it go back to factory settings?
  21. E

    99 Denali Alarm

    Just programmed the new key fob and it works but still have the same issue with the alarm.
  22. E

    99 Denali Alarm

    have a 99 Denali that has alarm issues. Alarm goes off every time you open the door with ot unlocked. Cycle the key and it stops.. PO pulled the horn fuse, now I know why!
  23. E

    99 Denali data port

    Just ordered that one. Thanks for the help! Not a total waste, I just programmed it to my 02.
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