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  1. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Fully agree. Ill get it changed as soon as i can. Its Cold here!! Lol Sent from my SM-G975U using Tapatalk
  2. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Just following up with you guys. I bought a GM original stat for a much lower price online. Going to replace it but i wanna share what a local shop said while i had them test my ABS system. (Separate issue). They think my heater core is restricted. They said i have large temperature drops...
  3. U

    ABS issue..Someone prior to me did this, I KNEW it

    Alright guys... Had the codes pulled C0281 and C0265 First code being open or short in stop lamp switch/circuit 2nd code being relay output issue in ABS module Sent from my SM-G975U using Tapatalk
  4. U

    ABS issue..Someone prior to me did this, I KNEW it

    Yes i have. When it works it works well. When it doesn't work...you can definitely tell! Ha. Sent from my SM-G975U using Tapatalk
  5. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Did some digging on the radiator. I think Im going to dismiss that at this time. Its a 34" core and there's nothing too different between them to make a difference in my opinion. Going to go after the stat and i will probably backflush the heater core anyhow. Sent from my SM-G975U using Tapatalk
  6. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Yes i agree. Its on my to do list Sent from my SM-G975U using Tapatalk
  7. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Haha clear as mud yes. I do have rear heat and rear AC. Did some more testing. Got home, let the cooling system cool down slightly. Opened the hood, plugged in scan tool to check temp. ECT reads 165F when i started the truck. Turned the rear heat off and front full hot and highest blower...
  8. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    I just was looking under the hood and found a part number on my radiator 52487604 When i look that up online it is a genuine GM radiator. Whether its factory or Not i can not tell Sent from my SM-G975U using Tapatalk
  9. U

    ABS issue..Someone prior to me did this, I KNEW it

    Ok well...there are 2 issues here tho. The ABS light on the left of the dash never comes on either. So idk if the bulb is taken out or what. So i have no easy way of telling which faults are on unless i get everything scanned Sent from my SM-G975U using Tapatalk
  10. U

    ABS issue..Someone prior to me did this, I KNEW it

    Thanks. Gonna get that done and post what i find Sent from my SM-G975U using Tapatalk
  11. U

    ABS issue..Someone prior to me did this, I KNEW it

    I love my truck. There are very few issues with it. Previous owner took extremely good care of it. However... I had a hunch when buying it that something electrically was being covered up. Sometimes...ABS works, then randomly itll just decide not to work. Odd thing was there's never any light...
  12. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Dealer wants $193 for the thermostat [emoji23][emoji23][emoji23][emoji23][emoji23][emoji23][emoji23][emoji23][emoji23][emoji23] Sent from my SM-G975U using Tapatalk
  13. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    I do have the correct cap. It says 15-16psi. Ill look into this some more. I will pop off that bypass hose and see if there is a restrictor at the radiator. If there is not then I'll fix that issue and retest. If there is a restrictor there still, then its gotta be thermostat or partially...
  14. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    To restate... Only reason I'm not thinking its Not a thermostat is because it does get up to 195-200 on the highway. Just takes forever it seems. And the heat is never very Hot...its kinda lukewarm to warm at best. Just trying to remember... my mom used to have an 03 burban and that thing would...
  15. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Hope u all had a great holiday time with friends and family. Had to do an emergency brake pad slap on the rear of the Yukon. Just pads for now till summer when i put a kit on it. Anyhow...had time to look at the heat and check things out. It was 17F this morning and VERY Windy. Pulled into the...
  16. U

    AC Relay Stuck ON

    Thanks east302! So it is a ground side switched relay and the PCM grounds the coil internally. Something is probably failed in the PCM somehow. Sent from my SM-G975U using Tapatalk
  17. U

    AC Relay Stuck ON

    Reason i say that.. Is disconnecting any AC pressure switch should kill any AC signal from the PCM regardless... You could send that AC request signal all day long a million times and should not have the PCM command the relay on because its missing the inputs from the safety switches. The way...
  18. U

    AC Relay Stuck ON

    In theory... if u had the pressure switches disconnected, no call for AC from the control head, had your power meter backprobed into the pin right on the PCM that provides either ground or power to the AC relay and you...indeed have either ground or power there... Then that would be an internal...
  19. U

    AC Relay Stuck ON

    Ok...so thats a software thing.. If the relay were shorted, or the wiring was the problem it would be on immediately even when cranking the engine. Since theres a delay, then that tells me that something is still giving an AC request. The failsafe for most cars is to default airflow to the...
  20. U

    AC Relay Stuck ON

    Disconnect the HVAC control head and retest.. Problem goes away = bad control head Thats an easy somewhat quick test. If it still is being commanded on, gonna have to look at the wiring diagram. Can remember if its a power or ground side switched relay. When does the clutch engage/come on? Is...
  21. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Ill take a look this weekend if i have time. Yall know how it is this time of year. Holidays and everything is hectic. I know for sure the fan clutch is not seized but... i dont like that it keeps ramping back up somewhat at idle. It will disengage when the rpms go above 1.2k after about 7...
  22. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    I mean..i could be crazy and not seeing something LOL [emoji23][emoji23] But i will for sure double check. If my water pump wasnt pumping correctly then wouldnt i have overheating issues? It was great this summer and i took the truck to colorado this fall and had zero issues there. Sent from...
  23. U

    2000 Yukon-Long warm up time - partial heater core restriction possibly?

    Yes i am not losing coolant. I know that for sure. Sent from my SM-G975U using Tapatalk
  24. U

    Quick cluster question

    So, I have read the sticky threads about the cluster swaps. Definitely some good looking mods in there! On my 2000 NBS yukon, I want to add a trans temp gauge and change some decals/etc. On the 00-02 styles, are these clusters pretty much plug n play excluding mileage? Can I add in the factory...
  25. U

    Rear blower motor resistor??

    does this happen in both manual and automatic modes? If its only in automatic mode, I would definitely check the cabin air temp sensor. Cabin air temp and coolant temperature are the 2 main inputs to the HVAC control head for running the blower speed in auto mode. It keeps the blower pretty...

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