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  1. U

    Normal idle speed

    Will do. I do think there is a vacuum leak on a PCV tube i think it is? Its on the drivers side of the engine and runs from the middle of the intake manifold down to the rear of the valve cover. I think that line has a small crack in it Sent from my SM-G975U using Tapatalk
  2. U

    Normal idle speed

    Thanks a bunch guys. No problems starting when cold. Sometimes I have issues restarting when its all warmed up. Itll kinda bog and sputter around 200ish for a second or 2 and then itll come out of it and idle normally around 500 Sent from my SM-G975U using Tapatalk
  3. U

    Normal idle speed

    Thank you! [emoji106][emoji106] Sent from my SM-G975U using Tapatalk
  4. U

    Normal idle speed

    Quick question. What is normal idle speed? Mine is a 00 yukon and previous owner has a Tune in the PCM and it idles right there at 500rpm. Is that normal? Just unsure. Man I love my yukon and wanna keep it forever. 191k on her still going strong. Shes clean too!! Sent from my SM-G975U using...
  5. U

    Fan and fan clutch removal during the winter

    Not solving anything really. Was just asking. I figured these radiators are generously sized as it is that theres enough 'radiant' heat rejected from them in the winter time (Assuming 40F temps and below) as it is without the need for the fan. Sent from my SM-G975U using Tapatalk
  6. U

    Fan and fan clutch removal during the winter

    We average down to the 20s in mid winter here in Omaha so I really dont see a problem either. Sent from my SM-G975U using Tapatalk
  7. U

    Fan and fan clutch removal during the winter

    Can I just remove it and leave it off during the winter? 00 yukon Im planning on putting E fans in anyhow this coming summer but was wondering if i could just leave the clutch fan out for now? Dont really see anything negative with how cold it gets here in Nebraska happening. What u guys think...
  8. U

    Outside air coming in near the leg area on passenger side

    Wow... Maybe i should check/proofread first as i seriously messed up the title of this.. [emoji23][emoji23][emoji23][emoji23][emoji23][emoji23][emoji23][emoji23] Sent from my SM-G975U using Tapatalk
  9. U

    Outside air coming in near the leg area on passenger side

    I know I've seen a fix and/or thread on here somewhere describing this but having trouble finding it. My 00 yukon... there is a bunch of outside air blowing in the footwell area. I can feel it just below the glove box. A ton of cold outside air is blowing in right there.. What can I do to fix...
  10. U

    Rear AC works / front does not

    Now... i have a question for you. In your original post you said the dessicant bag broke correct? Well... I am thinking you might have a different problem. Our vehicles use an accumulator which holds the dessicant bag. The accumulator is after both front and rear metering devices and after...
  11. U

    Rear AC works / front does not

    You said the line by the firewall is cold.. are you feeling the evaporator inlet or the outlet? The inlet is the line with the orifice with the two pressure taps on it. The outlet immediately comes out and drops down into the accumulator. Thats the line you want to feel. That outlet should be...
  12. U

    Rear AC works / front does not

    Static pressure check is pretty useless with cars unless its really low on charge. I generally dont read into that value very much. The actual operating pressures will tell you way more than static Sent from my SM-G975U using Tapatalk
  13. U

    Rear AC works / front does not

    You're low on charge or have a restriction. Common issue when the front isn't very cold but the rear is. Rear system is an expansion valve. It can and will adjust itself and when you're low on charge you'll have little to no liquid feed to the front system. You said you checked blend doors...
  14. U

    Wife's escalade taking a while for heat.

    Dont get your hopes up with the thermostat. You probably have a blend door issue or a partial restriction in the heater core(s). Been down this path. Thought my thermostat was opening too soon but, my front heater core has a partial restriction. It will heat but takes a long time and there...
  15. U

    Wife's escalade taking a while for heat.

    Yes to this^^^ Confirm that the temp sensor is actually correct and reading what a scan tool says. If that checks out ok, time to look at coolant levels and blend door controls [emoji106][emoji106] Sent from my SM-G975U using Tapatalk
  16. U

    AC troubleshooting

    Hell yeah... scarf down that dinner [emoji106][emoji106][emoji23][emoji23] Sent from my SM-G975U using Tapatalk
  17. U

    Constant Blinking Snowflake

    This system is NOT supposed to be using the low pressure switch to cycle the clutch. Thats why there are discharge temp sensors and a sensor in the evaporator. The control head is in full control on this one. So... if you're getting a low pressure trip code then that means at some point during...
  18. U

    Heater Control a/c

    Ok what else? Do the lights work if there are any on the control head? Are they buttons that push and click/hold in? Are they just push buttons that light up when you push them? Pretty sure on that older style they have a little orange light on them that lights up when you push them. If they...
  19. U

    Heater Control a/c

    Need to do electrical testing. Start with all fuses and relays. Make sure control head is getting power. Do other functions work? Mode doors, blend doors, blower on all speeds, etc? Could be a bad control head. Gotta test it to know for sure. Sent from my SM-G975U using Tapatalk
  20. U

    Heater Control a/c

    Yup need more info man. What year, etc.. what HVAC control head is in your vehicle? Etc Sent from my SM-G975U using Tapatalk
  21. U

    Low pressure ac switch location

    2013 body styles ONLY have a high pressure cutout. There is NO low pressure safety. Its controlled thru an evap temp sensor Sent from my SM-G975U using Tapatalk
  22. U

    2 interior issues, unrelated but one post A/C and a Seat Belt

    Ok so basically the 00 thru 05 models, the climate control head simply sends an AC request on the class 2 serial data comm to the PCM. PCM handles engaging/disengaging clutch. Best to have a scantool that can see that info. We gotta confirm that the PCM is getting an AC request. If its not then...
  23. U

    Low pressure ac switch location

    someone did all that and didnt check the pressure switch... Wow [emoji16][emoji16] Sent from my SM-G975U using Tapatalk
  24. U

    97 tahoe AC problems

    The key to a properly functioning AC system is being leak free, ZERO moisture, clean condenser coil, and properly functioning radiator fans. If your system leaks, then its useless to pull a vacuum cuz youll just pull air right in and make things worse. Its good to cover all the bases and make...
  25. U

    Sad day.. pretty sure my transmission went out

    [emoji23][emoji23] Yeah when i went to accelerate, rpms went up for like a split second and then it went THUD... into 1st. Hahaha Sent from my SM-G975U using Tapatalk

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