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  1. S

    1994 Suburban K2500 AC

    Thanks for all o your help sir. Very much appreciated!!
  2. S

    1994 Suburban K2500 AC

    Finally finished my AC project for now. Next summer will do a few things to tweak it out. Possibly new lines all around, variable orifice tube, electric pusher fan. It doesn’t cool very well unless on a lengthy drive. Hey nice on the road, it’ll get down into the lower 40s at the vents—outside...
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    A/C Compressor Replacement '94 Suburban

    Sure wish I could get my old 94 to blow cold. I just can’t believe that GM would let a unit leave the factory with an air conditioning system that would not function properly. If I had test driven this thing back in 1994 and the AC didn’t blow cold, I would have bought something else. If that...
  4. S

    A/C Compressor Replacement '94 Suburban

    Any results? Curious if after you deleted the rear air…did the front blow ice cold or is it not stellar? Thanks.
  5. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    @Wildblue19 Any luck with your fan install?
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    Heater and AC controller

    Just out of curiosity, how cold is your AC? Does it blow really cold out of the vents? Does it blow really cold at idle, or do you have to be moving in order for it to blow cold? Thanks. I have a 94 suburban and I can’t get it to blow cold out of the vents. Have practically rebuilt the...
  7. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    Any noticeable difference between the variable and non-variable? I’ll search for the earlier thread. Thanks.
  8. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    Any thoughts on the variable orifice tune that rock auto recommends for a 94? Description says used for issues related to poor AC performance at idle.
  9. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    So, according to the shop manual, my temps and pressures are all that far off. I think I am slightly overcharged. Sure was hoping for some of that 40 degrees at the vent.
  10. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    Excellent. Thank you @HotWheelsBurban !
  11. S

    1994 Suburban K2500 AC

    Just for reference! Info on working in the AC system. https://www.gmt400.com/threads/1996-c1500-reg-cab-ac-not-working-what-all-do-i-need.56235/
  12. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    Which vehicles can stock with the heavy duty fan clutch?
  13. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    Ok. I’m new to the Chevy/suburban world. So, I appreciate your patience. Specifically, the fan clutch…which vehicles and years? TBI? Throttle body injection? My 94 is TBI. Do have this severe or heavy duty fan clutch already? @L31MaxExpress That’s some good looking grub! @Wildblue19 I...
  14. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    Any specific info on the 11-blade fan and severe duty clutch? Like part numbers? @PlayingWithTBI Yes. It’s an after market parallel condenser. @1998_K1500_Sub The cooler on the right is the after market cooler. Yes. Thanks for clarifying. So, flush and go back with only 8oz of PAG 150...
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    88-94 5.7 Suburban A/C Diagnosis and Tuning

    @1998_K1500_Sub I will be removing the secondary oil transmission cooler from my unit. As for the oil cooler…is that what you see in the photo that you posted of my unit on the drivers side radiator stansion? Will the fan interfere with it or will it interfere with the fan? I’m only...
  16. S

    88-94 5.7 Suburban A/C Diagnosis and Tuning

    @Wildblue19 Which parts did you order for your efan project. I have a 94 K2500 that is having same issues you are having. Eerily similar!! Thinking about this helper fan as well! Thanks and good luck!! Also—weather permitting…I’m going to evacuate and recharge per @L31MaxExpress...
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    1994 Suburban K2500 AC

    Well, folks. 58 degrees at the vents. I’m overcharged by roughly 2 oz. Pressures at ambient pressure of 95 are roughly 55 and 300. I went inside and let it idle for a while. I went back out the high side pressure was much higher. Spooky. Thoughts? As a side note….no fan hooked up at the rear...
  18. S

    Suburban storage compartment subwoofer.

    I was think a late mode console between your front buckets, if that’s what you have!
  19. S

    1994 rear AC expansion valve part number

    So, here is the latest. FINALLY!! About a week ago, I called my local Chevy parts desk. I asked him for the part number for the old discontinued OE for my 94 suburban K2500 with rear heat and air controls. He gave me this part number…52413202. Says it is been discontinued for years and he...
  20. S

    1994 Suburban K2500 AC

    Regrouping this week before another busy Saturday working on old SAWLTY! Finally finished flushing entire system front to rear. We replaced condenser, compressor, orifice tube, dryer, high pressure switch at the back of the compresser, cycling switch on the accumulator. Wasn’t sure how to...
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    AC Condenser Switch? 94 Suburban K2500

    I found both high pressure switches at four seasons. Thank you. One is apparently the “system mounted” high pressure switch. The other is the “compressor mounted” high pressure switch. I’m a rookie, but a little confusing to me why these switches have different on and off pressures? At any...
  22. S

    AC Condenser Switch? 94 Suburban K2500

    Question… These PDFs—they are excerpts from which publication? Would be fantastic to find an extremely detailed shop/service/technical manual specific to my vehicle. Can you point me in the right direction? I can’t find any info on this condenser switch. If the switch on the condenser is...
  23. S

    1994 Suburban K2500 AC

    There is no information about this switch on ALLDATA diy. Back to the drawing board.
  24. S

    AC Condenser Switch? 94 Suburban K2500

    Copy that. So, the 94 model has low pressure cycling switch on the accumulater, the high pressure recirculating switch, as well as a high pressure switch in the compressor!? Will read theu these PDFs sometime later tonight! Hmm. Still having difficulty finding the replacement switch!
  25. S

    AC Condenser Switch? 94 Suburban K2500

    Can’t find any info on this connected. Is it a switch, what does it do? I can’t find any mention of it on ALLDATA diy. Any help is appreciated.

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