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  1. Craig 85

    Need help with Parking Brake cable routing on my 84 K20

    You still exist… lol. I haven’t messed with my brakes since I posted here in 2020. If your cables don’t freely move in the housings, I would replace them. Unfortunately I couldn’t find the OEM braided version. They only had the black plastic sleeves. Definitely keep the stock lengths as you...
  2. Craig 85

    Hvac blend door question...

    The vacuum pod on the kick panel is for Max A/C. It ties to the pod on the cowl area behind the hood(exterior of truck). There is another pod near the transmission hump that controls defrost and heat to the floor.
  3. Craig 85

    Need Help With 82 C10 A/C Vacuum Lines.

    I listed the part number a couple posts above. FYI they are getting rare. They have been discontinued since 2011. eBay prices start at $180. GM 470333 or ACDelco 15-71518 Someone has it listed as a Master Vacuum switch. GM only lists it as a Switch Assembly.
  4. Craig 85

    Tire/wheel recommendations

    Years ago I purchased them at Napa Auto Parts. Hopefully you have one nearby.
  5. Craig 85

    Tire/wheel recommendations

    Mr Gasket makes some thin ones. Just make sure your lugs are long enough.
  6. Craig 85

    Which dually - 8.1 vs pre-DEF 6.6?

    One thing to remember in all this @Frankenchevy lives in California and whether it’s gas or diesel he probably won’t be able to tune it. I left CA 3.5 years ago and emissions have only gotten worse since leaving. My understanding is if you do have a tune, it has to be a CARB approved tune...
  7. Craig 85

    Which dually - 8.1 vs pre-DEF 6.6?

    @Frankenchevy there’s always this option. 8.1L. https://trucksales.uhaul.com/Vehicles/Details?postal=94518&sid=815064&equip=JH1707B
  8. Craig 85

    NP203 Speedometer Gear

    My 77 and 79 203 trucks came with one of these speedometer adapters from the factory.
  9. Craig 85

    Which dually - 8.1 vs pre-DEF 6.6?

    I've had three 8.1's. Loved them all. The one thing I will say is make sure it has 4.10 gears (GT5). My favorite of the 3 was this '01 2500HD. I had 285 tires, true dual exhaust, a K&N cold air kit and a Hypertech chip (that's all they had back in '03). It ran great. I could pass people on...
  10. Craig 85

    Tire/wheel recommendations

    Sorry late in the game here. The grey/silver truck was my '79 K15 that came with an old/stiff Rancho 4" lift. Back then it was wearing 15x10" wheels with 33x12.50x15's. The front fenders were trimmed when I purchased the truck. I went to a 4" Tuff County EZ Ride lift when I did the 3/4 ton...
  11. Craig 85

    2000s hydroboost into a square

    Since someone posted on this old thread I’ll add some more info I’ve learned. Not sure if it will work on a Square Body though. The original post was asking about putting on a GMT 800 series hydroboost. I’m part of a couple Suburban 2500 groups. Quite a few guys have switched over to a 2011...
  12. Craig 85

    Need H6 AC compressor brackets for 454

    The brackets I purchased are designed for a Sanden (508 in my case) compressor. Although the HR6 is similar in size I don’t think the it would work with my brackets.
  13. Craig 85

    Hello from Tennessee

    Welcome from Mid-10.
  14. Craig 85

    Tire Size for K10 Heavy Half

    Those wheels look like a 16" wheel, not the standard 15" that would be on it from the factory. If that's the case you could probably run a 285/75R16. Those are only 32.8" tall and about 10.5" wide. If you have an 8" wide wheel or less it shouldn't rub.
  15. Craig 85

    Hello From NorCal

    You have a California HD emissions truck, so no cats. Just make sure all the vacuum lines are connected correctly and all the parts on the air cleaner sticker are in place or you will fail. Check the timing too. FYI look at your fill pipes. They are probably larger diameter than the standard...
  16. Craig 85

    Sway bar for lifted c10

    No clue.
  17. Craig 85

    What is this side duct for?

    The snorkel tube attaches to it. I had to use this silicone tube as an extension as the they don't reproduce the BBC version. I also cut the cap off mine so it works more as a ram air. I don't forge water, so I'm not worried about water.
  18. Craig 85

    HVAC Vacuum setup

    Here a link to a prior thread on this. Look at post #9 for more diagrams. https://www.gmsquarebody.com/threads/hvac-vacuum-controls.29376/#post-587140
  19. Craig 85

    K20 Wheel/Tire Confirmation

    I’m old so I don’t deal with offsets. I know my current truck and several prior ones had 4.5” of back space on my 16” & 16.5” wheels. They had no issues with rubbing even with a 15/36 radial. Current K30 has a 16x10 wheel with 4.5” BS and a 305/70R16 (32.8”) tire. Your 285’s are also 32.8” tall.
  20. Craig 85

    HVAC Vacuum setup

    HVAC and cruise control use the same vacuum canister that originates on the driver’s side. Here’s a diagram. Disregard the area on the left side in the box, it doesn’t apply to your truck.
  21. Craig 85

    HVAC Vacuum Controls

    My ‘85 Silverado only has one vacuum pod on the driver’s side. Early trucks have the passenger side pod.
  22. Craig 85

    Vintage Air Gen V (5) or replace existing compressor, etc., for 1987 R20 Suburban?

    Here’s the page that lists my parts. https://www.gmsquarebody.com/threads/1985-k30-resurrection.18494/page-13 I did use the fan temp sensor for a 350 as I couldn’t find a 454 version at the time. I haven’t had a GMT 400 in 20 years, so I can’t tell you what would interchange other than the...
  23. Craig 85

    Vintage Air Gen V (5) or replace existing compressor, etc., for 1987 R20 Suburban?

    @beady when I added my fan I found out the ‘85 OEM style sensor was discontinued. I used one for a GMT -400. Look around page 13-15 of my build. I listed all the parts and numbers there.
  24. Craig 85

    Vintage Air Gen V (5) or replace existing compressor, etc., for 1987 R20 Suburban?

    I lived in Nor Cal for a couple years after I installed the A/C (95* occasionally) and now in Mid TN with heat and humidity. A/C temps were in the 40s. I only have Boom Mat in the cab right now, still need to add jute and carpet. I only drive my truck 500-1000 miles a year and where I drive it...
  25. Craig 85

    Vintage Air Gen V (5) or replace existing compressor, etc., for 1987 R20 Suburban?

    I actually added it. All my other 454 trucks had it. This truck didn’t have the Z82 tow package which included the aux fan. It was easy to add. The fan is controlled by a temp sensor on the passenger head (OEM setup and parts). It’s basically a ground for the fan relay. It turns on/off at...

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