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  1. Craig 85

    14 bolt question

    2WD 454/TH400 Suburbans got the full float 14 bolts. I had an '88 and my friend had an 87. 4WD got the 14 bolt SF. Also if you bypass the valve on the rear axle your rear brakes will work 100% better. That's a weight sensing proportioning valve. GM has had problems with them. I've removed...
  2. Craig 85

    81'-86' Air Cleaners

    My 85 K30 (454) came with the taller air cleaner lid. I added it to my '79 K15 (350). It's 2" taller (5" air filter). The bases are the same. I took that air diffuser out of both bases without issue. I believe the metal ring attached to the base is actually for flame retarding in case of a...
  3. Craig 85

    Need H6 AC compressor brackets for 454

    If you have the same brackets as mine in the above post, here's how the rest go.
  4. Craig 85

    Dumbo mirrors

    On factory mirrors there are two bolts that clamp the mirror head (#8) in the diagram. I put on LMC mirrors on my truck and it uses Phillips head screws. Mine keep moving, so I’m going to put the LMC mirror heads back on my factory bases and hopefully that will stop.
  5. Craig 85

    Dumbo mirrors

    I found this picture of the OEM instructions , unfortunately they were already cropped. I found another thread on here where I described the location. The center of the mount is about 1/2 way between the vertical post and the wing window handle. The door has a flat area to mount the mirror...
  6. Craig 85

    radiator mounting questions

    I believe the remote bracket is the same from ‘80-85 mid year. I recall my 1980 454 being the same. The bracket changed 1/1/85 through the 1986 model due to the dual smog pumps. I have see people mount the reservoir on the core support. I believe 67-72 was done that was. Only other source...
  7. Craig 85

    454 exhaust recommendations

    I have factory manifolds and all the emissions equipment in this video. Sorry its a short video. I have 2.5" pipe with Flowmaster Super 50's. Also an H pipe in there.
  8. Craig 85

    A whole forum just for GM Squares?

    Thanks for the kind words. I've owned a lot of 2500 Suburbans too (lol). 88, 93, 94, 95, 01 & 04. This was my favorite. A '93 C2500 (454) I factory ordered with barn doors. If only it had the 8.1L...
  9. Craig 85

    Mid-late 90s Bench

    Her's a link to a company that makes those seats. Not cheap though. I noticed in all their pictures now it only shows leather seats. They used to show a lot of cloth back in the day. https://www.qualitex.com/truck-seats/bench-seats.html
  10. Craig 85

    85 K20 Suburban rear shock question w/pics

    I had to do the same thing on my K30. It's been fine for the past 4-5 years.
  11. Craig 85

    A whole forum just for GM Squares?

    We love pictures. Here' my old '80 C20 3+3 that I put an '85 front clip on back in the mid 90's.
  12. Craig 85

    Rear disc conversion with hydroboost system

    @Frankenchevy has a rear disc set up on his truck. Maybe he can provide some input.
  13. Craig 85

    Bench seat latch

    My '79 had a latching seat, unfortunately I don't have any pictures. The seat rested on a bolt that looked very similar to a seatbelt bolt (below). The seat rested on the smooth part of the shank. I don't know if originally there was piece plastic, like a door striker, that covered the shaft...
  14. Craig 85

    USA1 Industries

    FYI Coverlay makes door panels that are similar to the OEM ones, see photo 1. They come complete as you see them. I bought them for my '85. The door inserts on the Coverlay ones are glued on and I plan on removing them. The OEM inserts and trim will fit these panels. You can see the...
  15. Craig 85

    454 w/ NV4500

    This is right from the GM specs for an '85. I'm sure yours are the same. C30 gross trailer weight with a 454 and a 5th wheel kingpin type hitch is listed below. The specs I have are for an automatic (TH-400) and it doesn't say anything about dual rear wheels or Camper Specials. Either I...
  16. Craig 85

    Weird intake vacuum looking thingy maybe

    I have several different types of those on my '85 K30. Here's the vacuum map for my truck. It's a mess, but it all works.
  17. Craig 85

    What is this hanging off my HEI?

    My '80 C20 3+3 454 non A/C, no cruise did not have that, but my "85 K30 454, A/C, cruise does. It mounts at the rear of the driver side valve cover. It triggers the vacuum pod on the front of the carb between 1600-1900 RPM to prevent back fires when decelerating. It's a different set up than...
  18. Craig 85

    1988 IROC-Z

    Back when I had my 2010 CTS-V it didn't come with a spare, just an air pump and a bottle of flat fix. I had to buy one of these spare kits for a standard CTS then get a 1.5" spacer so it could work on the front if I had a flat.
  19. Craig 85

    Who's truck is this????

    I'll give my option on the lift. It's at least a 4" lift if it's a K20. The gray truck is my old '79 with a 4" lift and 33x12.50x16.5" tires (32.8"). This white truck looks taller than that. The wheels on that truck are probably American Racing Outlaw IIs. The ones on my '79 are American...
  20. Craig 85

    Fuel Pump Selection

    FYI if you get a factory 3 port fuel pump for the 454 it is different between the 2WD version and the 4wd version. I ran into this problem about 5 years ago. I'm not sure if the companies have fixed the issue. Carter/Napa was advertising the 2WD pump fit the 4wd. Here's the difference: The...
  21. Craig 85

    Rear bumper bracket solutions?

    I know for sure the van rear axles are wider by about 4", which makes me believe the van bumper is wider than the truck bumper.
  22. Craig 85

    87 R1500 Quad Headlight Question

    To add to this, I had an 80 C20 3+3 in the early nineties I did a front clip swap to an ‘85 and have had two other ‘85s including my current one. All 3 lit 4 bulbs when the high beams were on.
  23. Craig 85

    K20 Wheel/Tire Confirmation

    5.25” of back space is probably too much for what you’re looking for. These aren’t the best pictures of his truck but Frankenchevy has 16x8” wheels with 4.5” of BS. Tires are 285s. They don’t rub, but his truck is a K30 like mine. They are about 2” taller from the factory than a K20. But you...
  24. Craig 85

    87 R1500 Quad Headlight Question

    As you describe in your first post, although those are mounted horizontally. Either the low beam is on or the high beam, but not 4 at a time.
  25. Craig 85

    87 R1500 Quad Headlight Question

    I haven’t seen that book since I sold my K20 in 1991 to buy my first house. FYI the 89-91 Square Bodies and GMT400s do work that way.

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