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  1. hatzie

    Need some HEI Distributor knowledge!

    The original 66 200 I6 Load O Matic distributor doesn't have a stellar reputation and the female cap isn't suited for higher voltage coils. Even if you go with the whole Pertornix distributor they neglected to do the easy upgrade to a male terminal cap to keep the Original Equipment Look. If...
  2. hatzie

    Need some HEI Distributor knowledge!

    DUI will work quite well. Your other option is a Ford Duraspark out of a later rig. HEI works quite well but Ford/AMC Duraspark and Chrysler electronic ignitions worked quite well too. The main advantage of the DUI HEI setup is it's very compact. The downside is the cost. If you want to keep...
  3. hatzie

    Another loose connector. Please help identify.

    Its likely the fuel gauge wire disconnect on the dual tank harness. The female half is the single tank female sender plug. Option NL2 is a separate diagram after the main harness pages.
  4. hatzie

    Occasional fuel loss?

    Could still be the fuel pump depending on the quality level of the new unit you put in two years ago... and the number of miles you cranked to it in the last two years.
  5. hatzie

    Clicking noise

    The solid front axles are essentially full floating axles. The axle stubs stay still and the spindles rotate when the hubs are unlocked. Lock the hubs and see if the noise goes away anyway. Prolly won't change
  6. hatzie

    Clicking noise

    Bad needles in the outer Universals in the axle? Similar to bad CV joints... I always thought of this as a snapping and popping noise. but... The needle bearings around the end of the axle stubs inside the spindles can make ticking a noise when they're on their way out as well.
  7. hatzie

    R12 to 134A

    The big mistake a lot fo folks make is to assume the dryer is OK just because the sytem is still closed. If it's not working then it's been open to some amount of humid outside air... the dryer, in this case, is DONE. Stick a fork in it and get another with fresh desiccant. If you flush the...
  8. hatzie

    R12 to 134A

    As long as it was flushed out completely, the compressor oil was dumped, the fittings swapped, a new accumulator/dryer installed, R12 O-rings swapped to R134a compatible, and the compressor & system has a full but not overfull charge of Ester oil you should be good to go. You may get away with...
  9. hatzie

    In dash plug for PW and PL

    You can re-terminate the door wiring using the correct shells. I'd go that route rather than butt splicing it. The part numbers for the shells are in the GM wiring diagrams. Mouser Electronics has many of the shells that aren't obsolete.
  10. hatzie

    A/C control , no power

    Power enters the Heat/AC control head, then the switch, then the resistor or the AC HI blower relay when the blower switch is set to High on an AC truck. Heat/AC and Heat-only are a sub harness that was installed based on how the truck was optioned. There's a wire from the fuse panel to the...
  11. hatzie

    In dash plug for PW and PL

    @chegny has more experience with these. Hopefully Jerry will pipe up here. Here's his recent post in another thread... Elec. window/ lock harness question
  12. hatzie

    Intellitronix installed

    The Molex connetors like Painless # 40011 are poor at best. I've fought with these connectors in older Eldorado, New FLyer, Orion, Nova, NABI, and Gillig transit coaches. They don't last long in service because the connectors are large and clunky with no strain relief... and they're open to...
  13. hatzie

    New power window relay how-to using negative trigger

    The door shells are the same from 77 on IIRC. Any reason not to use the more efficient 82 and later motor in the 77-81 doors? Kinda like updating the 6.2L diesel from the 27MT to 28MT starter that GM used on the later 6.5L.
  14. hatzie

    Baking or buying wheels?

    I'm surprised you weren't sleeping in the doghouse for a month for that one. SWMBO doesn't want the casserole and cookies to taste like Epoxy, Acrylic, Kynar, Polyester, or ... and I can't say that I blame her. Cancer runs in my family so I'm a little careful of what I ingest. No need for...
  15. hatzie

    Dome and Courtesy light issue

    The harness layouts are shown in the 90 & 91 wiring manuals. Despite the many changes over the years, the layouts GM used on the last two years of the squares provide a reasonable place to start looking for the components... if not exactly where they were placed. I'm a member of several...
  16. hatzie

    Elec. window/ lock harness question

    It's an optional setup. The ones I've pulled were not super seriously integrated with the main cab harness. GM didn't make every truck with electric doors, AC, or NL2 dual tanks so they are sub harnesses that could be added when the line saw the RPO codes on the build sheet. Heat without AC...
  17. hatzie

    Windshield squirter wiring

    If the washer is OK electrically then you can get a replacement diaphragm and gasket kit for the washer setup. You can also get replacements for the internal plastic gears and cams. However, Andy is correct. These have a less than stellar track record for reliablity. I can't remember any of...
  18. hatzie

    Windshield squirter wiring

    PDF apps for your phone generally do quite badly. Open em on your MAC or PC. If it's a real CUCV then you'll need the DOD TMs not the civvy manuals. SteelSoldiers has em for free. Again use a PC or MAC or a decent tablet with the real ADOBE Reader not your phone. That looks like a 1980ish...
  19. hatzie

    Windshield squirter wiring

    What year is the cab?
  20. hatzie

    Favorite cars I have owned....and sold

    M35A2 Deuce 1963 VW 1200 Beetle *1967 3/4 ton Dodge 4x4 pickup 383 *1969 Dodge Polara 500 383 C-Body in drydock. 1970 Oldsmobile Delta 88 *1972 Ford F250 Ranger FE390 1973 Pontiac Catalina 1973 Pontiac Bonneville Wagon 1974 Pontiac Grand Prix 1975 C10 Chevy *1976 K20 Silverado Camper Special...
  21. hatzie

    Value of this truck?

    My 2000 T400 C2500HD and my 2001 T800 K2500HD have 10.5" Full Floaters. GM used the 9.5" SF axles on the lighter GVW 6 lug trucks. Pop that dent out of the bed so it's mildly presentable and replace the missing and duct taped handles so it doesn't look like it's been through the mill. Clean it...
  22. hatzie

    How I hate electrical issues...

    There literally are only four wires in the tail harness. Add an additional three for breakaway battery charge power, Ground, and the Electric brake actuator wire and you get the standard seven terminal trailer plug. I usually find that U-haul or a PO has knackered the tail harness on cars and...
  23. hatzie

    Wiring Diagrams

    You can still get original GM wiring diagrams on evilbay for a pretty reasonable price. There are PDF files in the library
  24. hatzie

    Simplified dual tank with sniper EFI

    This is the reply from Pollack... between the dashes. ------------------------- >Is the 42-159 valve E85 compatible or not? David, That is a good question. I know it’s never been extensively tested for E85 but have not seen any issues. It is possible that the valve may not last as long...
  25. hatzie

    Simplified dual tank with sniper EFI

    Those valves will handle E10 just fine. It was the E85, at eight and one half times that concentration, I questioned. I would change all of the rubber lines to fresh SAE J30R9 hose, including the vapor lines, and use fresh SAE J30R10 submersible hose inside the tank. When the mandated sale of...

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