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  1. Dmack

    Brake Booster question...

    That was my guess before I read your 2nd post. The switch can be accidentally moved fairly easily. That's ok, we like easy fixes.
  2. Dmack

    Anyone going to the Portland Swap Meet this year (2025)?

    We have gone for probably the last 12 years or so. Always enjoyed it. Last year noticed that the Expo Center one was maybe only 50-60% of the booths that were there before. The lower parking lot was now just parking (used to be all booths), and the buildings were pretty empty compared to...
  3. Dmack

    Please help. 84 blazer

    Just a wild guess. Have you pulled the cap and made sure the cam is actually spinning the distributor shaft/rotor? Rotor center button contacting the cap when seated?
  4. Dmack

    No crank. No power at all 1885gmc 2500

    Fusible link?
  5. Dmack

    Lets see them flatbed builds!

    This is how I got my 83 k20 from my son. I'm not a flatbed fan so I took it off. My son is now talking about putting it on his 95 F350 CC.
  6. Dmack

    Rally wheel colors?

    I went to a dark metallic Grey on mine for my 70 C10 project.
  7. Dmack

    dash gauge bezel mods

    I replaced all the smaller factory gauges in mine with some basic 2" oil, volt, temp, and tach gauges. Just opened up the factory holes and taped over the printed circuit in the area so it didn't short out. Good enough for my daily driver
  8. Dmack

    Paul's 1972 Truck...

    Whenever I hear people talking about 3" exhaust, I think back to my high school days when you had to pay extra to upgrade to the big 2" exhaust. Looks great. Reminds me that I haven't done anything on my 70 for a few weeks.
  9. Dmack

    Let’s slay this dragon…

    Pegged past full means an open circuit. Look for a disconnected, broken, etc wire. You may be able to see the connection on the tank while installed at the bed gap.
  10. Dmack

    New wiring dosnt do anything when key is on.

    Just remembering, I think the headlight circuit doesn't work like a traditional circuit. Something like it's the ground side that is switched , so if you were trying to use a different harness, it's tough to integrate the two. Could be way off, so hopefully those more knowledgeable will chime in.
  11. Dmack

    New wiring dosnt do anything when key is on.

    If it's an aftermarket harness, I would guess that if you have the main power input hooked up to the new fusebox, a good ground, and a complete circuit with fuse, that circuit should work. If it's a factory harness, check the fusible links as they feed most of the circuits.
  12. Dmack

    Advice on Transmission Fluid Change for 1980 C10

    TH350, aka turbo 350
  13. Dmack

    Saginaw Steering Gear Rebuild - Special Tools?

    Do a search on the forum. When I was resealing mine, I found a few detailed posts. Vince (Vbb199 had a very detailed write up iirc).
  14. Dmack

    brake pedal has no pressure

    If you can't see any active leaks, you may have a problem with the master cylinder. Either defective or needs bleeding. Did they ever work for you or just go out? Is it a project you just got and had no brakes?
  15. Dmack

    Let’s slay this dragon…

    Hate to state the obvious, but you will probably just have to start tracing wires to.see where they go. You will probably find one of the added wires will go to the HEI, since it wouldn't have that provision on a diesel. My 83 also was a diesel to gas conversion. Mine was such a mess, I...
  16. Dmack

    Help with gauge cluster lights

    The twist-in bulb holders are replaceable. You can also take a pencil eraser and gently clean the area they contact the printed circuit. Also, if you are trying to replace them with led bulbs, be careful. They don't always work and don't mix well with standard bulbs.
  17. Dmack

    Fuel Gauge Tank Selector switch and valve

    Gauge stuck at 9 o'clock means you have an open circuit, so something isn't connected/broken wire/etc. I fought mine for a while before finding it was a bad dash selector switch.
  18. Dmack

    HELP! My truck won’t start!

    Another option is to turn it over until the timing mark is at tdc. Pull the cap and the rotor should point to either #1 or 180 degrees off. If not, you are off.
  19. Dmack

    HELP! My truck won’t start!

    Pull the cylinder 1 plug, put your thumb over the hole and bump it over until the compression bumps your thumb off. Should be #1 coming up on the compression stroke. Look at your timing mark and see if it is close to tdc. If you are off a terminal on the cap, that would put the mark 45...
  20. Dmack

    HELP! My truck won’t start!

    Double check your firing order. Make sure you didn't switch some wires or move the whole set over a terminal.
  21. Dmack

    Homemade and modified tool thread

    For those who have fought the slide hammer for pulling dents with a stud welder not gripping the pins, especially the garbage one that comes with the Harbor Freight kit. I took a 1/2"drill chuck and adapted it to the slide hammer. Slide it over the pin, grip the outside of the drill chuck...
  22. Dmack

    Help - Inherited a 1978 C20 with SM465 disassembled

    No help on the internals, but since they are basically bulletproof and not rare, I would just look for a cheap used one. But good for you for using what you have.
  23. Dmack

    Fuel Gauge past full

    3 o'clock means you have an open circuit, like a broken wire, unplugged, etc. 9 o'clock means it's grounded somewhere.
  24. Dmack

    Discussion and Opinions on 83'-87' Builds

    My 83 K20, 4sp, 350, 4" lift on 315/75R16
  25. Dmack

    Need Help with Rear Brakes.

    You didn't say year/model. Some of the later HD trucks had a load sensing valve on the rear axle that can cause problems.

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