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  1. Matt69olds

    how fast is your power window?

    I did the relay and express down modification on my 81 a few years ago. The windows are pretty fast now. Not new car fast, but definitely better than they were stock.
  2. Matt69olds

    Headlight Dimmer Switch

    Have you tried to adjust the switch? It sounds like the plunger isn’t being pushed into the switch far enough to cycle.
  3. Matt69olds

    Wiring ID help - firewall

    Disconnect the battery. Find the horn relay. There will be an orange wire (power from the horn fuse) green (power from the relay to the horns) and a black (ground trigger for the relay. Remove the horn relay. With the battery disconnected, check for continuity to ground on the green wire. If...
  4. Matt69olds

    Wiring ID help - firewall

    Find the black wire in the turn signal switch connector. Use a jumper wire, ground the black wire and listen for a clicking relay. Off the top of my head, the only dark green wires I can think of would be right turn (which will be in a separate connector on the firewall connector body) temp...
  5. Matt69olds

    Craziest antitheft idea yet.

    I’d be interested in knowing more about the gps tracker
  6. Matt69olds

    700r4 speedo port not spinning at all.

    Obviously, you can’t have a gear with 29.4 teeth, your choice is a 29 or 30. I’d go with a 29, it will probably be close enough.
  7. Matt69olds

    700r4 speedo port not spinning at all.

    If the cable is melted, then it’s almost a certainty that the speedo gear is stripped. The cable probably locked up, which prevents the speedo gear from turning. No more teeth. If you know what gear ratio you have in the rearend, you can use this to calculate what gears you need to make the...
  8. Matt69olds

    Carb Opinion

    Get Cliffs book, and buy the rebuild kit from him. He has the parts to rebuild it RIGHT, and more importantly the parts to calibrate it to run correctly on todays crap fuel.
  9. Matt69olds

    Fuel mixture screws

    Or remove the mixture screws, and use a small cutoff wheel and cut a slot in them. Then you can use a regular screwdriver.
  10. Matt69olds

    What to keep? Sbc questions

    The interior of this is absolutely trashed. Judging from the condition of the seats, door panels, and the fact that both “Oh ****!” handles are torn out of the roof, I would not be the least bit surprised if the previous owner weighed 450 plus pounds. I have never seen a seat a broken down and...
  11. Matt69olds

    What to keep? Sbc questions

    There is a plate bolted to the block where a mechanical pump would normally go. I assume this means one could unbolt the plate and install the parts for a conventional pump?
  12. Matt69olds

    What to keep? Sbc questions

    I haven’t found the intake, looks like everything under the hood including the throttle body is there.
  13. Matt69olds

    What to keep? Sbc questions

    Number one son bought a 94 blazer for cheap. It’s been seriously abused and beat, but has some neat parts/options that will eventually find its way onto his Yukon. I’m not very fluent in sbc stuff. Are any of the later model pass side dipstick blocks desirable? Are any 4 bolt mains? If I...
  14. Matt69olds

    Carb Swap?

    Besides people not understanding how they operate, unfortunately you can’t fix decades of wear and tear with a cheap autozone rebuild kit and a can of carb cleaner. The engine will never run right if the throttle shaft bores are worn out. People never remove the air bleeds to clean out the...
  15. Matt69olds

    Carb Swap?

    Try closer to 40 years!! The “good” Q-Jets started in the early 70s, and production ending in 1990.
  16. Matt69olds

    No brake lights

    Push and pull the hazard light button on column a few times, see if that changes anything. Still no brake lights? Find the brake switch, check for power on the orange wire. If it has power, push the brake pedal, check for power on the WHITE wire. No power, replace the switch or make sure it’s...
  17. Matt69olds

    T/L CTSY fuse keeps blowing

    Put a larger fuse than is specified, you will need some of this!! Disconnect the battery, remove the bolt that holds the firewall electrical connector to the fuse box. There are 3 separate plugs, the smallest of the 3 is the taillight harness. Remove that plug from the bundle, plug in the other...
  18. Matt69olds

    Dash lights not working

    GM used that headlight switch for probably 50 years of car and truck production. I find it difficult to believe not one part store has one in stock. AutoZone’s part number is SW141. I would think orielly, Napa, or any of the other parts stores could find an interchange number for that.
  19. Matt69olds

    1985 K20. Need inspection to get tags. How to wire external horn button?

    The ground trigger in the column is a black wire. Start at the relay in the convenience center. Unplug it, test for power on the orange wire. If you have power, use a fused jumper wire to jump power from the orange wire to the dark green, the horn should sound. Next, test for continuity from...
  20. Matt69olds

    it worked - trans was 'choking' engine at stop....

    More than likely the solenoid is sticking. Once the pan is off it’s an easy fix.
  21. Matt69olds

    1984 Silverado Radio Harness Question

    Pretty sure you will need to add that wire to your existing harness since GM never offered power antenna or amps in the trucks. I think this is the terminal, maybe Napa can get one? I believe there is a wire pinout diagram stamped on the radio case.
  22. Matt69olds

    1984 Silverado Radio Harness Question

    Use the dome light or cigarette lighter power feed, it will be an orange wire. The antenna wire on a GM radio is a trigger wire, it only has power on it with the radio on.
  23. Matt69olds

    Interior parts 92 Yukon

    Good Lord, the late 80s/ early 90s were definitely the dark years of GM interiors!!! Everything we touch breaks on this truck! Looking for good door panels (specifically the pull handles), passenger front armrest (the part that contains the power window switch) passenger side A pillar trim, and...
  24. Matt69olds

    gauges are driving me nuts- gauge power ignition wires?

    This is the gauge fuse.
  25. Matt69olds

    1986 K30 Silverado Torque converter question

    I did a 455 Olds swap on my dads 81 GMC, replacing the olds 350 diesel. The engine is basically stock from an early 70 land yacht. If I had known then what I know know, I would have definitely replaced the factory diesel converter and governor with a gas engine parts. The diesel converter is...

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