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  1. M

    Fuel mixture screws

    I have a 1980 GMC Sierra classic with a 350 cid motor. It has a Rochester four barrel carb, number 17063425. There are silver buttons where the idle mixture screws are supposed to be. Does anyone know what the deal is and how I access the mixture screws? Motor runs rough at low idle and...
  2. M

    Trailer brakes

    Hey y,all. Does anyone know how to disconnect or remove the trailer brakes on my 1980 GMC Sierra 2500 4x4 truck? I don't know why but they are locking my rear brakes. I really don't need trailer brakes anyway. Thank you.
  3. M

    Dual tanks dilemma

    Just purchased 1980 GMC Sierra classic 4x4 with dual tanks. Seller filled drivers side tank, passenger side was empty. Missing gas cap on drivers side. Half mile from Sellers house truck died; no gas. Seller paid 15 mile towing bill to my house. Not getting current to fuel selector valve in L or...
  4. M

    Going square, again.

    Hello, just joined. I am glad for Square body enthusiasts. I loved them in the seventies and eighties when I owned my first 78 chev 4x4. I just bought a nice condition 1980 Sierra Classic 25 4x4 and am very excited.

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