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  1. S

    Wireing help please

    I was thinking the one in his hand is oil pressure the other is HEI power, but he says the oil pressure gauge is hooked up. Base info on the truck would be helpful. Maybe a picture zoomed out a little more might help. Does the truck have a factory tach?
  2. S

    How many gallons can you put in your gas tank?

    Of course I bought my truck used and had different wanted specifications, like I wanted a C/K 20 or 30 but the only option I had to have was A/C.
  3. S

    Heater Core how to

    @Soundmound no they are not suppose to hiss. I have no idea where you'd get a replacement other than Greg's link.
  4. S

    How many gallons can you put in your gas tank?

    As far as I know what you have said is correct. All the truck C/K 10 - 30 will use the same resistor because they have the same sending unit, the C 50's & C60's use a different resistor, the Blazers and Suburban's I think use the same resistor but is different from all the others. I also...
  5. S

    Heater Core how to

    We I hope someone better with blend doors than me chimes in. One of the problem is blend door issues are so rare on these trucks I haven't had to do much. Like I said if it was in front of me I'd fart around with it until it was right, but it's hard for me to advise you. What I can advise you...
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    Heater Core how to

    @Soundmound Which blend door are we looking at? To be honest with you I'm not the best with blend doors unless they are in front of me and I can move stuff and see how it is working. But I will add this, if you marked all of the rods and such when you disconnected things and it worked before...
  7. S

    How many gallons can you put in your gas tank?

    Ok here is a story for you. My Dad bought a 78' K20 in 80'. Since it was the newest vehicle my parents owned, we took it on a lot of trips, three of us in the cab, Dad, Mom and me. Dad bought a canopy for it that he'd put on before these trips, so there was no passing the nozzle from side to...
  8. S

    Starter wiring problems

    Lets just deal with the alternator for a second. What exactly are you asking? It looks like the plug part is fine. Nothing is attached to the terminal though and your holding loose wire in your hand. Are you asking if that wire is suppose to be on the terminal? Well check and see if there...
  9. S

    How many gallons can you put in your gas tank?

    I fill gas cans, and I have a couple of 15 gallon portable tanks IDK what they are really called, but they are a cylinder that lays on it's side and has little legs to keep it from rolling and a gas pump handle. I should take a picture of one of them. Anyhow the vapor recovery nozzles are a...
  10. S

    How many gallons can you put in your gas tank?

    Your not imaging it you own one! But your truck is a pretty unique configuration and I bet you get a far bit better mileage than most of us!
  11. S

    How many gallons can you put in your gas tank?

    That's been able my experience. And that's how I know I need to switch tanks NOW when the gauge stops moving a little. Like you I can get more than 19 gallon in a truly empty tank. Which brings me to my next point, depending on how sensitive and what type of shut off is on the pump handle can...
  12. S

    How many gallons can you put in your gas tank?

    I think we all have a technique as to how we use the dual tanks. My Dad's truck as an example had a 20 D/S tank and a 16 PS, He hated filling both tanks, so he'd run off the DS tank only, unless he took it on a long trip. For me, because I run my truck a lot I definitely make use of both...
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