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  1. 1980 Big Ten

    Gasoline in vapor canister

    Thanks for the reply. I do have dual tanks and I’ve been wrestling with problems from the start of this project. I have a 3-port valve and my mechanic is wondering whether that’s the problem and whether to replace with 6-port. If you had problems with 6-port then I might have other problems too...
  2. 1980 Big Ten

    Gasoline in vapor canister

    1980 Big 10 running great but smelling gas in the cab. Lifted the hood to find gasoline dripping out of the driver side vapor canister. I assume that means that pressure is pulling gas from the tank to the canister. Any obvious causes or things to check first? Here is the pic of the schematic...
  3. 1980 Big Ten

    Rough Idle / lower RPM

    Just had a 403 Olds rebuilt and the builder said to only use Wix filters from now on. Thought you might want to know that you made a solid choice. Sent from my iPad using Tapatalk
  4. 1980 Big Ten

    Full Tank, No Gas

    Thank you, Bruce. The manual says that the passenger side tank is the main tank. Interestingly, it doesn’t talk at all about the optional driver’s side tank, nor does it give recommendations on how to drive with them. Now that I know, I’ll plan to drive on the main tank and only switch to the...
  5. 1980 Big Ten

    Full Tank, No Gas

    Thank you. I’ll be sure to do that. Sent from my iPad using Tapatalk
  6. 1980 Big Ten

    Full Tank, No Gas

    It’s “run out of gas” on me three times now. The first time, I got about 10 miles down the road. The second time, 3 miles. The third time, 2 miles. After the second and third times, I opened both gas caps to even the air pressure, switched to the right tank, and fired it right up. When it...
  7. 1980 Big Ten

    Full Tank, No Gas

    Thanks for asking. This truck sat in a barn unused for about 30 years, and without having been prepped for storage. After the guy died, his son sold it to a small dealer who had to replace the tanks because the old fuel destroyed the original tanks. It looks like he also replaced the sending...
  8. 1980 Big Ten

    Full Tank, No Gas

    '80 C10 with recently replaced left and right fuel tanks & related hardware (done by someone else). No problems when idling. When driving on a full left tank, the truck acts like it has run out of gas. When I switch to the right tank, no problems at all. Could the problem be the with the...
  9. 1980 Big Ten

    Fuel selector valve leak-by

    Ditto, Chengny—thanks. I’m having a similar problem on an ‘80 C10. Truck runs fine on the RH tank, and idles fine on the LH tank, but I don’t have to drive very far down the road on the LH tank before the truck acts like it has run out of gas. Both tanks and accessories were recently...
  10. 1980 Big Ten

    First Chevy first lowered truck

    Correction: New 1979 Suburban Owner Sent from my iPad using Tapatalk
  11. 1980 Big Ten

    First Chevy first lowered truck

    Thanks for the Coker reference. I just wrote a long answer under the feed: 1979 New Suburban Owner. Sent from my iPad using Tapatalk
  12. 1980 Big Ten

    New 1979 Suburban Owner

    Thanks for the Coker reference. I think their American Classics are perfect for a Sunday drive, but I would never put them on a Big 10 for daily, 4-season driving, and I would never put a load on them. Then I looked at Vogue Classic. They’re rated for extra load. But when I e-mailed them...
  13. 1980 Big Ten

    First Chevy first lowered truck

    Thanks for the reply. Thin line whitewalls. Pic below. Sent from my iPad using Tapatalk
  14. 1980 Big Ten

    First Chevy first lowered truck

    HotRodPC: I have a 1980 Big 10 that came with OEM option whitewalls. It hasn’t been driven for 36 years, and these are the original tires. Part of me feels obligated to put new whitewalls on her. What do you think? Sent from my iPad using Tapatalk
  15. 1980 Big Ten

    New 1979 Suburban Owner

    AMT1379: What did you end up doing about the whitewalls? I ask because I’m struggling to find a decent whitewall replacement for my 1980 Big 10. Sent from my iPad using Tapatalk
  16. 1980 Big Ten

    New 1980 C10 Big 10 Owner

    Catbox: The guy owned a junk yard and he got pissed when she got a few dings early on. So he bought a beater truck for the yard and parked her in the barn for 36 years so she wouldn’t get any more dings. He basically loved her to (near) death. I’m bringing her back and putting her on the...
  17. 1980 Big Ten

    1980 C10 Wheel and Tire OEM Options

    Thank you! I’m a relatively new square body owner so I wasn’t aware of the GM heritage center document. Sent from my iPad using Tapatalk
  18. 1980 Big Ten

    1980 C10 Wheel and Tire OEM Options

    I’m having one hell of a time trying to find a website showing the OEM wheel and tire options that were available on a 1980 C10. Can anyone point me in the right direction? Sent from my iPad using Tapatalk
  19. 1980 Big Ten

    New 1980 C10 Big 10 Owner

    Responding to 78c10big10: You asked about where I dug her up and how much I paid. I waited to answer until I actually had her in my possession. I found her on eBay. It wasn’t easy to title but the seller went above and beyond to help. Insurance appraised her at $21k and fortunately I paid...
  20. 1980 Big Ten

    New 1980 C10 Big 10 Owner

    Thanks for the warm welcome and the compliments, everyone. Yes, those are the original miles and the original tires. Only things new are the gas tanks. Since old gas ruined the original tanks, I’m wondering what else was damaged by old fluids. The engine runs, but I’m not sure whether it...
  21. 1980 Big Ten

    New 1980 C10 Big 10 Owner

    My soon-to-be new ride is a time capsule with 2,600 miles that has been sitting in a barn for the past 36 years. I can’t wait to get her out on the road again where she belongs. I’m grateful for this forum and I hope to meet other enthusiasts who know a thing or two about working on a truck...
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