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1973-1987 Chevrolet & GMC Square Body / Rounded Line Pickups

General and technical discussion for 1973 through 1987 Chevrolet and GMC pickup trucks. These years were otherwise known as "square body" pickups, although GM officially called them "rounded line" designs. Parts wanted and for sale encouraged.

354 topics in this forum

  1. 1984/85 k2500

    By mikewasilla,   
    • 1 reply
    • 158 views

  3. New Neighbor's Square Body

    By AlaskaErik,
    • 1 reply
    • 134 views

  4. C20 Driveline Carrier Bearing lubrication?

    By markdafedman,
    • 2 replies
    • 208 views

  5. Just purchased a 1975 C5 with a 366 - where to buy parts??

    By Todd Butler,
    • 1 reply
    • 256 views

  6. turbo400 trans

    By andrew futter,
    • 0 replies
    • 165 views

  7. Does Anybody Have A Royal Sierra? 1 2 3

    By royalsierraguy,
    • 33 replies
    • 23.3k views

  8. Np203 jerking question

    By Thomas Mann,
    • 0 replies
    • 237 views

  9. Hard staring 305 with Rochester carb.

    By Rocky Roads,
    • 1 reply
    • 483 views

  10. Old Blue for sale

    By Stanley Preskitt,
    • 0 replies
    • 808 views

  11. 75 C30 Rear Drum Brake Locked Up

    By David Nicholas,
    • 0 replies
    • 494 views

  12. 1976 GMC Eleganza Stalling Issue

    By Janet Rocco,
    • 0 replies
    • 473 views

  13. 83 1500 8ft bed cab and bed swap onto a 2013 1500 4wd 8foot bed chassis

    By Robnj51,
    • 0 replies
    • 485 views

  14. 1985 Short bed step side 4wd production numbers

    By Red 85 GMC stepside,
    • 0 replies
    • 492 views

  15. Loud Engine Knock While Accelerating

    By ArcticCatIV,   
    • 0 replies
    • 909 views

  16. 79 short box stepside project

    By ottoman,
    • 0 replies
    • 597 views

  17. 1973 power window switches

    By Dawson Garland,
    • 1 reply
    • 625 views

  18. 87 chevy tbi 350 no fuel

    By Markus Escamilla,
    • 0 replies
    • 948 views

  19. New here, but not a square body owner yet

    By blazblu82,
    • 0 replies
    • 524 views

  20. Help Identifying wheels.

    By ToddSw,
    • 7 replies
    • 1.1k views

  21. Troubleshooting

    By Cladiesel,
    • 0 replies
    • 895 views

  22. 1986 chevy c10

    By Seth Putnam,
    • 2 replies
    • 992 views

  23. 85 C10 throttle cable bracket

    By breadstick,
    • 0 replies
    • 1.5k views

  24. Bring My Old Drag Truck Back To Life 1 2 3

    By Pacfanweb,
    • 33 replies
    • 14.7k views

  25. Brass radiator tank replacement

    By d9gdon,
    • 0 replies
    • 1.5k views

  26. Wheel cylinders 77 C10

    By Benjamin Peter Trout,
    • 1 reply
    • 959 views


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