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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.

382 topics in this forum

  1. Replacing a 1-ton rear end

    By Jhhl,
    • 0 replies
    • 1.7k views

  2. for sale Grill Chevy GMC Pickup Truck Jimmy 1977-1978-1979-1980

    By يحيى الشريف,
    • 3 replies
    • 5.1k views

  3. 1985 Short bed step side 4wd production numbers

    By Red 85 GMC stepside,
    • 1 reply
    • 4.7k views

  4. 1978 Silverado, K30 Dually, 4x4, Crew Cab (3+3), Long bed.

    By GHV,
    • 2 replies
    • 3.3k views
    • GHV
    • GHV

  5. Np205 stick in 2wd position But driving in low range

    By Andrew Kapel,
    • 1 reply
    • 1.9k views

  6. Rebuild 700r4, anyone done it?

    By W8MCC,   
    • 4 replies
    • 2.8k views

  7. 1987 R30

    By Jon12345,
    • 1 reply
    • 1.8k views

  8. 1984/85 k2500

    By mikewasilla,   
    • 1 reply
    • 2k views

  9. New Neighbor's Square Body

    By AlaskaErik,
    • 1 reply
    • 2.1k views

  10. C20 Driveline Carrier Bearing lubrication?

    By markdafedman,
    • 2 replies
    • 2.1k views

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

    By Todd Butler,
    • 1 reply
    • 1.7k views

  12. turbo400 trans

    By andrew futter,
    • 0 replies
    • 1.6k views

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

    By royalsierraguy,
    • 33 replies
    • 30.4k views

  14. Np203 jerking question

    By Thomas Mann,
    • 0 replies
    • 1.5k views

  15. Hard staring 305 with Rochester carb.

    By Rocky Roads,
    • 1 reply
    • 1.8k views

  16. Old Blue for sale

    By Stanley Preskitt,
    • 0 replies
    • 2k views

  17. 75 C30 Rear Drum Brake Locked Up

    By David Nicholas,
    • 0 replies
    • 2k views

  18. 1976 GMC Eleganza Stalling Issue

    By Janet Rocco,
    • 0 replies
    • 1.6k views

  19. 83 1500 8ft bed cab and bed swap onto a 2013 1500 4wd 8foot bed chassis

    By Robnj51,
    • 0 replies
    • 1.5k views

  20. Loud Engine Knock While Accelerating

    By ArcticCatIV,   
    • 0 replies
    • 3.4k views

  21. 79 short box stepside project

    By ottoman,
    • 0 replies
    • 1.7k views

  22. 1973 power window switches

    By Dawson Garland,
    • 1 reply
    • 1.5k views

  23. 87 chevy tbi 350 no fuel

    By Markus Escamilla,
    • 0 replies
    • 1.9k views

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

    By blazblu82,
    • 0 replies
    • 1.3k views

  25. Help Identifying wheels.

    By ToddSw,
    • 7 replies
    • 2.6k views
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