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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.

372 topics in this forum

  1. 1979 Royal Sierra Questions

    By Crazyone,
    • 1 reply
    • 110 views

  3. 1987 Chevy R20 6V53T Detroit engine swap

    By Gabriel Carriere,
    • 0 replies
    • 136 views

  4. Air Cleaner Questions

    By Jason1976Chevy,   
    • 2 replies
    • 463 views

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

    By Pacfanweb,
    • 35 replies
    • 18.6k views

  6. electrical

    By Terry James,
    • 1 reply
    • 290 views

  7. TH400 oil pan thickness/guage

    By apes,
    • 1 reply
    • 371 views

  8. Does anyone know which truck this grille is from?

    By truetruegjh,
    • 1 reply
    • 441 views

  9. Dashpad repair

    By marinegruntlife0331,
    • 1 reply
    • 7.4k views

  10. My 1986 Silverado

    By Knep115,
    • 3 replies
    • 759 views

  11. 74 gmc 350 start dies

    By mikes74gmc,
    • 3 replies
    • 547 views

  12. Looking for 1970s Chevy 350 truck

    By Randy Sales,
    • 0 replies
    • 667 views

  13. I bought a 1978 GMC Sierra Grande and I need help!

    By dalexa9892,
    • 0 replies
    • 835 views

  14. 1987 Chevy R10 1/2 ton lower control arms

    By Plumbermik,   
    • 2 replies
    • 4.4k views

  15. Replacing stock steering wheel with....

    By 87ChevR10,
    • 0 replies
    • 989 views

  16. 1981 K5 Blazer - Oil Pressure switch wiring

    By mark97213,
    • 0 replies
    • 842 views

  17. Replacing a 1-ton rear end

    By Jhhl,
    • 0 replies
    • 917 views

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

    By يحيى الشريف,
    • 3 replies
    • 1.4k views

  19. 1985 Short bed step side 4wd production numbers

    By Red 85 GMC stepside,
    • 1 reply
    • 2.4k views

  20. 1978 Silverado, K30 Dually, 4x4, Crew Cab (3+3), Long bed.

    By GHV,
    • 2 replies
    • 1.5k views

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

    By Andrew Kapel,
    • 1 reply
    • 1.1k views

  22. Rebuild 700r4, anyone done it?

    By W8MCC,   
    • 4 replies
    • 1.6k views

  23. 1987 R30

    By Jon12345,
    • 1 reply
    • 1.3k views

  24. 1984/85 k2500

    By mikewasilla,   
    • 1 reply
    • 1.4k views

  25. New Neighbor's Square Body

    By AlaskaErik,
    • 1 reply
    • 1.5k views

  26. C20 Driveline Carrier Bearing lubrication?

    By markdafedman,
    • 2 replies
    • 1.4k views


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