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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. Low Vaccuum on 350sbc???

    By Cmal7,
    • 13 replies
    • 3.3k views

  2. 1976-78 GMC Royal Sierra

    By ericzand,
    • 1 reply
    • 18.7k views

  3. engine rebuild kit??

    By wesleyak47,
    • 1 reply
    • 971 views

  4. 1978 k20....looking to purchase would like some advice

    By LIVINtheLIFE,
    • 7 replies
    • 1.4k views

  5. 1977 Chevy Silverado half ton Suburban help!

    By chevyidaho96,
    • 3 replies
    • 1.1k views

  6. 1986 sierra 2500 length

    By 03blackz71,
    • 2 replies
    • 893 views

  7. 86 Jimmy

    By Semikrazy,
    • 3 replies
    • 1.5k views

  8. 87 s15 window guides

    By Kylefisher2488,
    • 1 reply
    • 1.2k views

  9. 75 C20 Turn Signal Hardware question

    By 96740,
    • 1 reply
    • 1.1k views

  10. Suspension rebuild kit for 1982 K3500

    By bigblue82,   
    • 0 replies
    • 1.1k views

  11. Blowers

    By daleone3,
    • 0 replies
    • 1k views

  12. Trans Question

    By metallica701,
    • 0 replies
    • 1.1k views

  13. Keep or ditch cab visor?

    By fate0311,
    • 8 replies
    • 8.9k views

  14. 1979 GMC Crew Cab

    By revrnd,
    • 1 reply
    • 4.9k views

  15. vapor canister full of fuel

    By lanky86,
    • 0 replies
    • 1.3k views

  16. Radiator for a 1982 K2500

    By Logan Lanfear,   
    • 0 replies
    • 1.8k views

  17. Just bought a 1982 GMC K2500

    By Logan Lanfear,   
    • 1 reply
    • 2.4k views

  18. 85 Chev Starter Trouble

    By StepsideGMC,   
    • 0 replies
    • 2.4k views

  19. Rally wheels!

    By snapring6r,
    • 0 replies
    • 1.9k views

  20. K5 Blazer sliding Windows for trade

    By theoriginalgregs,
    • 0 replies
    • 1.4k views

  21. 4x4 in reverse noise

    By danran87,
    • 0 replies
    • 1.1k views

  22. 1985 K10 vent window weatherstripping.

    By vietnamvet,
    • 2 replies
    • 1.4k views

  23. 1987 gmc sierra s-15 clutch issue

    By lariosified,
    • 2 replies
    • 1.2k views

  24. 1987 GMC Sierra

    By Blake Stegenga,   
    • 1 reply
    • 2.4k views

  25. My 1st vehicle and 16 yrs later 1 2

    By redhot1.4,
    • 21 replies
    • 3.1k views
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