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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. Dashpad repair

    By marinegruntlife0331,
    • 4 replies
    • 13.3k views

  2. Throwback Tuesday

    By revrnd,
    • 0 replies
    • 208 views

  3. Door Adjustment

    By apes,
    • 0 replies
    • 801 views

  4. 79 C10 inline six exhaust manifold HELP!!!

    By cobi smith,
    • 0 replies
    • 312 views

  5. 1987 Chevy R10 1/2 ton lower control arms

    By Plumbermik,   
    • 3 replies
    • 9.4k views

  6. 1979 Royal Sierra Questions

    By Crazyone,
    • 2 replies
    • 3.3k views

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

    By Pacfanweb,
    • 41 replies
    • 24.4k views

  8. Big tube headers, big block, what works?

    By Pacfanweb,
    • 2 replies
    • 1.5k views

  9. Replacing stock steering wheel with....

    By 87ChevR10,
    • 3 replies
    • 3k views

  10. 1981-82 Rear Tailgate Lower Mldg

    By Bad Bowtie2,
    • 0 replies
    • 440 views

  11. My 1986 Silverado

    By Knep115,
    • 4 replies
    • 1.9k views

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

    By truetruegjh,
    • 2 replies
    • 1.9k views

  13. Air Cleaner Questions

    By Jason1976Chevy,   
    • 3 replies
    • 2.6k views

  14. I need some help

    By Zach Hertzig,   
    • 2 replies
    • 972 views

  15. Check Engine Light Replacement Unit

    By 84bluebody,
    • 4 replies
    • 755 views

  16. 17x10 Eagle Alloy wheels with 315/70R17

    By Maren,
    • 0 replies
    • 1.1k views

  17. Need a custom power steering hose

    By BigFoote Mobile Auto,
    • 1 reply
    • 949 views

  18. Engine stops when clutch pushed in.

    By Richard Waters,
    • 0 replies
    • 1k views

  19. 1987 Chevy R20 6V53T Detroit engine swap

    By Gabriel Carriere,
    • 0 replies
    • 1.3k views

  20. electrical

    By Terry James,
    • 1 reply
    • 1.2k views

  21. TH400 oil pan thickness/guage

    By apes,
    • 1 reply
    • 1.4k views

  22. 74 gmc 350 start dies

    By mikes74gmc,
    • 3 replies
    • 1.6k views

  23. Looking for 1970s Chevy 350 truck

    By Randy Sales,
    • 0 replies
    • 1.6k views

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

    By dalexa9892,
    • 0 replies
    • 1.9k views

  25. 1981 K5 Blazer - Oil Pressure switch wiring

    By mark97213,
    • 0 replies
    • 1.7k views

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