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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.

268 topics in this forum

  1. No fuel 1 2

    By Gallia Khaskey,
    • 18 replies
    • 295 views

  3. Pump Accelerator Won't Start without priming with fuel

    By RDV,
    • 1 reply
    • 61 views

  4. 1978 GMC Royal Sierra

    By willevans2,   
    • 3 replies
    • 133 views

  5. 1973 C60 wheel cylinder parts

    By Diesel80,
    • 3 replies
    • 67 views

  6. 1979 k20 fleetside Cheyenne fuel sending unit

    By Jon Rush,   
    • 1 reply
    • 70 views

  7. Tail lights stop working when I put my headlights on

    By Jon Rush,   
    • 2 replies
    • 53 views

  8. Longer legs

    By azdarth,
    • 0 replies
    • 73 views

  9. 4l80e

    By Jbstep,
    • 2 replies
    • 99 views

  10. Tranny problems 1 2

    By Corys1986,
    • 20 replies
    • 329 views

  11. Starting problems

    By 81 gmc,
    • 2 replies
    • 87 views

  12. power problem to fuse block

    By sean jordan,   
    • 1 reply
    • 112 views

  13. Factory auxilliary electric fan actuation

    By vucelick,
    • 0 replies
    • 81 views

  14. Power window stuck

    By Steven Rodriguez,
    • 1 reply
    • 89 views

  15. 87 Chevy 5.7 will not run while in gear 1 2

    By 87chevys5.7,
    • 24 replies
    • 517 views

  16. Sloppy STeering

    By Mike Green,
    • 0 replies
    • 105 views

  17. 1985 Silveardo K20 in a Short Bed? 1 2

    By mark97213,
    • 19 replies
    • 520 views

  18. Using assembly lube on an already broken in engine

    By 07sierra8.1,
    • 3 replies
    • 178 views

  19. Bring My Old Drag Truck Back To Life 1 2

    By Pacfanweb,
    • 23 replies
    • 3,147 views

  20. CUCV?

    By sdeeter19555,
    • 3 replies
    • 180 views

  21. Dashpad repair

    By marinegruntlife0331,
    • 0 replies
    • 200 views

  22. 85 c10 LQ9

    By marinegruntlife0331,
    • 1 reply
    • 120 views

  23. Show me all the Squares

    By SarahsGMC,
    • 8 replies
    • 1,175 views

  24. 1986 Chevy G10 Van Vacuum Hose Diagram

    By 1986ChevyG10,
    • 2 replies
    • 2,302 views

  25. Fuel delivery issue please help 1 2 3

    By tnewman021,
    • 39 replies
    • 489 views

  26. Can I drive with a hole in transfer case? What i

    By Top,   
    • 5 replies
    • 231 views


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