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86 and 87 speedo the same?

Discussion in 'The Garage' started by Esteban86K5, Apr 17, 2005.

  1. Esteban86K5

    Esteban86K5 1/2 ton status

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    I have an 86 speedo that looks like this
    [​IMG]

    Will this fit in an 87 Blazer? I know the t-case changed so I thought the connections may have changed for the speedo cable too.

    Anyone have some info for me?

    THANKS!
     
  2. zcarczar

    zcarczar 1/2 ton status

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    86 and 87 have the same t-case, the only thing i dont know is about the fuel injection and the speed sensor in the speedo.
     
  3. 85mudblazin

    85mudblazin 1/2 ton status

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    I dont think the t-case changed until 89', they went to the 241 that has the mechanical speedo (only yr 241 with the mechanical speedo) all the later 241's had the electric speedo, so that speedo should work since both yrs would have the 208.
     
  4. Esteban86K5

    Esteban86K5 1/2 ton status

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    For some reason I thought the t-case changed the same year the carb went to TBI. :crazy:
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    GM VSS is the same for all carbed apps from 1981-1990, and TBI C/K '87, R/V truck from '88-89. (think I have those years right...basically, old bodystyle trucks from '81-89 all use the same VSS/speedometer)

    Only change regarding VSS was with the digital speedo's starting in 1990.
     

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