spark plugs

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 87 mid canada k5, Aug 6, 2000.

  1. 87 mid canada k5

    87 mid canada k5 1/2 ton status

    Jul 20, 2000
    Likes Received:
    Winnipeg Manitoba Canada
    I've been using ac delco plugs (cr43ts) since I bought my truck in '93, that's what my Haynes manual told me to use. Then last week I go to change the plugs, so I grabbed my blazer manual out of the glove box to check the plug numbers since I'd forgotten them, it says ( r43ts). These are the ones I ended up buying, haven't noticed any difference, I 'm fairly sure the "r" stands for resistor type plug does anyone know what the "c" stands for?

    MIDCAN k5

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