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  1. R

    How much rust if any.....

    .... should be under the distributor cap and on the reluctor wheel? This is on a 1990 Sierra 1500 2WD.
  2. R

    Pressure Switch Part Numbers

    I am converting my 1990 GMT400 from r12 to 134a. Does anyone have the part numbers for the pressure switches of the r4 compressor and dryer? Thanks, Rick
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