the switch on the left of the climate conntrol to adjust blow from low to max broke. i thinnk i have another. the numbers in red on the side of the one i have seem to be 1987857 and below 1040C.on the back are 5 spades and 2 vac lines. im unable to get down there...is this the right part. thanks
these should have it - covers mainly 63-72 , with the odd bit earlier. <center> </center> Master Parts Book - Chassis Section - -- Feb 72 reprint -- 1972 GM Corp <center> </center> Master Parts Book -- Body Section -- -- May 72 reprint -- 1972 GM Corp <center> </center> Master Parts Book Chassis Illustration -- Feb 72 reprint -- 1972 GM Corp <center> </center> Master Parts Book Body Illustrations -- Feb 72 reprint -- 1972 GM Corp
1987857 = 2 port master vacuum switch which is attached and operated by the Blower control switch 1386803 of which has the 5 terminals.
