The combination valve can be disassembled, cleaned out, and rebuilt with new seals if you're inclined to do that.
Disassembly: 1993 - 1996 GM 10223533 Combination Valve Autopsy | Muscle Car Research LLC
Rebuild: 1993 - 1996 GM 10223533 Combination Valve Rebuild | Muscle Car Research LLC
Proportioning valve
I need to know where I can locate a proportioning valve for my 1996 Impala. Delco part number 172-2104. Can anyone provide some guidance or help.
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