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Discussion Starter · #1 ·
i have a 91 DeVille, 4 door, 4.9L, i did the complete tune-up, also changed radiator and thermostat(190), in the summertime, heater warmed up, now that its cold it don't get hot,, would i have have to repurge the system or what.......i did do a complete flush even the heater core,,,,,what could be my problem
 
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