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  1. Courchained

    Coolant temp fluctuating up and down

    Hey guys so I have a 98k2500 5.7 ecsb. I can watch my coolant temp guage on the cluster from a cold start slowly rise to 195ish then drop to 160ish within seconds. It then slowly rises back up to 195ish then drops. I can't seem to get this figured out. Truck has a new delco wp and tstat. Also...
  2. Courchained

    Defrost wont blow heat

    My floor and body vents blow hot but when switched to defrost no heat os present. I do have air flow but no heat. I'm thinking this is an actuator/door issue. This is a new issue after heater core replacement. Anyone have any input? FYI it's a 98 k2500 5.7 ecsb
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