1998 GMC Sierra "replace heater core 200" Questions

...heater core,cylinder heads, water pump, timing chain, and tune up. Also new IAC, fuel and airfilter, ECM module, both coolant sensors,thermostat, coollant, and alternator. after start up the engine ...

...replace the actuator that drives the door for the heater core or cable? make sure both water lines going to the heater core are getting hot, if only one is the mix door is not working properly It the ...

...This is becoming a known problem. The heater core is plugged from the factory it must be replaced. I am a service writer at a dealer and we are putting heater cores in 200 and avengers left and

...the heater core and is ranging 130-145 degrees, old heater core sure seemed hotter. You need to replace the thermostat. This is what regulates the engine temperture. It should be around 180 to

replace the heater core, and I live in Tx not much need to replace at this time. What I need is either a diagram of hoses that go to the heater core and which one would be re-routed and blocked off so

...have no heat but gauge shows 190 to 200 which i believe is normal should i replace heater core or is there something im missing you could backflush the heater core first. that may fix the

...with the thermostat. If the inlet gets hot, but not the return. Your looking at the heater core. If there isn't much change and both feel the same. Replace the water pump. Impellers on them do go

...heater core is flushed as well. If not your heater core maybe going out. your problem is more than likely a worn heater core, also i have seen mice shredding up insulation or other debris and moving ...

...Heater core? what do I check next? the divider door is not opening staying on cool. check the temp. knob out Back flush the heater core could be pluged up with scale, if that don't help than try a ...

full because it is clogged up so coolant can not go down from the top, but it has actually low coolant level due to a leak. Have you replaced the 2 pieces of hoses when you replace the the heater core