Thermostat And Radiator Flush For Envoy Trailblazer 4 2l Youtube Thermostat and radiator flush for envoy & trailblazer 4.2l easy flush & thermostat to keep your car running cool! keep your car running cool by changing out. The only "flush" i would do is to refill with distilled water (pretty cheap at walmart), and run it to operating temp with the heater on high 2 or 3 times. drain and refill each time. by the time it runs clear (or slightly colored), you will have cleaned out the old coolant in the engine. now refill the radiator with straight coolant, about 1 2.
How To Test The Thermostat 2002 2009 4 2l Chevrolet Trailblazer Gmc Symptoms of a bad thermostat. the thermostat in your 4.2l chevrolet trailblazer (gmc envoy) will fail in one of two ways: it will stay stuck in its open position and let coolant circulate all of the time. it will remain stuck closed and not let the engine coolant circulate at all. when the thermostat is stuck open, you'll see the following. If your car blows hot air when your air conditioner is turned on, try recharging the freon first. 2009 gmc envoy sle 4.2l 6 cyl. see all videos for the 2009 gmc envoy. how to flush the coolant antifreeze in a 2008 gmc envoy slt 4.2l 6 cyl. with petcock, radiator drain flush and burp. 2005 chevrolet trailblazer ls 4.2l 6 cyl. add antifreeze. low coolant levels is all to common top yours up today. 2005 chevrolet trailblazer ls 4.2l 6 cyl. see all videos for the 2005 chevrolet trailblazer. how to flush the coolant antifreeze in a 2004 chevrolet trailblazer ext lt 4.2l 6 cyl. with petcock, radiator drain flush and burp. 2006 envoy coolant temp sensor question | gmtnation. trailblazer, envoy, 9 7x, ascender, rainer, & bravada. does anyone know if coolant temp sensor on 2006 envoy (4.2l) should be about 10° cooler then dash gauge reading when car is warmed up and idling in park. dash gauge shows 210 (right in the middle) but scanner shows my coolant temp.
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