Question about 1999 Chevrolet Silverado 1500
Best is to bring it up to temperature, turn it off before it overheats, wait about five minutes and re-start and begin filling again (with heater on full heat) I prefer doing this with the front of the vehicle slightly raised so air travels to the radiator. Also check to see if there are any bleed valves on the engine (should be listed in manual). If you still have a problem, remove the thermostat and see if it still overheats...If so, you may have a new engine with a blown head gasket (if it's a used one) One other item to look at is to make sure that if you have an electric fan, make sure it's working.
I know you just did a lot of work...hope it's something simple!!
Posted on May 13, 2010
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Posted on Jan 02, 2017
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Fig. 1: Remove the coolant recovery tank hose from the water outlet
Fig. 2: Remove the upper radiator hose from the water outlet
Fig. 3: Remove the three retaining bolts for the water outlet
Fig. 4: Carefully separate the water outlet from the thermostat housing
Fig. 5: Remove the thermostat from the housing
Fig. 6: Make sure you replace the O-ring when installing a new thermostat
I hope this helps top solve it (remember comment and to rate this answer). Good luck.
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