Question about 2005 Chevrolet Avalanche
When I first start the truck, it warms up as normal on the temperature gauge, takes about 10 minutes - five-six miles of driving to reach 210 degress. But then the gauge shoots up to to around 230-240 degrees. It will then stay there for another couple miles. Then drops back to 210 degrees like normal. But then I lose my Hot Air from the heater. I do not recall this being a normal condition on the temperature gauge? And the heater used to always blow heat for me. I am not sure if this a Water Pump issue or a Thermostat issue? At first it appeared to be something wrong with the Heating System. But the temperature gauge has me looking to the cooling system issue. Has anyone else seen this before on a Chevy Avalanche?
2005 Avalanche Z71 with 5.3 liter engine
It is most likey a sticking thermostat it either gets stuck closed or open in your case closed so collant isnt getting to the heater core and all you get is cold air blowing into the truck.
its a simple fix you can either do it your self or take it to a mechanic. now remember there are differnt thermostes so think about the climat you live in and get one according to that
Posted on Jan 29, 2009
It is the Water Pump, mine was the Water Pump, they develop a coolant leak on the pump itself.
Posted on Jan 30, 2009
It sounds like a water pump to me. Check the pump for leaks. then tak off the radiator cap. Start it up and watch, to see if the water circulates. (ONLY TAKE THE CAP OFF WHEN ENGINE IS COOL)
Posted on Jan 07, 2009
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Posted on Jan 02, 2017
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Oct 03, 2017 | Chevrolet Avalanche Cars & Trucks
Dec 02, 2012 | 2005 Chevrolet Avalanche
What you describe is quite normal. While the engine is running and the coolant is circulating the thermostat maintains the engine within its operating temperature range. When the engine is switched off there is still considerable heat within the engine and the coolant will continue to absorb this heat. With no coolant circulation, the coolant inside the engine will register a temperature rise to the extent your gauge measures. This temperature rise may persist for up to 15 minutes until the natural thermo-syphon of the cooling system starts to dissipate this heat build up and the engine starts to cool down. Because the cooling system is pressurised, the coolant is prevented from boiling off at this temperature above boiling point. Once the engine is restarted the coolant flow is re-established taking this excess heat from the engine and the system temperature returns to normal.
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