Question about 2001 GMC Sonoma Extended Cab
You probably have a plugged heater core or radiator.Very common for these models with the dex-cool anti freeze.Check the hoses going to the heater core.They should be hot to the touch.Not warm but hot when the vehicle is at normal operating temperature.When it is cooled down and there is no pressure on the radiator cap,check the radiator and make sure the system is full.If the system is low you will not get heat.If this is the problem then check for leaks.If this has a 4.3 look for and intake gasket leaking.Hope this helps.Good luck.Let me know what you found.
Posted on Sep 15, 2010
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Posted on Jan 02, 2017
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