why do I have no heat?

Asked by GuruBZD2H Dec 08, 2018 at 02:43 PM about the 1999 Chevrolet Silverado 1500 RWD

Question type: Maintenance & Repair

I replaced the water pump and thermostat in my
1993 Chevy Silverado.. the upper radiator hose is
warm the lower is cold, and one of the heater hoses
is warm and the other is cold.. I getting nothing but
cold air.. any suggestions to fix the problem would be
great...

2 Answers

F_O_R answered 6 years ago

Possibly air lock. Purge air out of the system. Try Youtube for videos on this subject.

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firebird338 answered 6 years ago

Remove air from system like this remove cap from overflow tank fill with antifreeze to full mark leave cap off and start vehicle and let idle you will notice level in tank start to rise this is normal once thermostat starts to open level in tank will drop add more antifreeze to full mark then put cap back on. If still not getting hot bad or installed wrong way thermostat ( trust me it is very easy to install backwards by mistake ).

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