Question about 1998 GMC Sierra

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1998 GMC Serria Van Heater won't blow.

The van heats up according to the gauges, but I get no air blowing for any of the settings. Every once in awhile it will blow air but not every time. Where should I start?

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Start at the relay for the heater/ac making sure it is working. Remove relay and clean it off then replace making sure there is current through to the other side.Use a test light. from there you can go to the blower motor wiring.Under your dashboard. Look for the resistor which is a switch type gadget in between the battery current and the blower. Check to see if there is current passing through to the wiring before getting to the resistor.Replace if nessesary.

Posted on Dec 15, 2008

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