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Dave Nova
Dave Nova, Chevrolet Technician
Category: Chevy
Satisfied Customers: 19452
Experience:  ASE Master Certification. GM World Class Certification
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Chevrolet Express 3500: 1999 Chevy Express 3500 van, blower

Customer Question

1999 Chevy Express 3500 van, blower keeps running with switch off and kills the battery. Relay? Module? ???
Submitted: 2 years ago.
Category: Chevy
Expert:  Dave Nova replied 2 years ago.
Hello and thank you for trusting me with your question. My name is ***** ***** I will do my best to help you with your Chevy problem.
Does the blower run on high speed with the key off? When the key is off and the fan is still running, can you control the fan speed from the switch?
Customer: replied 2 years ago.
Runs on one speed. Switch will not control or change it
Expert:  Dave Nova replied 2 years ago.
Remove the 60 amp blower fuse from the underhood fuse panel. If the blower stops running then the problem is in the high blower relay. The relay is part of the blower resistor, so the resistor will have to be replaced. The resistor is located next to the blower motor (closer to passenger side) under the hood at firewall.