Why won't your blower fan turn off in your 2004 Silverado Everything else works great except it will not shut off and will drain battery?
When the blower motor stays on it means there is a short to
power, or the relay is sticking. 99.9% of the time the relay
sticks. I belive on the 2004 silverados the blower motor relay is
internal to the blower motor resistor. Try to find an auxillary
blower motor relay and if there isn't one then replace the blower