Where is the blower motor relay?
there isn't one
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 motor resistor.
The ac-heater blower motor stopped working on your 1998 Pontiac Bonneville SE - What could be wrong?
check for voltage at the blower motor on all settings. if no voltage check the blower motor resistor or relay. if it has a resistor it will be right beside the blower motor, if it has a relay it will be the relay on the firewall under the hood.it will probably have a purple,orange,blue,and black wires.