Most likely the Blower Motor Resistor.
Replace shoes brake 2003 Chevy
you have to remove the glovebox, its behind that, it has 2 bolts and a "connector", should be on the left side of the blower housing.
where is the fuse for heated driver seat on 2003 Chevy Silverado>
How do you un lock a raido on a 2003 chevy silverado
a 2003 Chevy silverado taillight bulb uses a 3157
how do you change the knock sensor in a 2003 Chevy silverado 5.3
YES
No, Chevy changed the wiring harness in 2003. and the way it is mounted, it can be made to work though.
Will a 2000 chevy 2500 bumper fit a 2005 chevy 2500
On 03 silverados i belive the blower motor relay is internal to the blower motor resistor. i could be wrong though, check the underhood fuse/relay panel for one.
No there is not. Chevy did not use them on there trucks.
NO there is not. CHEVY did not use them on there trucks.