No pictures here, but see sources listed in the "Manual" question below.
For detailed instructions, see the "Related Question" below for that too...
Most likely a bad heater core
A bad heater blower motor resistor would effect one or more blower speeds other than high.
BIG JOB Get a manual on your car from the parts store and it wil have pictures .
how do i change my blower motor on my 2007 malibu
como remplasar blower ac heater paseo 1993 toyota
Remove the glove box. The front blower motor and the resistor can be accessed from there.
The most likely problem with the heater blower on your 2003 Sable is the blower resister. The resister can go bad and cause you to only have one speed.
how do you change heater blower resister merc a class
Look behind the glove box. under dash.
the heater blower is located under the dash on the passenger side. easy to change ,4 skrews.
Are you asking about the heater blower motor or the engine cooling blower motor?
You'll find the heater blower motor resistor in the heater/air conditioner compartment. This compartment is location underneath the dashboard. This is the part that allows the heater blower motor to change the fan's speed.