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the blower motor is usually under the dash on the passenger side the resitor will be near it on the outside or you may have to pull the blower motor and it could be in there the motor is not hard to pull
Sounds like debris in the blower assy. Probably leaves, or my favorite - kids\' candy wrapper. Start with the thinnest extension you can find for your vacuum. Make sure the engine is off, blower off, key off. Squeeze it down through the vent nearest the blower motor. Wiggle it around to get as far into the blower assembly as possible. You may have to pull leaves out with the hose, they\'re too big to suck up.
here are the instructions for fan blower removal. remove lower right dash insulator panel from under glove box. slide the body control module aside for access to the blower motor.( bcm ). remove the 3 screws that hold it in. pull the blower motor and fan straight down and dis connect electrical connector. if replacing blower motor, remove fan to put on new motor. 99 olds cutlass, have a good day !! just take your time and it is not that hard.
Check under dash, passenger side, if necessary, remove cover to access Blower Housing Assy., the harness has two terminals, one for the Blower Motor and one for the Blower Motor RESISTOR which is fastened by two 7 or 8 mm. screws to the Housing.
Here is a picture of the Blower Housing Assy. showing the Resistor.
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Check the resistor for the motor speeds , it's usuall mounted in the vent ducting near the motor assy, 4-5 wires sometimes that look like a series of springs or similar ! ( governs the various speeds )
HVAC blower motor and fan axcess is under the hood in the center of the firewall. Its easy to remove start by using a large screwdriver to slightly bend foward the engine removal lift eyelet right in front of the fan motor for clearance to remove blower. Unplug the 1 power wire going to the blower, Then remove the 5 or 6 ,7mm bolts retaining the assy to the firewall the pull it out.. while its out clean out any debris in the blower case (leafs ect ) Hope this helps Good luck
Most likely has a shorted blower resistor, and/or wiring connector problem at blower motor. Can check resistor easily by pulling it out and looking at the circuit board. If it is shorted, you will see burnt marks on it. Can access, but is kinda hard to reach, between blower motor and cowl wall (firewall).
you need to remove your glove box assy.(beleave only 2 screws and pivot clips) make sure its not anything from glove box that has slipped behind. once box is out uf way you can access easier the blower motor assy. it actually attaches into blower box from bottom side. when looking at you will find three screw/bolts fastening motor to casing. remove those and then slowly lower motor and fan cage(attached to motor shaft) out from housing. sometimes it takes a little convincing to come out but not real tough. once out you most likely find the object causing noise in fan cage or resting up on lip area of housing unit. once found install in reverse order. let me know if this helps or if we need to dig a little deeper into! good luck!
the heater blower motor is located undr the glovebox there are 3 small bolts holding it in place, 7/32 socket i believe after loosening these you will most likely have to move the wirring harness that goes through the floor to get the motor to drop down. after the you get the motor to drop down there is a large vaccum line that goes into the side of the motor gently pull this out be careful not to pull the other end of the vaccum line loose from inside the car. the is a power plug in the side of the motor that u will need to unplug to free up the blower. because it is hard to see the power plug needs to be pressed down on the top and pulled simaltaniously.