2001 Other Chevrolet Models Blower Motor

BLOWER CONTROL SYSTEM CHECK Turn ignition switch to ON position. Move blower speed selector switch from low to high positions and listen for an increase in blower motor speed at each switch position. Move blower speed selector switch from high to low positions and listen for a decrease in blower motor speed. If blower motor is inoperative in any or all speeds, go to appropriate diagnostic procedure. BLOWER MOTOR OPERATES ONLY IN HIGH POSITION 2000 Models Perform BLOWER CONTROL SYSTEM CHECK . Go to next step. Check for open in Black/White wire between blower motor and blower motor resistor terminal No. 4. See WIRING DIAGRAMS . If circuit is okay, go to next step. If circuit is not okay, go to step 6 . Turn ignition switch to OFF position. Disconnect blower speed selector switch. Use a DVOM to test switch continuity between specified terminals with switch in medium-low (M1) and medium-high (M2) positions. See BLOWER SPEED SELECTOR SWITCH TEST table. If switch tests okay, go to step 5 . If switch does not test okay, go to next step. Replace blower speed selector switch. See BLOWER SPEED SELECTOR SWITCH under REMOVAL & INSTALLATION. After repair, perform BLOWER CONTROL SYSTEM CHECK . Replace blower motor resistor. See BLOWER MOTOR RESISTOR under REMOVAL & INSTALLATION. After repair, perform BLOWER CONTROL SYSTEM CHECK . Repair open in Black/White wire between blower motor and splice S200. See WIRING DIAGRAMS . After repair, perform BLOWER CONTROL SYSTEM CHECK . BLOWER SPEED SELECTOR SWITCH TEST Switch Position Terminals No. Continuity All..........................1 & 3................Yes Medium-Low (M1)....3 & 4................Yes Medium-High (M2)....3 & 8................Yes HI..........................3 & 5.................Yes BLOWER MOTOR RESISTOR Removal & Installation Disconnect negative battery cable. Remove glove box. Disconnect blower resistor connector. Remove screw and resistor. To install, reverse removal procedure. See Fig. 6 . Fig. 6: Locating Blower Motor & Resistor Courtesy of GENERAL MOTORS CORP.