Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1999LESABRE V6-3.8L VIN KREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL MODULE HVACSERVICE AND REPAIRHVAC SYSTEM - AUTOMATIC
1999 Buick LeSabre V6-3.8L VIN K
HVAC System - Automatic
1999 Buick LeSabre V6-3.8L VIN KSECTION HVAC System - Automatic
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the rear engine sight shield.
3. Disconnect the positive booster cable from the multi-use relay center.
4. Move the underhood fuse block out of the way.
5. Disconnect the electrical connectors from the [1][2]blower control module.
6. Remove the [1][2]blower control module from the blower module.
INSTALLATION PROCEDURE
1. Install the [1][2]blower control module to the blower module.
2. Connect the electrical connectors to the [1][2]blower control module.
3. Move the underhood fuse block to the original position before removal.
4. Connect the positive booster cable to the multi-use relay center.
5. Install the rear engine sight shield.
NOTE: Refer to Fastener Notice in Service Precautions.
6. Connect the negative battery cable.
Tighten
Tighten the negative battery cable to 15 N.m (11 lb ft).
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the rear engine sight shield.
3. Disconnect the positive booster cable from the multi-use relay center.
4. Move the underhood fuse block out of the way.
5. Disconnect the electrical connectors from the [1][2]blower control module.
6. Remove the [1][2]blower control module from the blower module.
INSTALLATION PROCEDURE
1. Install the [1][2]blower control module to the blower module.
2. Connect the electrical connectors to the [1][2]blower control module.
3. Move the underhood fuse block to the original position before removal.
4. Connect the positive booster cable to the multi-use relay center.
5. Install the rear engine sight shield.
NOTE: Refer to Fastener Notice in Service Precautions.
6. Connect the negative battery cable.
Tighten
Tighten the negative battery cable to 15 N.m (11 lb ft).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.