Before You Begin:
* Disconnect the negative battery cable: This is crucial for safety to prevent electrical shocks.
* Gather your tools: You'll likely need screwdrivers (Phillips and possibly flathead), pliers, possibly a socket set, a trim removal tool (to avoid scratching plastic), and possibly a small pry bar. You might also need a new cabin air filter while you're in there.
* Have the new blower motor on hand: Make sure it's the correct replacement for your vehicle.
General Steps (May Vary):
1. Access the Blower Motor: This usually involves removing parts of the dashboard or accessing it from under the dashboard. The exact procedure varies greatly depending on whether you have a full-size Blazer or a smaller model. Your repair manual will guide you through this critical step. Expect to remove some trim pieces, possibly the glove compartment, and maybe even parts of the dashboard. Take pictures as you go to help with reassembly.
2. Disconnect Electrical Connections: Once you have access to the blower motor, carefully disconnect the electrical connector(s) from the motor. Take note of how they connect for easy reassembly.
3. Remove the Blower Motor Housing: This often involves removing screws or bolts holding the housing in place. This housing usually surrounds the blower motor and its fan.
4. Remove the Blower Motor: The blower motor itself is usually held in place by screws or a retaining clip. Carefully remove these fasteners and take the blower motor out of the housing.
5. Install the New Blower Motor: Carefully install the new blower motor, making sure it sits correctly in the housing and is securely fastened.
6. Reconnect Electrical Connections: Carefully reconnect the electrical connectors to the new blower motor, ensuring they are properly seated.
7. Reassemble Everything: Carefully reassemble the blower motor housing, and then put back all the dashboard parts and trim pieces you removed. Refer to your pictures or the repair manual.
8. Reconnect the Negative Battery Cable: Once everything is reassembled, reconnect the negative battery cable.
9. Test the Blower Motor: Turn on your vehicle's HVAC system and test the blower motor at different speeds to ensure it's working correctly.
Important Considerations:
* Repair Manual: A repair manual specific to your 2000 Chevy Blazer is absolutely essential. Generic instructions can't account for variations between models and trim levels.
* Patience: This is not a quick job. Take your time, be methodical, and double-check your work at each step.
* Safety: Always disconnect the negative battery cable before starting any electrical work.
* Photography: Take lots of pictures as you disassemble the system. This will be incredibly helpful during reassembly.
If you're not comfortable working on your vehicle's electrical system or interior, it's best to take it to a qualified mechanic. Improper repair could cause further damage or even create safety hazards.
