Here's a general outline of the process. This is not a complete, step-by-step guide, and specific procedures may vary slightly depending on your Blazer's configuration. Always consult a repair manual specific to your year and model for detailed instructions and diagrams.
1. Preparation:
* Safety First: Disconnect the negative battery terminal.
* Gather Tools: You'll need basic hand tools (sockets, wrenches, screwdrivers), possibly a scan tool to clear codes after installation, and potentially a torque wrench for tightening bolts to specifications.
* Repair Manual: Obtain a repair manual specific to your 2000 Chevy Blazer. This will provide detailed diagrams, torque specifications, and crucial information about your specific vehicle.
* New TCCM: Make sure you have the correct replacement TCCM for your Blazer. The part number should match the one on your old module.
2. Locating the TCCM:
* The TCCM's location varies slightly depending on the trim level and options of your Blazer. It's usually found near the transfer case itself, often under the vehicle. Your repair manual will show the precise location. You might need to remove some underbody panels for access.
3. Removal:
* Disconnect Electrical Connectors: Carefully disconnect all electrical connectors from the old TCCM. Take photos or make notes to remember their positions for reassembly.
* Remove Mounting Bolts: Unscrew the bolts holding the TCCM in place.
* Remove the TCCM: Gently remove the old TCCM from its mounting location.
4. Installation:
* Install New TCCM: Carefully install the new TCCM into its mounting location.
* Reconnect Electrical Connectors: Reconnect all electrical connectors to the new TCCM, ensuring they're securely seated. Refer to your photos or notes if needed.
* Secure Mounting Bolts: Tighten the mounting bolts to the specifications in your repair manual.
5. Post-Installation:
* Reconnect Battery: Reconnect the negative battery terminal.
* Clear Codes (if necessary): Use a scan tool to clear any diagnostic trouble codes (DTCs) that may have been set due to the old TCCM malfunction. Failure to clear codes can cause the new module to malfunction.
* Test: Test the 4WD system thoroughly to ensure it's functioning correctly in all modes (2WD, 4WD High, 4WD Low).
Important Considerations:
* Electrical System: Working with the vehicle's electrical system can be dangerous. If you're not comfortable with this, seek professional help.
* Torque Specifications: Always tighten bolts to the manufacturer's specifications to prevent damage.
* Repair Manual: A repair manual is essential for this job. It will provide detailed diagrams, torque specifications, and other crucial information.
* Professional Help: If you're unsure about any step of this process, take your Blazer to a qualified mechanic. Improper installation could lead to further damage or injury.
This information is for guidance only. Always consult a repair manual specific to your 2000 Chevy Blazer before attempting this repair. Improper repair can lead to serious damage or injury. If you're not comfortable working on your vehicle, seek professional help.
