Tools You'll Need:
* Wrench set (metric): You'll need various sizes, likely including 10mm, 13mm, 15mm, and possibly larger.
* Socket set (metric) with ratchet: Makes working in tight spaces much easier.
* Screwdrivers (Phillips and flathead): For various fasteners.
* Pliers: Needle-nose pliers might be helpful for reaching small parts.
* Jack and jack stands: Essential for safely working under the vehicle.
* Wheel chocks: For added safety.
* New alternator: Make sure you get the correct one for your specific Suburban model and engine.
* Battery terminal cleaner: Recommended for cleaning the terminals after disconnecting the battery.
* Wrench or socket for the battery terminals: Usually 10mm.
* Gloves: Protect your hands.
* Safety Glasses: Protect your eyes from debris.
* Shop Towels or Rags: Keep things clean.
* Optional: Torque wrench: For tightening bolts to the manufacturer's specifications.
Procedure:
1. Disconnect the Battery: Always disconnect the negative (-) battery terminal first, then the positive (+) terminal. This prevents accidental shorts and electrical shocks.
2. Raise and Secure the Vehicle: Safely jack up the Suburban and secure it on jack stands. Never work under a vehicle supported only by a jack. Place wheel chocks on the wheels that remain on the ground.
3. Locate the Alternator: It's usually mounted on the engine, near the front. Its location can vary slightly depending on engine configuration.
4. Disconnect Electrical Connections:
* Disconnect the alternator's electrical connector(s): There will be at least one large connector supplying power and a smaller one for the alternator's indicator light. Carefully unplug these connectors. Some connectors may have locking tabs.
* Disconnect the battery cable(s) from the alternator: This usually involves removing a bolt or nut.
5. Remove the Alternator Mounting Bolts: These bolts are typically located on the alternator's mounting bracket. The number and size of the bolts will vary. You might need to maneuver the wrench or socket in a tight space.
6. Remove the Alternator: Once the bolts are removed, the alternator should be relatively free to remove. It might be a bit snug; you might need to gently wiggle it to free it from its position. Be aware of any pulleys or belts in the vicinity.
7. Install the New Alternator: Reverse the removal steps to install the new alternator. Make sure to align the alternator properly before tightening the mounting bolts.
8. Reconnect Electrical Connections: Carefully reconnect the electrical connectors and battery cables to the new alternator.
9. Lower the Vehicle: Carefully lower the Suburban from the jack stands.
10. Reconnect the Battery: Connect the positive (+) terminal first, then the negative (-) terminal.
11. Test the Alternator: Start the engine and check the charging system voltage using a multimeter. The voltage should be around 13.5-14.5 volts. If not, there may be a problem with the new alternator or another part of the charging system.
Important Considerations:
* Belt Tensioner: You might need to loosen the belt tensioner to remove or install the alternator. This will vary depending on your Suburban's engine and alternator setup.
* Accessibility: Access to the alternator can be challenging. You might need to remove other components (e.g., air cleaner housing, etc.) to gain better access. Consult your repair manual for specific steps.
* Professional Help: If you are not comfortable working on your vehicle, consider taking it to a qualified mechanic. Improperly installing an alternator could damage other components or even result in injury.
This guide is for informational purposes only. Always consult a qualified mechanic or your vehicle's repair manual for specific instructions and safety precautions. Working on a vehicle involves inherent risks. Proceed with caution.
