* The door won't slide at all? This could be due to track issues, roller problems, or binding.
* The door slides but is difficult/jerky? Again, track, rollers, or even the motor itself could be at fault.
* The power sliding mechanism isn't working? This points towards electrical or motor issues.
* The door is partially open and won't close? This might involve a sensor, motor, or the linkage.
Here's a breakdown of troubleshooting and repair steps, assuming you have basic mechanical aptitude and tools:
1. Safety First: Disconnect the negative battery terminal before working on any electrical components.
2. Inspection:
* Visual Inspection: Carefully examine the entire sliding door mechanism. Look for:
* Bent or damaged track: Check the entire length of the track for any bends, rust, or debris.
* Broken or worn rollers: Inspect the rollers at the bottom of the door. They should roll smoothly.
* Damaged linkage: The linkage connects the motor (if applicable) to the door. Look for broken or bent components.
* Obstructions: Anything blocking the door's movement in the track.
* Worn or damaged weatherstripping: This can interfere with smooth operation.
* Testing (if applicable): If the problem is electrical, try testing the motor's power using a multimeter (requires electrical knowledge). Check fuses related to the power sliding door.
3. Cleaning:
* Clean the entire track using a wire brush, degreaser, and shop vacuum to remove debris, dirt, and rust. This often solves minor issues.
4. Common Repairs:
* Track repair/replacement: Minor bends in the track might be repairable with careful manipulation. Severe damage will require track replacement (a specialized part).
* Roller replacement: Worn or broken rollers need replacement. These are usually relatively inexpensive and readily available.
* Linkage repair/replacement: Repair bent or broken parts or replace the entire linkage if necessary.
* Motor repair/replacement: Motor problems require either repair (if possible) or replacement. This is often the most expensive repair.
* Wiring repair/replacement: Check for broken or frayed wires in the door harness.
5. Reassembly:
* After cleaning or repairing components, carefully reassemble the mechanism. Ensure the rollers are correctly seated in the track, and the linkage is properly connected.
Important Considerations:
* Repair Manual: A repair manual specific to your 1999 Chevrolet Suburban is invaluable. It will provide detailed diagrams and procedures. You can find these online or at auto parts stores.
* Parts: Source replacement parts from reputable auto parts stores or a Chevrolet dealer. Ensure you are getting the correct parts for your vehicle's year and model.
* Professional Help: If you are uncomfortable working on the mechanism or if the problem is complex (e.g., motor failure), it's best to take your Suburban to a qualified mechanic specializing in automotive electrical systems.
This detailed outline should help you troubleshoot and potentially repair the issue. Remember to take your time, be methodical, and prioritize safety. If you are unsure about any step, seek professional assistance.
