1. Electrical Issues:
* Fuse: Check the fuse box (usually under the hood or in the passenger compartment) for a blown fuse related to the trunk release. Your owner's manual will show you the fuse layout.
* Wiring: A broken or frayed wire in the wiring harness leading to the trunk latch is possible. This is often caused by wear and tear, especially near the hinges where the wiring bends frequently. You'd need to visually inspect the wiring for damage.
* Switch: The trunk release switch (either the button in the car or the key fob) might be faulty. Try the other release method to see if it's the switch.
* Actuator: The electrical motor (actuator) that unlocks the latch itself could be burned out or malfunctioning. This is usually the most common electrical failure.
2. Mechanical Issues:
* Latch Mechanism: The latch mechanism itself might be jammed, broken, or out of adjustment. Something might be obstructing it. This often requires manual intervention (see below).
* Cable: If your trunk release is cable-operated (some older models), the cable could be broken, stretched, or disconnected. This would need visual inspection and repair/replacement.
* Rod: Similar to a cable, a rod could be the culprit.
* Lock Cylinder: If you're using the key to open the trunk, the lock cylinder itself might be broken or worn out.
3. Other Possibilities:
* Central Locking System: If the car's central locking system is malfunctioning, it might affect the trunk release.
* Security System: A malfunctioning alarm or security system could interfere with the trunk release.
Troubleshooting Steps:
1. Check the Fuses: This is the easiest and quickest check.
2. Try All Release Methods: Test the interior trunk release button, the key fob, and the key in the lock cylinder. This helps isolate the problem (e.g., if only the button doesn't work, the problem is likely with the button or its wiring).
3. Manual Access: See if you can gain access to the trunk from inside the car (some models allow this). If you can open the trunk manually, it points toward a problem with the electrical system or the latch mechanism.
4. Visual Inspection: Inspect the wiring harness leading to the trunk latch for any visible damage.
5. Test the Actuator (if accessible): If you can access the actuator, you might be able to test it with a multimeter to see if it's getting power. This usually requires some car repair knowledge.
If you're not comfortable working on your car's electrical system or mechanical parts, it's best to take your Chevrolet Malibu to a qualified mechanic for diagnosis and repair. They have the tools and expertise to accurately pinpoint the problem and fix it safely. Trying to fix it yourself without the proper knowledge could cause further damage.
