If your parking brake isn't working correctly, the problem is likely one of these:
* Low brake fluid: Check your brake fluid level in the master cylinder reservoir. Low fluid could indicate a leak somewhere in the braking system, including the parking brake.
* Worn brake shoes: The parking brake uses the rear brake shoes. If they're worn, they won't provide enough grip. This requires professional replacement.
* Internal mechanism failure: The parking brake mechanism inside the rear drums could be malfunctioning. This also requires professional repair.
* Cable issue (less likely): While the system is primarily drum-based, there might be a very short cable involved. A broken or severely frayed cable is possible but less common than the other issues.
* Parking brake actuator problem (rare): Some issues could relate to an electric motor or solenoid involved in engaging the parking brake, but this is less likely without other symptoms.
What to do if your parking brake isn't working:
1. Check the brake fluid level: This is the easiest and first step. Add fluid only if it's low; low fluid indicates a leak, which needs immediate attention.
2. Test the parking brake: Make sure it's engaging properly. Hold the pedal down firmly and try to roll the vehicle.
3. Have it inspected by a mechanic: This is crucial. Diagnosing and repairing parking brake issues in a vehicle like the Escalade EXT often requires specialized tools and knowledge. Attempting to fix this yourself could lead to further damage. The mechanic will properly diagnose the cause and recommend the correct repair.
Do not attempt to disassemble the rear brake drums yourself unless you have significant experience working on brakes and have the necessary tools. Incorrectly working on the brakes can be extremely dangerous.
