If it's the factory alarm:
* Key Fob: The most common way is with the factory key fob. Try pressing the lock button several times. If this is the case, your owner's manual (if you have it) would be the definitive guide.
* Key in the Ignition: In some cases, inserting the key into the ignition and turning it to the "ON" position (without starting the engine) might disarm the factory alarm.
* Alarm Siren: If the alarm is actively sounding, the siren location (under the hood, near the battery or elsewhere) will vary, and there might be a physical switch near it. This is less common on factory systems.
If it's an aftermarket alarm:
This is much trickier as there's no standard way. The method depends entirely on the brand and model of the aftermarket alarm system. The possibilities include:
* Keypad: Many aftermarket systems have a keypad somewhere on the dash or near the door. You might need to enter a code. Check for a small keypad with buttons.
* Key Fob: Similar to the factory system, an aftermarket key fob is common, but the button combinations might differ.
* Hidden Switches: Some systems might have hidden switches located somewhere inconspicuous. This would require finding the switch.
* Shock Sensor: A very sensitive shock sensor could be triggering it. Try gently rocking the vehicle to see if this calms it down.
Troubleshooting and Finding Clues:
1. Listen carefully: Does the alarm make any distinct sounds or sequences? This might indicate the brand.
2. Look for labels: Inspect the wiring under the dash or near the steering column for any labels that might indicate the alarm system's brand or model.
3. Check the owner's manual: Even if it's not the original manual, try searching online for the manual corresponding to your Suburban's year. The factory alarm system instructions *might* be included.
4. Look for a sticker: Sometimes there's a sticker on the inside of the driver's side door jamb, showing the details of the security system.
5. Professional help: If you can't find any information, a locksmith or car audio installer specializing in alarm systems should be able to identify and disarm the system.
Remember to be careful when working with car alarms and wiring. If you're unsure about anything, seek professional help to avoid damaging your vehicle's electrical system.