How To Keep Accessory Mode On Gmc

How to Keep Accessory Mode On in Your GMC

Keeping your GMC's accessory mode on can be incredibly useful for various tasks, from running the defroster on a cold morning to powering your phone charger while parked. However, the exact method for maintaining accessory mode varies depending on your GMC model and year. This guide will walk you through several common approaches and troubleshooting tips to help you keep that accessory power flowing.

Understanding Accessory Mode in GMC Vehicles

Accessory mode allows you to use certain vehicle functions – like the radio, lights, and power outlets – even when the engine is off. This is different from running the car, as it doesn't engage the engine or drain the main battery as quickly. It uses a separate power source designed for these accessories. It's crucial to remember that leaving accessory mode on for extended periods will eventually drain your battery, so always be mindful of how long you leave it active.

How to Activate and Maintain Accessory Mode

The methods for activating and maintaining accessory mode can differ across GMC models. Here are some of the most common approaches:

Method 1: The Key (Older Models)

Many older GMC models utilize a simple key-based system. After turning the ignition off, you might be able to leave the key in the "accessory" position. Consult your owner's manual for specifics, as the exact position of the key and how long it remains active will vary.

Method 2: The Push-Button Start (Newer Models)

Newer GMC vehicles with push-button start systems usually require a different approach. Instead of a key position, you may need to press and hold a button or follow a specific sequence. Check your owner's manual, as this varies greatly depending on the model and year. Often, a specific button press combination might allow extending accessory mode for a predetermined time.

Method 3: Utilizing the Infotainment System

Some advanced GMC infotainment systems allow you to manage accessory mode settings directly within the touchscreen interface. Look for options related to power management, accessory settings, or vehicle settings. You might find options to adjust the duration of accessory mode or even automatically activate it under specific conditions. Again, your owner's manual is your best guide here.

Troubleshooting Accessory Mode Issues

If you're having trouble keeping accessory mode on, consider these troubleshooting steps:

• Check your owner's manual: This is the definitive guide for your specific GMC model.
• Battery health: A weak battery might be unable to support accessory mode for very long. Consider having your battery tested.
• Fuses: A blown fuse in the accessory circuit could prevent accessory mode from functioning. Check your fuse box for any blown fuses related to accessories.
• Software glitches: In newer models, a software glitch might be responsible. Try restarting your infotainment system or even the entire vehicle.

Tips for Efficient Accessory Mode Usage

• Don't overuse it: Prolonged use will drain your battery.
• Use it mindfully: Only utilize the accessories you need.
• Regularly check your battery: Ensure it’s in good condition.
• Consider a battery tender: If you frequently use accessory mode, a battery tender can help maintain your battery's charge.

By understanding your specific GMC model's accessory mode functionality and following these tips, you can effectively utilize this convenient feature without risking your battery's health. Remember, always consult your owner's manual for the most accurate and detailed information.