my GMC Sierra T1XX (2019-Present) remote start not working what’s the issue

GMC Sierra T1XX (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

539 words

Problem Statement

Learn how to diagnose and fix remote start issues in GMC Sierra T1XX (2019-present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems to prevent shocks or shorts.

Symptoms

•Remote start button on the key fob has no effect.
•Engine does not start or crank when attempting remote start.
•"Remote Start Disabled" message may appear on the dashboard.
•Lock/unlock functions work on the key fob, indicating power is present.
•Possible check engine light illuminated.

Diagnostic Steps

1
Check key fob battery and replace if necessary.
2
Scan for error codes using OBD-II scanner.
3
Verify system settings through the infotainment system to ensure remote start is enabled.
4
Inspect vehicle security system for features preventing remote start.
5
Test remote start functionality ensuring all doors are closed.
6
Check for software updates that may affect remote start functionality.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Small flathead screwdriver

Parts Required

•Key fob battery (CR2032 or as specified)

Related Faults

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Diagnostic Steps

1
Check key fob battery and replace if necessary.
2
Scan for error codes using OBD-II scanner.
3
Verify system settings through the infotainment system to ensure remote start is enabled.
4
Inspect vehicle security system for features preventing remote start.
5
Test remote start functionality ensuring all doors are closed.
6
Check for software updates that may affect remote start functionality.

Solution

1. Preparation

Ensure the vehicle is parked safely and on flat ground.
Disconnect the negative terminal of the battery to avoid any electrical issues during repair.

2. Replace Key Fob Battery

Tools Required: Small flathead screwdriver, replacement battery (CR2032 or as specified).
Use the flathead screwdriver to gently pry open the key fob casing.
Remove the old battery and replace it with the new one, ensuring the correct polarity.
Snap the key fob casing back together.

3. Check Vehicle Settings

Reconnect the battery terminal.
Start the vehicle and navigate to the settings menu on the infotainment system.
Locate the remote start settings and ensure that the feature is enabled.

4. Inspect Security Features

Check that all doors and the hood are securely closed.
Ensure the vehicle is in park mode and not in gear; this is a common safety feature preventing remote start.

5. Update Software

If a software update is available, connect the vehicle to a Wi-Fi network through the infotainment system.
Follow prompts to download and install any relevant updates that could affect the remote start system.