how to fix my GMC Sierra T1XX (2019-Present) remote start not working

GMC Sierra T1XX (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

538 words

Problem Statement

Learn how to diagnose and fix remote start issues in your 2019-Present GMC Sierra T1XX. Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to avoid short circuits.

Symptoms

•Remote start button on the key fob does not respond
•"Remote Start Disabled" message displayed on the dashboard
•Vehicle starts normally using the ignition key
•Battery warning light illuminated on the dashboard
•Key fob battery is low or dead

Diagnostic Steps

1
Check the key fob battery by testing or replacing it.
2
Inspect the vehicle's battery voltage to ensure it is adequately charged.
3
Scan the vehicle's OBD-II system for any trouble codes related to the remote start system.
4
Verify if the vehicle is in an appropriate condition for remote start (e.g., doors closed, hood closed, etc.).
5
Check for any blown fuses related to the remote start feature in the fuse box.
6
Confirm that the remote start feature is enabled in the vehicle's settings.

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

•Small flathead screwdriver
•Multimeter
•Fuse puller or pliers
•Battery charger

Parts Required

•Key fob battery (CR2032)
•Replacement fuses (if needed)

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Diagnostic Steps

1
Check the key fob battery by testing or replacing it.
2
Inspect the vehicle's battery voltage to ensure it is adequately charged.
3
Scan the vehicle's OBD-II system for any trouble codes related to the remote start system.
4
Verify if the vehicle is in an appropriate condition for remote start (e.g., doors closed, hood closed, etc.).
5
Check for any blown fuses related to the remote start feature in the fuse box.
6
Confirm that the remote start feature is enabled in the vehicle's settings.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a safe area and secured.
Disconnect the negative battery cable for safety.

2. Replace Key Fob Battery

Tools Required: Small flathead screwdriver, new key fob battery (CR2032).
Instructions:
1. Use the flathead screwdriver to gently pry open the key fob.
2. Remove the old battery and insert the new battery with the correct polarity.
3. Snap the key fob back together.

3. Check and Charge Vehicle Battery

Tools Required: Multimeter, battery charger (if needed).
Instructions:
1. Use a multimeter to measure the vehicle battery voltage. It should read approximately 12.6 volts or higher.
2. If the voltage is low, charge the battery using a battery charger until fully charged.

4. Inspect and Replace Fuses

Tools Required: Fuse puller or pliers, replacement fuses.
Instructions:
1. Locate the fuse box, typically found under the dashboard or hood.
2. Refer to the fuse diagram to find the fuse related to the remote start feature.
3. Remove the fuse and inspect it for continuity. Replace if blown.

5. Reconnect Battery and Test Remote Start

Tools Required: None (for this step).
Instructions:
1. Reconnect the negative battery cable securely.
2. Ensure all doors and hood are closed.
3. Press the remote start button on the key fob to test the functionality.