how to fix GMC Sierra T1XX (2019-Present) issues with the remote start feature?

GMC Sierra T1XX (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

536 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or short circuits.

Symptoms

•Remote start button on the key fob does not respond
•Engine does not start when remote start is activated
•Check engine light may be illuminated
•Door locks may not engage or disengage when attempting to remote start
•Vehicle may start briefly and then shut off

Diagnostic Steps

1
Verify that the key fob battery is functional by testing other buttons on the fob.
2
Check for any error codes using an OBD-II scanner to identify potential issues.
3
Inspect the vehicle’s battery voltage to ensure it is within operational range.
4
Confirm that all doors, hood, and trunk are closed properly, as remote start will not engage if any doors are ajar.
5
Examine the settings in the vehicle's infotainment system to ensure remote start is enabled.
6
Inspect the vehicle’s fuse box for a blown fuse related to the remote start system.

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
•Fuse puller or pliers

Parts Required

•CR2032 battery (for key fob)
•Replacement fuses (if applicable)

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Diagnostic Steps

1
Verify that the key fob battery is functional by testing other buttons on the fob.
2
Check for any error codes using an OBD-II scanner to identify potential issues.
3
Inspect the vehicle’s battery voltage to ensure it is within operational range.
4
Confirm that all doors, hood, and trunk are closed properly, as remote start will not engage if any doors are ajar.
5
Examine the settings in the vehicle's infotainment system to ensure remote start is enabled.
6
Inspect the vehicle’s fuse box for a blown fuse related to the remote start system.

Solution

1. Preparation

Ensure the vehicle is parked in a safe location.
Gather necessary tools and replacement parts.
Disconnect the negative battery cable to prevent any electrical shorts.

2. Inspect and Replace Key Fob Battery

Remove the back cover of the key fob using a small flathead screwdriver.
Replace the old battery with a new CR2032 type battery, ensuring the positive side faces the correct direction.
Reassemble the key fob and test the remote start functionality.

3. Check and Replace Fuses

Locate the fuse box under the dashboard or in the engine bay.
Identify the fuse related to the remote start (refer to the vehicle’s manual).
Use a fuse puller or pliers to remove the fuse and inspect it for continuity.
Replace any blown fuses with the same amperage rating.

4. Verify Settings in Infotainment System

Turn on the vehicle and navigate to the settings menu on the infotainment display.
Select "Remote Start" options and confirm that the feature is enabled.
Adjust any necessary settings (e.g., duration of remote start).

5. Reconnect Battery and Test

Reconnect the negative battery cable securely.
Test the remote start feature to ensure it is functioning properly.