how to fix the remote start feature not working on GMC Sierra T1XX (2019-Present)?

GMC Sierra T1XX (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

564 words

Problem Statement

Learn how to diagnose and fix the remote start feature not working on GMC Sierra T1XX (2019-Present). Step-by-step guide with symptoms 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 shorts.

Symptoms

•Remote start button on key fob is unresponsive
•Check engine light illuminated
•Vehicle does not start when remote start is attempted
•Door locks do not engage when remote start is attempted
•No confirmation lights or sounds from the vehicle when pressing remote start

Diagnostic Steps

1
Verify that the key fob battery is not dead by testing the lock/unlock functions.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the starting system or remote start feature.
3
Inspect the vehicle's battery voltage and ensure it is within the proper range (12.4V - 12.7V).
4
Check the vehicle's settings in the infotainment system to confirm that the remote start feature is enabled.
5
Inspect the hood latch and ensure it is functioning properly; a faulty latch can prevent remote start.
6
Verify that all doors are closed and that no warning lights are illuminated on the dashboard.

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
•Socket set
•Multimeter (optional for battery testing)

Parts Required

•CR2032 battery (if key fob battery is dead)
•Vehicle battery (if replacement is necessary)
•Hood latch assembly (if damaged)

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Diagnostic Steps

1
Verify that the key fob battery is not dead by testing the lock/unlock functions.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the starting system or remote start feature.
3
Inspect the vehicle's battery voltage and ensure it is within the proper range (12.4V - 12.7V).
4
Check the vehicle's settings in the infotainment system to confirm that the remote start feature is enabled.
5
Inspect the hood latch and ensure it is functioning properly; a faulty latch can prevent remote start.
6
Verify that all doors are closed and that no warning lights are illuminated on the dashboard.

Solution

1. Preparation

Gather tools and components needed.
Ensure the vehicle is parked on a flat surface, and the engine is off.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Key Fob Battery

Tools Required: Small flathead screwdriver, CR2032 battery.
Open the key fob using the flathead screwdriver.
Remove the old battery and insert a new CR2032 battery, ensuring correct polarity.
Reassemble the key fob and test the remote start function.

3. Check and Replace Vehicle Battery

Tools Required: Socket set.
Inspect the vehicle battery for corrosion or loose connections.
If the battery voltage is low, charge or replace it.
Reconnect the battery terminals, ensuring they are secure.

4. Enable Remote Start Feature

Start the vehicle and navigate to the infotainment system.
Go to "Settings" > "Vehicle" > "Remote Start" and ensure the feature is activated.
Save the settings and exit.

5. Inspect and Repair Hood Latch

Tools Required: Socket set, lubricant.
Locate the hood latch assembly and inspect for debris or damage.
Lubricate the latch mechanism to ensure smooth operation.
If damaged, replace the hood latch assembly.

6. Check Door Sensors

Inspect all door sensors for functionality.
Test the door locks while attempting the remote start; if they do not engage, repair or replace faulty door sensors.