my GMC Sierra T1XX (2019-Present) key fob not working, how to reset it

GMC Sierra T1XX (2019-Present)

Error Codes

30 minutes

Time

easy

Difficulty

medium

Severity

2 min read

390 words

Problem Statement

Learn how to reset the key fob for your GMC Sierra T1XX (2019-Present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is off while working on the key fob to avoid accidental starting.

Symptoms

•Key fob buttons unresponsive
•Vehicle not unlocking or starting with the key fob
•Indicator light on the key fob not illuminating
•Reduced range of the key fob signal
•Intermittent functionality of the key fob

Diagnostic Steps

1
Check the battery level of the key fob and replace if low.
2
Attempt to unlock the vehicle using the physical key blade.
3
Inspect the key fob for physical damage or wear.
4
Verify if other key fobs for the vehicle are functioning properly.
5
Use an OBD-II scanner to check for relevant error codes related to the keyless entry system.

Solution

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

•Flathead screwdriver
•Clean cloth

Parts Required

•CR2032 battery

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the battery level of the key fob and replace if low.
2
Attempt to unlock the vehicle using the physical key blade.
3
Inspect the key fob for physical damage or wear.
4
Verify if other key fobs for the vehicle are functioning properly.
5
Use an OBD-II scanner to check for relevant error codes related to the keyless entry system.

Solution

1. Preparation

Gather tools: flathead screwdriver (for battery replacement), replacement battery (CR2032), and a clean cloth.
Ensure the vehicle is within range and turned off.

2. Battery Replacement

Using a flathead screwdriver, gently pry open the key fob along the seam.
Remove the old battery, noting the orientation.
Insert the new CR2032 battery, ensuring the positive side (+) faces upward.
Snap the key fob halves back together until securely closed.

3. Key Fob Reset/Reprogramming

Sit in the vehicle with all doors closed.
Insert the key into the ignition and turn it to the "ON" position without starting the engine.
Press and hold the "LOCK" button on the key fob for approximately 15 seconds.
Turn the ignition to "OFF" and remove the key.
Test the key fob by attempting to lock and unlock the vehicle.