my GMC Sierra T1XX (2019-Present) key fob not working, how can I fix it?

GMC Sierra T1XX (2019-Present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

471 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob for GMC Sierra T1XX (2019-present). Step-by-step guide with diagnostic and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in a safe, stationary position and turned off before proceeding.

Symptoms

•Key fob buttons are unresponsive
•Vehicle does not respond to key fob signals
•Check engine light may illuminate
•Physical key may not turn in the ignition
•Reduced range of key fob operation

Diagnostic Steps

1
Replace the key fob battery with a new one to rule out battery failure.
2
Check for physical damage to the key fob casing or buttons.
3
Use an OBD-II scanner to check for any relevant error codes.
4
Attempt to reprogram the key fob using the vehicle's onboard systems.
5
Inspect the vehicle's receiver module for faults or disconnections.

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

•Flathead screwdriver
•Small Phillips screwdriver
•OBD-II scanner

Parts Required

•CR2032 battery

Related Faults

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Diagnostic Steps

1
Replace the key fob battery with a new one to rule out battery failure.
2
Check for physical damage to the key fob casing or buttons.
3
Use an OBD-II scanner to check for any relevant error codes.
4
Attempt to reprogram the key fob using the vehicle's onboard systems.
5
Inspect the vehicle's receiver module for faults or disconnections.

Solution

1. Preparation

Tools Required: Flathead screwdriver, small Phillips screwdriver, new CR2032 battery (or applicable type)
Safety Warnings: Ensure the vehicle is in a safe, stationary position and turned off before proceeding.

2. Replace Key Fob Battery

Locate the small slot on the edge of the key fob.
Use a flathead screwdriver to gently pry open the fob casing.
Carefully remove the old battery, taking note of the orientation.
Insert the new battery in the same orientation as the old one.
Snap the key fob casing back together until it clicks securely.

3. Reprogram Key Fob (if necessary)

Sit inside the vehicle and close all doors.
Insert the key into the ignition and turn to the "On" position (do not start).
Press and hold the "Lock" button on the key fob for approximately 20 seconds.
Turn the ignition off and then back to "On" again.
Repeat the process for any additional key fobs that need programming.

4. Inspect Receiver Module

Access the vehicle’s receiver module, typically located under the dashboard or near the fuse box.
Check for any loose connections or damaged wiring.
If necessary, reconnect any loose wires or replace the module if damage is found.