how to fix my GMC Sierra T1XX (2019-Present) if the radio has no sound

GMC Sierra T1XX (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

507 words

Problem Statement

Learn how to diagnose and fix no sound issues in GMC Sierra T1XX radio. 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

•Always disconnect the battery before working on the electrical system to prevent shock.

Symptoms

•Radio powers on but no sound from speakers
•Volume knob unresponsive or has no effect
•Check engine light illuminated (if related to audio module)
•Bluetooth connectivity issues
•No audio from auxiliary inputs or USB
•Fader and balance adjustments have no impact

Diagnostic Steps

1
Check the audio system settings to ensure the mute function is not activated.
2
Verify that the volume is turned up and not set to zero.
3
Inspect the vehicle's fuses related to the audio system for any blown fuses.
4
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the audio system.
5
Disconnect and reconnect the battery to reset the audio system.
6
Test the speakers individually to ensure they are operational.

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
•Multimeter
•Socket set
•Wire connectors

Parts Required

•Replacement fuses (if blown)
•Wire connectors (if wiring is damaged)

Related Faults

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Diagnostic Steps

1
Check the audio system settings to ensure the mute function is not activated.
2
Verify that the volume is turned up and not set to zero.
3
Inspect the vehicle's fuses related to the audio system for any blown fuses.
4
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the audio system.
5
Disconnect and reconnect the battery to reset the audio system.
6
Test the speakers individually to ensure they are operational.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, and wire connectors.
Ensure the vehicle is parked on a flat surface with the ignition off.
Disconnect the negative battery terminal to avoid electrical shock.

2. Inspect Fuses

Locate the fuse box under the dashboard and the engine compartment.
Use the fuse diagram to identify the audio system fuse.
Remove the fuse using a fuse puller and inspect it for continuity.
Replace any blown fuses with the same amperage rating.

3. Check Wiring Connections

Reconnect the battery terminal.
Remove the radio unit from the dashboard.
Inspect all wiring harnesses for loose connections or damage.
Repair or replace any damaged wires, ensuring secure connections.

4. Test Audio Output

Reconnect the radio unit and power on the vehicle.
Test for sound by cycling through radio stations, Bluetooth, and auxiliary inputs.
If no sound is present, use a multimeter to check the speaker outputs for voltage.

5. Reset Audio System

If the above steps do not resolve the issue, perform a system reset.
Disconnect the battery again for at least 10 minutes.
Reconnect the battery and check if the audio system functions properly.