how to troubleshoot power windows not working on GMC Sierra T1XX (2019-Present)?

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

563 words

Problem Statement

Learn how to troubleshoot and fix power windows not working on GMC Sierra T1XX (2019-Present). Step-by-step guide with diagnostic steps and solutions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or shorts.

Symptoms

•Power window switches do not respond when pressed
•No audible sound from window motors when attempting to operate
•Windows may be partially or fully stuck in their positions
•Other electrical components (e.g., interior lights) may also be malfunctioning
•Driver's side master switch may be unresponsive while passenger switches are functional

Diagnostic Steps

1
Inspect the fuse box for blown fuses related to the power windows.
2
Use an OBD-II scanner to check for any related fault codes.
3
Test the power window switch operation using a multimeter to ensure it is functioning correctly.
4
Check the wiring harness for any visible damage or loose connections.
5
Inspect the window motors by applying direct power to see if they operate.
6
Verify the battery voltage to ensure it is sufficient for operation.

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
•Screwdrivers (flat and Phillips)
•Fuse puller

Parts Required

•Replacement fuses
•Window switch (if faulty)
•Window motor (if faulty)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Symptoms

•Power window switches do not respond when pressed

•No audible sound from window motors when attempting to operate

•Windows may be partially or fully stuck in their positions

•Other electrical components (e.g., interior lights) may also be malfunctioning

•Driver's side master switch may be unresponsive while passenger switches are functional

Diagnostic Steps

1
Inspect the fuse box for blown fuses related to the power windows.
2
Use an OBD-II scanner to check for any related fault codes.
3
Test the power window switch operation using a multimeter to ensure it is functioning correctly.
4
Check the wiring harness for any visible damage or loose connections.
5
Inspect the window motors by applying direct power to see if they operate.
6
Verify the battery voltage to ensure it is sufficient for operation.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative terminal of the battery to ensure safety while working on the electrical system.

2. Check and Replace Fuses

Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the fuse for the power windows (refer to the owner’s manual).
Remove the fuse using a fuse puller or pliers.
Inspect the fuse; if blown, replace it with a new fuse of the same amperage.

3. Test Window Switches

Reconnect the battery.
Use a multimeter to check the voltage at the power window switch.
- Set the multimeter to DC voltage.
- Place the positive lead on one terminal of the switch and the negative on a ground point.
If there is no voltage, replace the switch. If voltage is present, proceed to the next step.

4. Inspect Wiring

Remove the door panel to access the wiring harness.
Visually inspect the wiring for any signs of wear, fraying, or disconnection.
Use a multimeter to check for continuity in the wiring.
Repair or replace any damaged wires.

5. Test the Window Motor

Disconnect the window motor connector.
Use jumper wires to connect the motor directly to the battery (positive to positive and negative to negative).
If the motor operates, the issue may be in the wiring or switch assembly. If it does not operate, replace the window motor.