OEM Ignition Switch for 2016-2025 Buick, Chevrolet, & GMC

What to Look For

• Check the part for any visible damage.
• Make sure the connector matches your vehicle's wiring harness.
• Read reviews and ratings from other buyers.

Quality Indicators

What's Included

• Typically, just the ignition switch itself.
• Sometimes, new screws or bolts may be included.

Difficulty Level and Estimated Time

• Difficulty: Medium
• Estimated Time: 1-2 hours

Special Tools Needed

• Screwdrivers
• Socket set
• Pliers
• Steering wheel puller (sometimes needed)

Critical Steps and Tips

1. Disconnect the negative battery cable.
2. Remove the steering wheel trim.
3. Disconnect the electrical connectors from the ignition switch.
4. Remove the old ignition switch.
5. Install the new ignition switch.
6. Reconnect the electrical connectors.
7. Reinstall the steering wheel trim.
8. Reconnect the negative battery cable.

DIY or Professional Installation?

• DIY is possible if you have experience with car repairs.
• Professional installation is recommended if you are not comfortable working on your car's electrical system.

| Option | Description | | Used OEM | Best value. Genuine factory parts, tested and inspected. | Brand new, third-party parts built to OE specs. |

Used OEM: Best Value

• Genuine factory parts, ensuring proper fit and function.
• Tested and inspected to meet quality standards.
• Significantly lower prices compared to new parts.

New Aftermarket

• Brand new, never used.
• Can be a good option if OEM is unavailable or too expensive.
• Quality can vary depending on the manufacturer.

• Ignition Coil
• Spark Plugs
• Starter Motor
• Battery

Replacing these parts at the same time can prevent repeat failures and ensure optimal performance. For example, a weak battery can put extra strain on the ignition switch, causing it to fail prematurely.

• The ignition switch typically lasts 5-10 years or 100,000-150,000 miles.

Factors That Affect Longevity

• Driving conditions
• Quality of the original part
• Regular maintenance

• Used OEM: $50 - $150
• New Aftermarket: $75 - $250
• Labor Cost: $100 - $300 (if professionally installed)
• Total Job Cost Estimate: $150 - $550

• Some models have reported issues with the steering column lock mechanism, which can affect the ignition switch.
• Check for any Technical Service Bulletins (TSBs) related to the ignition switch on your specific vehicle model.

How to Confirm Proper Operation

• Start the car and make sure it starts smoothly.
• Check that all accessories (radio, lights, etc.) are working properly.
• Turn the steering wheel to ensure the steering column lock is functioning correctly.

What to Look/Listen For

• No unusual noises when starting the car.
• No warning lights on the dashboard.
• Smooth and consistent engine performance.

Q: How do I know if it's the ignition switch or the starter that's bad?
A: If you hear a clicking sound when you turn the key, it's more likely the starter. If you don't hear anything, it could be the ignition switch. Testing with a multimeter can help pinpoint the problem.

Q: Can I replace the ignition switch myself?
A: Yes, if you have experience with car repairs and the necessary tools. However, it's important to disconnect the battery and follow the instructions carefully.

Q: What does OEM mean?
A: OEM stands for Original Equipment Manufacturer. It means the part is made by the same company that made the original part for your car.

Q: Is a used OEM part reliable?
A: Yes, used OEM parts are typically reliable because they are genuine factory parts that have been tested and inspected. They offer a good balance of quality and value.

Q: How long will a new ignition switch last?
A: A new ignition switch should last for several years, typically 5-10 years or 100,000-150,000 miles, depending on driving conditions and maintenance.

OEM Part Numbers:

• GM: 39179435, 84647451

Fits Years: 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025