2007-2013 Chevrolet Impala Headlight Dimmer & Multifunction Switch Guide
If your high beams turn on with your signals or your headlights won't switch, your multifunction switch is the likely problem.
- The 'dimmer switch' is part of the complete multifunction switch assembly on the steering column.
- A classic sign of failure on this Impala is the high beams activating with the turn signal due to an internal short.
- Replacement is a simple DIY job that does not require removing the steering wheel or airbag.
- Verify your replacement matches OEM part number 15289426 to ensure correct function.
Understanding the Multifunction Switch
When you need to replace the headlight dimmer switch on your 2007-2013 Impala, you are actually shopping for the entire multifunction switch assembly. This is the lever mounted on the left side of your steering column. Internal electrical contacts wear out over time, causing strange lighting problems. A very common failure on this Impala is an internal short that causes the high beams to flash on when you use a turn signal.
Symptoms of a Failing Headlight Dimmer Switch
A bad multifunction switch can cause several issues. You might notice one or more of these problems:
- High Beams with Turn Signal: The most reported issue for this Impala is the high beams turning on by themselves when you activate the right turn signal.
- No High or Low Beam Control: You may be stuck on low beams and unable to switch to high beams, or vice-versa.
- Turn Signals Don't Work: The turn signals may stop working entirely. A key clue is that your emergency hazard lights still work, because they use a different circuit in the switch.
- Wiper Problems: If your switch also controls the wipers, you may lose certain speeds or the ability to turn them on or off.
- Intermittent Operation: Sometimes, jiggling the switch stalk might make the lights or signals work temporarily.
Ignition Switch Recall vs. Multifunction Switch Failure
There was a major safety recall (NHTSA 14V355000) for the ignition switch in these Impalas, which could cause the car to shut off while driving. This is a separate part from the multifunction switch. If your car is stalling, the ignition switch recall may be the cause. Problems with headlights and turn signals alone point to the multifunction switch.
Choosing the Right Aftermarket Part
For the 2007-2013 Impala, you have a choice between different tiers of aftermarket brands. The original GM part is made by AC Delco.
- Premium Aftermarket (Standard Ignition): Standard Motor Products (SMP), sold under the brand name Standard Ignition, is a well-respected manufacturer known for producing parts that meet or exceed original quality. Technicians often trust this brand for its durability and reliable performance, making it a solid choice if you want a long-lasting repair.
- Standard / Value (Skyward): Skyward is a more budget-focused brand. While it will restore function, there is little public information available about its long-term quality or manufacturing standards compared to established brands like Standard Ignition. This brand can be a good choice if your primary concern is the initial cost.
Pro Tip: Before ordering, confirm the OEM part number on your original switch if possible. The most common part number for this Impala is 15289426. This ensures you get an exact match.
Estimated Replacement Costs
| Part Type | Estimated Cost |
|---|---|
| New OEM (AC Delco) | $82 - $100 |
| New Aftermarket | $81 - $95 |
| Shop Labor | $80 - $120 |
Frequently Asked Questions
Can I replace the multifunction switch myself?
Yes, this is a very DIY-friendly job. The steering wheel and airbag do not need to be removed. The process involves removing the plastic covers around the steering column, unplugging a few connectors, and unscrewing the old switch. Most people with basic hand tools can complete this repair in under an hour.
Why do my high beams turn on with my turn signal?
This specific problem is very common on the 2007-2013 Impala and is caused by a short circuit inside the multifunction switch assembly. The electrical pathways for the turn signal and high beams cross, and as the internal components wear down, they make unintended contact. Replacing the switch is the only fix.
Is there a recall for the headlight dimmer switch?
No, there are no recalls specifically for the multifunction (dimmer) switch. There is a well-known recall for the ignition switch, which is a different part that can cause the engine to stall. Problems with headlights or turn signals alone are not covered by a recall.
Why do my hazard lights work but my turn signals don't?
This is a classic symptom of a failed multifunction switch. The turn signals are activated by the stalk, while the hazard lights are activated by a separate button and circuit. When the stalk's internal contacts fail, the signals stop working, but the hazard function remains operational.
Technical Specifications
OEM Part Numbers: 15289426
Controls turn signals, headlight high/low beams, and flash-to-pass. May also include windshield wiper controls. Mounts to the left side of the steering column.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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