Your Guide to the 2011-2017 Buick Regal Alternator
Diagnose charging system problems and choose the right replacement alternator for your Regal.
- For 2012-2013 models, check if your VIN is part of the safety recall for the Generator Control Module (GCM) before buying parts.
- Always test the battery first; a weak battery can show the same symptoms as a bad alternator.
- Replacement is a tight job, especially on the 2.0L Turbo, and requires a serpentine belt tool.
- For best results, choose a new or remanufactured unit from a premium brand like ACDelco, Bosch, or Remy.
Is Your Buick Regal Alternator Failing?
A failing alternator rarely dies without warning. For the 2011-2017 Buick Regal, symptoms often start small and get worse. Before you assume the alternator is bad, always have your battery tested. A weak battery can mimic alternator problems. If the battery is good, look for these common signs of a failing alternator:
🎬 Watch: A breakdown of common symptoms and how to fix them.- Dimming or Flickering Lights: Headlights and interior lights may dim, flicker, or even get brighter as the alternator's voltage output becomes unstable.
- Warning Lights: A battery icon or a message like "Service Battery Charging System" or "Battery Power Save Mode" may appear on your dashboard.
- Electrical Gremlins: You might notice the radio acting up, power windows moving slowly, or other accessories malfunctioning as the alternator struggles to provide enough power.
- Dead Battery: The most obvious sign is a battery that keeps dying. If you can jump-start the car but it dies again shortly after, the alternator is the likely culprit.
- Strange Noises: A whining or grinding sound from the engine bay can indicate that the bearings inside the alternator are failing.
Critical Recall for 2012-2013 eAssist Models
GM issued a safety recall (NHTSA #13136) for certain 2012-2013 Buick Regal models equipped with the eAssist hybrid system. This recall addresses a faulty Generator Control Module (GCM), not a traditional alternator. A failing GCM can cause a gradual loss of battery charge, engine stalling, and in some cases, smoke or fire in the trunk. If you own one of these models, contact a GM dealer with your VIN to see if this critical recall applies to you.
Choosing the Right Aftermarket Alternator
When replacing your Regal's alternator, you have a choice between OEM and a wide range of aftermarket brands. An OEM part is what the car was built with, but a high-quality aftermarket part can offer similar performance for less money. Here’s a breakdown of the brands available:
- Premium Brands (Bosch, ACDelco, Remy): These brands are often original equipment suppliers to automakers, including GM. ACDelco is GM's own parts brand, making it a direct replacement. Bosch and Remy have strong reputations for durability and reliability. Choosing a new unit from one of these brands is your best bet for longevity.
- Standard/Value Brands (WAI Global, BBB Industries, MPA): These brands offer a more budget-friendly option. They are often remanufactured units, meaning an old alternator has been rebuilt with new wear components like bearings and brushes. While they can be a good value, their lifespan can sometimes be less consistent than a premium new part.
New vs. Remanufactured: A new alternator is made with all-new components. A remanufactured (reman) alternator has its case and other durable parts reused, while wearable items are replaced. A quality reman from a top brand like Bosch or ACDelco is a solid choice, but a new unit from the same brand often provides extra peace of mind.
How Much Does a Buick Regal Alternator Replacement Cost?
The total cost depends on the part you choose and shop labor rates. You can save money by doing it yourself, but it's a moderately difficult job.
| Item | Estimated Cost |
|---|---|
| New OEM (GM Genuine) | $350 - $510 |
| New Aftermarket | $70 - $400 |
| Remanufactured Aftermarket | $100 - $300 |
| Shop Labor | $130 - $200 |
| Total Professional Replacement | $550 - $700+ |
Frequently Asked Questions
Can I replace the alternator myself?
Yes, if you have moderate mechanical skill and the right tools. The job is rated as intermediate difficulty, taking 2-4 hours. The space is very tight, especially on the 2.0L Turbo engine, 🎬 See this step-by-step replacement guide for the 2.0L Turbo engine. and requires moving the power steering line. You will absolutely need a serpentine belt tensioner tool.
What is the eAssist Generator Control Module (GCM)?
On 2012-2013 Regal models with the eAssist mild-hybrid system, a Generator Control Module (GCM) is used instead of a traditional alternator. It performs a similar function but is integrated into the hybrid system. These units were subject to a major safety recall for failure.
Should I get a higher amperage alternator?
For most owners, the stock amperage (typically 120A or 150A) is sufficient. An upgrade is only necessary if you have added significant electrical accessories, such as a powerful aftermarket stereo system with amplifiers, extra lighting, or other high-draw equipment.
What is the most common mistake when ordering?
The most common mistakes are ordering the wrong part for your specific engine (2.0L Turbo vs. 2.4L) 🎬 Watch: This walkthrough shows the alternator replacement on a 2.4L engine. and not being aware of the eAssist system in 2012-2013 models, which uses a GCM instead of a standard alternator. Always verify the part fitment for your exact year, model, and engine.
Helpful Videos
Technical Specifications
OEM Part Numbers: 13588324 13592811 22892569
Amperage ratings for the 2011-2017 Buick Regal are typically 120 Amps or 150 Amps, depending on the engine and trim level. The alternator uses a 6-groove pulley.
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.
- Buick Regal: