Choosing the Right Aftermarket Alternator for Your 1987-1991 Buick LeSabre
Keep your classic LeSabre's electrical system healthy by picking the best new alternator for the job.
- A failing alternator will give clear warnings like dimming lights, whining noises, or a battery light before it leaves you stranded.
- For this vehicle, a new aftermarket alternator from a reputable brand like ACDelco or Bosch is a better choice than a remanufactured unit for long-term reliability.
- Replacing the alternator is a relatively simple DIY job, as it's easily accessible on top of the engine.
- Always check the required amperage for your specific vehicle before buying a replacement to ensure proper charging system function.
Is Your LeSabre's Alternator Failing?
Alternators on older cars like the 1987-1991 LeSabre don't last forever. The average life is around 100,000 to 150,000 miles. When they start to go bad, you'll notice some clear warning signs. Don't ignore them, or you could end up stranded.
Common Failure Symptoms:
🎬 Watch this video to see common bad alternator symptoms.- Dim or Flickering Lights: One of the most common signs is headlights and dashboard lights that dim or flicker, especially at idle. This happens because the alternator isn't producing a steady flow of electricity.
- Whining or Grinding Noises: A high-pitched whine that changes with engine speed often points to a bad bearing or diode inside the alternator. A grinding noise can mean the internal bearings are worn out.
- Battery Warning Light: The 'BATT' or 'GEN' light on your dashboard is a direct signal that there's a problem with the charging system. The alternator is the most likely cause.
- Dead Battery: If your alternator isn't recharging the battery, you'll find yourself with a dead battery, even if the battery itself is new. If you have to jump-start your car frequently, the alternator is a likely suspect.
- Slow or Malfunctioning Accessories: Power windows that move slowly, a radio that cuts out, or other electrical oddities can be caused by the alternator not providing enough power.
OEM vs. Aftermarket Quality
For a vehicle like the 1987-1991 LeSabre, a new aftermarket alternator is a practical choice. Original Equipment (OE) parts from GM are likely no longer available or are very expensive. Aftermarket brands often meet or exceed original specifications. The key is choosing a reputable brand. While some remanufactured parts can be a good value, new aftermarket units generally offer better reliability and avoid issues from reused components.
Choosing the Right Aftermarket Alternator
With several brands available, it can be tough to choose. They are not all created equal. Here’s a breakdown of the brands available for your LeSabre, tiered by general quality and reputation among mechanics.
Tier 1: Trusted OE-Level Quality
- ACDelco: As the original parts supplier for GM, ACDelco is a top choice for a direct-fit, reliable part. Their 'Gold' (Professional) series parts are considered high-quality aftermarket options.
- Bosch: A well-respected name in automotive electrical parts, Bosch alternators are known for good engineering and reliability. They are often a solid alternative to ACDelco.
Tier 2: Reputable Aftermarket Brands
- Remy: Remy has a long history in automotive electrics, once being part of Delco-Remy. While some users report success with their new units, others have experienced premature bearing failures.
- WAI Global: WAI is a large supplier that also makes parts for other brands. Some of their new units come with a test sheet, which is a good sign of quality control. However, some users have reported issues like whining noises or lower-than-advertised amperage output.
Tier 3: Budget-Focused Options
- BBB Industries: This company remanufactures alternators for many store brands, like NAPA. Quality can be inconsistent, 🎬 Learn more about BBB Industries' manufacturing and remanufacturing process. which is a common issue with remanufactured parts in general.
- MPA (Motorcar Parts of America): MPA is a major supplier of remanufactured parts. As with other remanufactured options, quality can vary.
- Proform: This brand is often associated with performance applications and may not be the standard choice for a daily driver replacement.
Pro Tip: Check Your Amperage
LeSabres could be equipped with different alternators from the factory with different amperage ratings (e.g., 105 amps). It is critical to match the amperage of your original part or choose a higher amperage unit if you have added electrical accessories like a large stereo system. Installing an alternator with too low an amperage rating will lead to premature failure.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $77.05 - $322.59 |
| Remanufactured | $70 - $200 |
| Shop Labor | $100 - $200 |
Frequently Asked Questions (FAQ)
Can I install the alternator myself?
Yes, this is a DIY-friendly job for someone with basic mechanical skills. The alternator is located on top of the engine and is easy to access. The basic steps involve disconnecting the battery, removing the serpentine belt, unbolting the old alternator, and then installing the new one in reverse order. You will need a basic socket set and a wrench.
🎬 Follow this step-by-step guide to replace your LeSabre's alternator.Should I replace the serpentine belt at the same time?
Yes, it is highly recommended. The serpentine belt has to be removed to replace the alternator, so it's the perfect time to install a new one for very little extra cost or effort. A worn belt can slip and prevent the new alternator from charging properly.
Are there any recalls for the 1987-1991 LeSabre alternator?
No, searches of the National Highway Traffic Safety Administration (NHTSA) database did not show any recalls specifically for the alternator on 1987-1991 Buick LeSabre models.
What are TSBs and are there any for this alternator?
A Technical Service Bulletin (TSB) is a notice from the manufacturer to dealers about a known issue and a recommended repair. While there were a couple of TSBs for the 1991 model year, none were found to be directly related to alternator failure.
Helpful Videos
Technical Specifications
Varies by model year and factory options. Common amperage ratings include 105 amps. Visually inspect the original part or consult a service manual to confirm the correct amperage and plug configuration before ordering.
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 LeSabre:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your LeSabre's Alternator Failing?
- Common Failure Symptoms:
- OEM vs. Aftermarket Quality
- Choosing the Right Aftermarket Alternator
- Tier 1: Trusted OE-Level Quality
- Tier 2: Reputable Aftermarket Brands
- Tier 3: Budget-Focused Options
- Pro Tip: Check Your Amperage
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off