A Guide to Replacing the Alternator on Your 1983-1989 Chevrolet Caprice
Keep your classic Caprice running strong by choosing the right new aftermarket alternator for its needs.
- Verify if your Caprice uses a V-belt or a serpentine belt system before ordering.
- Check the amperage of your original alternator; stock units range from 78 to 105 amps.
- Consider a high-output alternator from a brand like Powermaster only if you have added modern electronics.
- Always disconnect the battery before starting the replacement and check related fuses.
Is Your Caprice Alternator Failing?
An alternator problem on a 1980s Caprice can mimic other issues, like a bad battery. Before you replace any parts, watch for these common symptoms of a failing alternator. Often, you'll notice more than one at a time.
🎬 Watch: See these common bad alternator symptoms in action.- Dimming or Flickering Lights: Headlights and dash lights that dim at idle and brighten when you rev the engine are a classic sign of a weak alternator.
- Battery Warning Light: A 'BATT,' 'ALT,' or battery-shaped icon on your dashboard indicates a problem with the charging system.
- Weak or Dead Battery: If your battery keeps dying, the alternator may not be recharging it properly. This can also lead to slow engine cranking.
- Whining or Grinding Noises: A high-pitched whine that changes with engine RPM can point to a bad alternator diode, while a grinding or growling noise often means worn-out internal bearings.
- Electrical Problems: Slow power windows or a radio that cuts out are signs the alternator can't provide consistent voltage to your car's accessories.
Check Your Fuses First
Some late-80s Caprice models have a 20-amp fuse in the fuse block specifically for the alternator. If this fuse blows, the alternator will not charge the battery. Always check this fuse before replacing the entire unit.
🎬 Watch: A fast and simple way to test your alternator.Choosing the Right Aftermarket Alternator
Since new original equipment (OEM) alternators for this generation of Caprice are no longer made, the market consists of new and remanufactured aftermarket parts. Quality can vary, but many aftermarket brands meet or exceed original specifications. They generally fall into three tiers.
Tier 1: OEM-Equivalent Brands
These brands are known for providing parts that fit and function just like the original. They are a reliable choice for a standard daily driver without heavy electrical demands.
- ACDelco: As General Motors' own parts brand, ACDelco is the closest you can get to the original part. They offer different quality levels, with their Gold (Professional) line being the top-tier choice for reliability.
- Bosch: A highly respected German manufacturer of automotive components. Bosch alternators are well-engineered and considered a high-quality replacement, on par with ACDelco.
Tier 2: Performance & High-Output Brands
If you've added electrical accessories like a powerful stereo system, auxiliary lighting, or electric cooling fans, a high-output alternator is a smart upgrade. Stock alternators for this era were not designed for modern electrical loads.
- Powermaster: A brand that specializes in high-performance starters and alternators for classic and muscle cars. They offer units that can produce significantly more amperage at idle and at speed than stock, ensuring your upgraded systems get the power they need.
- Proform: Often associated with performance engine parts, Proform also offers alternators that can provide higher-than-stock output for street performance applications.
Tier 3: Standard & Value Brands
These brands offer a cost-effective solution for getting your Caprice back on the road. They are typically remanufactured units that are tested to meet original specifications and are a perfectly acceptable choice for a stock vehicle.
- Remy: A long-standing brand with a history in heavy-duty applications, offering durable remanufactured alternators.
- BBB Industries, MPA, WAI Global: These are major suppliers in the aftermarket that provide a wide range of new and remanufactured alternators offering good value.
Verify Your Amperage and Belt Type!
The 1983-1989 Caprice used several different alternators. Stock amperage could be 78, 94, or 105 amps depending on the engine and options package. Additionally, earlier models used a V-belt system, while later models switched to a single serpentine belt. You MUST confirm your car's original amperage and belt system to ensure you order the correct part with the right pulley.
Cost of a New Aftermarket Alternator for a 1983-1989 Caprice
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $37.84 - $441.00 |
| Remanufactured Aftermarket | $75 - $150 |
| Used OEM (Junkyard) | $25 - $75 |
| Shop Labor | $100 - $225 |
Frequently Asked Questions
Do I need a high-output alternator?
Only if you have added significant electrical accessories. This includes large audio amplifiers, off-road lighting, electric fans, or other devices that draw more power than the original factory equipment. For a stock vehicle, a standard-output alternator (78-105 amps) is sufficient.
What's the difference between a new and a remanufactured alternator?
A new alternator is made with 100% new components. A remanufactured alternator has been disassembled, cleaned, and had its wearable parts (like bearings and brushes) replaced with new ones before being tested to meet original specifications. A quality remanufactured unit from a reputable brand is a reliable and cost-effective option.
Is it difficult to replace the alternator myself?
For most DIY mechanics, this is a relatively easy job. The alternator is usually accessible from the top of the engine bay. The process involves disconnecting the battery, loosening the drive belt, removing a few bolts and electrical connectors, and then swapping the unit.
🎬 See this walkthrough on how to change a Caprice alternator.Should I replace the belt at the same time?
Yes. Since you already have to remove the drive belt to access the alternator, it is the perfect time to install a new one. Inspect the belt tensioner (on serpentine belt models) for wear as well.
Helpful Videos
Technical Specifications
Amperage: 78A, 94A, 105A (stock, depending on options). Pulley Type: V-Belt or Serpentine (depending on year). Voltage: 12V. Regulator: Internal.
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.
- Chevrolet Caprice:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Caprice Alternator Failing?
- Check Your Fuses First
- Choosing the Right Aftermarket Alternator
- Tier 1: OEM-Equivalent Brands
- Tier 2: Performance & High-Output Brands
- Tier 3: Standard & Value Brands
- Verify Your Amperage and Belt Type!
- Cost of a New Aftermarket Alternator for a 1983-1989 Caprice
- Frequently Asked Questions
- 🎟️ Get 5% Off