Why Alternator Health Matters on GM 3.8L Platforms
Once the engine is running, the alternator becomes the primary electrical power source for:
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ECU, ignition, and fuel delivery
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Automatic transmission controls
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Cooling fans and HVAC blowers
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Power accessories and interior electronics
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Charging and maintaining the battery
When alternator output weakens, the battery tries to compensate—briefly—and then fails early. Common symptoms include:
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Repeated dead batteries
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Flickering headlights or dash lights
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Charging system warnings
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Random electrical gremlins
Replacing the alternator fixes the root cause, not the symptom.
Confirmed Vehicle Fitment
Compatible with the following GM gasoline applications:
Buick
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LeSabre — 2000–2004 — 3.8L V6
Pontiac
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Bonneville — 2000–2004 — 3.8L V6
Electrical Specifications
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Voltage: 12V
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Output: High Output (OEM+ amperage)
⚠️ Always verify engine size before ordering.
Why High Output Makes Sense on Older GM Vehicles
After 20+ years, factory alternators lose efficiency—even if they still “work.” A high-output replacement provides:
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Strong charging at idle
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Stable voltage with accessories running
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Faster battery recovery after starts
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Reduced stress on aging wiring and modules
It’s not about performance upgrades—it’s about restoring reliability.
Replaces OEM Numbers:
8245 8245N 10464439 10480411 25744164 10464439 10464491 25744164 10464439 10480411 10464491 25744164W 10480241 10480411W 10480241W ADR018 ADR0270 400-12150 400-12150R 400-12149 400-12149R 15580009 2-08245 10464421 21781 21799 91601 P8245 13-4804A 134809A 134820A 134804A 213-4804A 213-4820A 8285612 8245612 90-01-4358 8245A AL8775X AL8765X RM1292 RM1380 90-01-4337N
Specifications:
Voltage: 12V; Amperage: 105Amp; Rotation: CW (Clockwise); Regulator: IR (Internal Regulator) ; Fan: IF (Internal Fan); Grooves: S6 Pulley Class; Condition: New
Brand-New Construction for Long-Term Reliability
The ASAPE 8245 alternator features:
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New high-efficiency copper windings
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Internal voltage regulation for clean, stable output
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Precision-balanced rotor and quality bearings
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OE-style mounting points and connectors
No reman internals. No mystery wear. Built to keep your 3800-powered cruiser alive for the long haul.
The ASAPE 8245 High-Output Alternator for Buick LeSabre & Pontiac Bonneville 3.8L (2000–2004) restores stable charging, protects your battery, and keeps GM’s most durable V6 doing what it does best—running forever.
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