High Output Alternator for Chevrolet Impala (2012-2016) 3.6L
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High-Amp 300A Charging Upgrade for 2012-2016 Chevrolet Impala (W-Body)
What it Does: The 300 Amp High Output Alternator replaces the factory charging unit on the 2012-2016 Chevrolet Impala to deliver sustained, high-amperage current under heavy electrical loads and eliminate system voltage drop.
The Stock Chevrolet Impala Charging Limitations
The factory 150-amp alternator on the W-Body Impala struggles to maintain stable system voltage when auxiliary loads exceed standard operating thresholds. Under continuous electrical draw—such as high-demand aftermarket audio setups, auxiliary cooling, or commercial fleet equipment—the stock stator windings and diode bridge experience severe thermal saturation. This heat soak causes significant voltage sag at idle, stressing the factory battery, causing headlight dimming, and starving the sensitive onboard CAN-bus modules of steady direct current.
The Engineering Solution
Engineered for continuous heavy-duty duty cycles, this 300-amp unit features precision heavy-gauge copper windings and high-temperature avalanche diodes housed within a rigid, ventilated casing to maximize heat dissipation. It yields high output at low engine speeds while resisting thermal breakdown under prolonged engine-bay heat. Built as a bolt-in replacement for OEM reference 104210-6010 and 15136252, it restores full 14.4V charging stability directly to the LFX electrical bus without requiring bracket fabrication.
What's Included
- 1 300 Amp High Output Alternator
Technical Specifications
| Fitment | 2012-2016 Chevrolet Impala |
|---|---|
| Engine / Chassis | LFX 3.6L V6 / W-Body |
| Stock Output | 300 hp / 262 lb-ft |
| Replaces OEM Part # | 104210-6010, AL8833X, 15136252, 11251N, 11251R, 31400-78J10, 11251 |
Compatibility
- 2012-2013 Chevrolet Impala (3.6L V6 LFX)
- 2014-2016 Chevrolet Impala Limited (3.6L V6 LFX)
Frequently Asked Questions & Fitment Warnings
Does this fit the W-Body Impala?
Yes, this is a direct fit for the 2012-2016 Chevrolet Impala equipped with the LFX 3.6L V6 engine.
Is a "Big 3" wiring upgrade required for this alternator?
Installing a 1/0 AWG charging lead and upgraded chassis grounds is strongly recommended to safely deliver 300 amps without overloading factory harnesses.
The Chevrolet Reliability Standard
Ensure reliable high-draw electrical operation and eliminate voltage fluctuations across your vehicle electronics with robust, American-assembled charging hardware.
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