GM Front Wheel Drive Car Alternators

High output alternators for GM front-wheel-drive cars — Impala and Impala SS, Monte Carlo, Grand Prix, LaCrosse, Lucerne, Century, Bonneville, Cutlass, Grand Am and DTS.

Output from 240 to 320 amps, covering 3.5L, 3.8L, 3.9L and 5.3L applications.

Read the full buying guide

W-body and H-body

These platforms share alternators widely across Chevrolet, Buick, Pontiac, Oldsmobile and Cadillac badges. An Impala, Grand Prix and LaCrosse of the same era can take the same unit, while a 5.3L Impala SS or Monte Carlo SS differs from the V6 cars.

Check your engine size against the individual product listing rather than searching by badge.

Why these owners upgrade

Audio is the dominant case. These cars are plentiful, inexpensive and have large trunks, which makes them popular system platforms. The factory charging setup was specified for stock loads and runs out quickly once amplifiers are added.

The 5.3L Impala SS and Monte Carlo SS are also common performance builds where added electrical demand comes from the engine side rather than the audio side.

Don't skip the wiring

Factory cable on a passenger car is thin and becomes the limit as soon as you fit a high output alternator. Upgrading the alternator-to-battery, battery-to-chassis and engine-to-chassis runs is the highest-value supporting change. See our Big 3 wiring upgrade guide.

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