My shitbox, I replaced my alternator just for my window motor to go bad, I replaced the window motor just for the thermostat to go bad the next day, it’s inevitable.
Reviews of GENERAL MOTORS alternator
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I will always vote for a 10SI or 12SI GM alternator swap on an L-series engine. Affordable conversion bracket. 1-wire GM alternators are simple, reliable, cheap and readily available online but not easy to find in parts stores. 3 wire GM alternators are are easy enough to wire up and are absolutely everywhere in parts stores if you’re more concerned about parts availability and potential breakdowns on long adventures.
Pros: simple, reliable, cheap, readily available
Cons: 1-wire not easy to find
The OEM alternator is only 55 amps and costs nearly $400, which is stupid expensive and wholly inadequate for off-road lighting, audio amplifiers, and other additional accessories so I decided to go with the CS130D GM alternator, purchased for under $100 new (no core charge) and has a 130 amp capacity.
I'm getting 14.8v from the upgraded alternator at 700rpm and maintaining 14.2v when every possible accessory and light is turned on at idle.
Pros: 130 amp capacity, under $100
Cons: OEM is expensive, inadequate
The alternator itself can get bad only if the bearings are shot. If you don't have play on the shaft, and it spins freely then the alternating part of the alternator is fine. What can get pretty bad are the diode rectifier bridge.
Pros: spins freely
Cons: bearings shot
If you have the V6 4.3 it's one of the more dependable motors GM ever made. The factory alt is rated at 105 amps. Should be enough for your needs.
Pros: dependable motor, enough amps
three alternators in a Cadillac, even "new GM" are remans, only way to get a new one (never installed, made of new parts, new for you) is to buy a new car.
Cons: multiple failures, poor reliability
Had an appetite for alternators, as they put it behind the rear cylinder head and tried to keep it cool with some little rubber/plastic air duct. Failboat. We sold the car with its third alternator, each failure attributed to failure of the rear bearings.
Cons: failure of rear bearings
Mileage: 140000 km
Oh yeah and it went through 2 maybe 3 alternators in the 13 years we had it lol.
Cons: alternators failed often
My mom had a 93 Lumina Euro sedan with the 3.8. The only real serious issue it had was a failed alternator which drained the battery and almost left me stranded one night because the headlights dimmed to the point of being unusable. Other than that, yes the alignment was poor and it had some bad brake wear and warping of the rotors.
Cons: poor alignment, bad brake wear
Vehicle:
Chevrolet Lumina
Triumph TR7. You're a bunch of amateurs. I'm a British car guy in general but the Wedge was exactly as bad as advertised. When it couldn't keep a battery charged I converted it to a GM alternator, then the radiator fell out. A previous owner had pop-riveted a license plate over a hole in the floor. Keeping the carbs synched is a black art. The seat frame snapped as I went down the road - I later found out that it had been hose-clamped together by a previous owner. It didn't catch fire as many times as my Spitfire has, but at least the Spit is fun to drive. The headlights didn't just pop up out of sync, they popped up and *turned on* on their own.
I've also owned a Hyundai Pony and it was a Toyota Cressida next to the Wedge.
Cons: radiator fell out, carbs unsynched
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What we know about GENERAL MOTORS alternator
The brand is registered in USA. Official website: https://www.gm.com/.
In March 2026, PartReview users have a mixed opinion of GENERAL MOTORS alternator.
PR Score — 50 out of 100, based on 11 reviews and 34 votes. 5 positive reviews, 1 neutral review, 5 negative reviews. Average rating — 3 (out of 5). Vote balance: 17 up, 17 down.
In the ranking of the best alternator this part is at position 16, behind OEM Audi and OEM KIA , but ahead of OEM Mazda and Duralast.
Users also evaluated the qualities of GENERAL MOTORS alternator:
- Warning light - battery light appears on the dashboard - rated ambivalently. 2.8 points out of 5.
- Lights - headlights flicker or dim at idle - rated positively. 3.6 points out of 5.
- Noise - whine or chirp from the alternator area - rated negatively. 1.2 point out of 5.
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In particular, see which alternator are better: Mitsuboshi or GENERAL MOTORS, OEM KIA or GENERAL MOTORS, GENERAL MOTORS or Duralast, OEM Nissan or GENERAL MOTORS, OEM BMW or GENERAL MOTORS .