From the brand
Product description
BDELI – Better Deliver, Better Deal
Why Alternator Health Matters on GM 4.2L 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 and stability systems
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Cooling fans and HVAC blowers
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Lighting and interior electronics
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AWD and traction control modules
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Charging and maintaining the battery
NOTE: Please check fitment information before purchase
OE/Part Numbers:
- GM: 10464468
- Isuzu: 8104644680
- Delco: 10464468, 15062413, 19151920, 19244750, 10480285, 15162839
- Lester: 8290
- Arrowhead: ADR0307
- J & N Automotive: 400-12179, 400-12179R
- AC-Delco: 321-1828, 321-2127, 334-2527, 334-2527A
- Bosch Remanufactured: AL8805X
When alternator output drops, the battery tries to compensate—briefly—and then fails early. Symptoms include:
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Repeated dead batteries
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Flickering headlights or gauge clusters
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Charging system warnings
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Random electrical glitches
Replacing the alternator fixes the root cause, not the symptom.
Specfictions:
- Voltage: 12
- Amperage: 150
- Rotation: CW
- Regulator/Fan: IR/IF
- Plug Code: 314
- Pulley Class: S6
Why 150 Amps Is the Correct Output
GM equipped these SUVs with high accessory load and long idle time, especially in daily driving and towing scenarios. A 150-amp alternator 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 long-term stress on wiring and modules
Not overkill. Not underpowered. Exactly what these vehicles expect.
Brand-New Construction for Long-Term Reliability
The ADR0307 alternator features:
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High-efficiency copper windings
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Internal voltage regulation for clean, stable output
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Precision-balanced rotor and heavy-duty bearings
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OE-style mounting points and electrical connectors
No reman internals. No mystery wear. Built for real SUV duty.
Why Buy from Pro Street Online?
At Pro Street Online, we sell fixes—not guesses:
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Clear vehicle-specific fitment
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Correct high-output solutions for GM Atlas platforms
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Brand new — not remanufactured
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Built for real-world driving and longevity
If your Trailblazer or Envoy keeps killing batteries or lighting up the dash, this is the fix.
Final Verdict
The ADR0307 150-Amp High-Output Alternator for GM 4.2L SUVs (2002–2005) delivers OE-correct fitment, strong charging performance, and dependable long-term reliability. Install it once and stop chasing electrical gremlins—because these SUVs should run forever, not complain.
Samuel L –
Couldn’t figure out why I had terrible light flickering in my car, installed this and now my electrical problems are solved. Great build quality and easy to afford on a budget.
Morgan Springer –
Great product! Would buy again.
john agner –
Working well. Installed DIY. OEM fit for my 2004 Trailblazer EXT 4×4.
Angela Currington –
It. Works great
James O. –
great fit works great.
Micah Shawn –
Altho I was a bit skeptical about purchasing an auto part on Amazon I’m glad I did!! It was a clean looking alternator that was simple to install. Long lasting part… Quiet. Still the current alternator in my 2004 Chevy Trailblazer. Great price. I definitely got more bang for my Buck!
Someone –
Great quality.My old alternator was going bad and will charge the battery for the first few mins after start up, but then slowly drop voltage until the battery is drained while driving.This fixed the issue and it’s great.
Stuart S –
Do not buy, was defective out of the box. After spenfing my time installing it, it did not work and also ruined my battery, so I have to replace that now as well. Between the cost of a working alternator, battery, time spent installling, removing, installing new alternator and battery. I could sent it to the repair shop and not had these issues. Seller is perfectly happy for me to spend more time returning faulty product to them, but does not want to compensate me for any of my time or ruin battery. Absolutely worst transaction I have ever had on Amazon
Bernard Morales –
chevy trailblazer 2002 alternator
fits well and charge as intended hope it i will last.