The alternator I bought from you doesn't work.

Each alternator is bench-tested before shipping. Apparent failure is usually due to ordering the wrong unit, shipping damage, or installation mistakes. Verify the part number, inspect for damage, and review the proper installation steps (Technical Tip TT-648) before contacting support.

The alternator I bought from you doesn't "put out".

Low-output symptoms are often caused by factors outside the alternator. Measure voltage directly at the rear of the unit with a digital meter; if readings seem low, check the common issues listed below or return the alternator for a free bench test.

High-output alternators ship with an overdrive pulley that may require a belt about 1 inch shorter than stock. Use a quality, oil-free belt to prevent slip and ensure full output.

Regulator plug not plugged in, not seated properly or pinched wire

Make sure the small regulator plug on the alternator is fully seated and oriented correctly. A pinched or missing connection will prevent charging. Self-exciting models (e.g., Fitzall 220A+) do not use this plug.

Battery warning light bulb in dash missing, blown or bad connection

Some vehicles rely on the dash battery-warning bulb to excite the alternator. A blown, missing, or poorly connected bulb can cause a no-charge condition.

Customer changed alternator pulley

Replacing the supplied overdrive pulley with a larger-diameter pulley slows the alternator and decreases charge output.

Vehicle crankshaft pulley diameter too small

Aftermarket under-drive crank pulleys spin accessories more slowly and can severely reduce alternator output. Ensure the crank pulley is at least OEM size.

Main vehicle charge wire too small or not upgraded

Factory charge wiring is sized for OE amperage. When loads rise, upgrade to a heavier-gauge cable such as the Big Zero kit to avoid voltage drop and false low-output symptoms.

Too many grounds, insufficient grounds, or just bad wiring

Improper, corroded, or excessive grounds-as well as undersized or poorly crimped wires-can cripple alternator performance. Have a qualified technician inspect and correct wiring.

Bad, old, weak, damaged or cheap battery

Weak or inexpensive batteries-especially some gel-cell types-may not accept the alternator's current. Use a healthy wet-cell battery with sufficient cold-cranking amps.

Alternator possibly damaged during installation

High-output units contain sensitive electronics. Skipping the recommended battery-disconnect procedure or other steps in Technical Tip TT-648 can damage the regulator and cause no-charge conditions.

The alternator I bought from you doesn't fit.

Direct-fit models require no hardware changes. Universal Fitzall 220A+ units need custom brackets and may require a shorter belt.

Do you sell brackets, spacers or hardware to mount the Fitzall on my particular application?

Due to the vast number of vehicles, PowerBastards does not supply custom mounting hardware. Most customers fabricate brackets themselves or hire a qualified shop.

I tested my alternator and it only makes 30A.

Alternators supply only the amperage the system demands. Clip-on amp meters can be inaccurate; 30 amps may be normal at low load. Send the unit in for a free certified output test if in doubt.

Alternators | Power Bastards

High Output Alternators

Choose Your Make:

Acura
AM General
Audi
BMW
Buick
Cadillac
Chevrolet
Chevrolet Medium/Heavy
Chrysler
Dodge
Dodge Medium/Heavy
Eagle
Fiat
Ford
Ford Medium/Heavy
Freightliner
Genesis
Geo
GMC
GMC Medium/Heavy
Honda
Hummer
Hyundai
Infiniti
Isuzu
Isuzu Medium/Heavy
Jaguar
Jeep
Kia
Land Rover
Lexus
Lincoln
Mazda
Mercedes-Benz
Mercury
Merkur
MINI
Mitsubishi
Nissan
Oldsmobile
Plymouth
Polaris
Pontiac
Porsche
Ram
Ram Medium/Heavy
Saab
Saturn
Scion
Smart Car
Sterling
Subaru
Suzuki
Toyota
Volkswagen
Volvo

View ALL Makes

Home

The following discounts apply to all these products.

Free USPS Ground

320A High Output Alternator for Chevrolet Suburban, 2021 - 2022 6.2L V8 376CID

1 of 4

Product ID 84946606-320-HD1-5

320A High Output Alternator for Chevrolet Suburban, 2021 - 2022 6.2L V8 376CID

320A HD SERIES Direct Fit Alternator for Chevrolet Suburban, 2021 - 2022 6.2L V8 376CID Specifications:

Idle Output: 160+ AMPS
Full Output: 320+ AMPS @ 1200 Engine RPM
Total Output: 320+ AMPS

List Price: $729.00

Price$595.00

320A High Output Alternator for Chevrolet Tahoe, 2021 - 2023 5.3L V8 325CID

1 of 4

Product ID 84946606-320-HD1-6

320A High Output Alternator for Chevrolet Tahoe, 2021 - 2023 5.3L V8 325CID

320A HD SERIES Direct Fit Alternator for Chevrolet Tahoe, 2021 - 2023 5.3L V8 325CID Specifications:

Idle Output: 160+ AMPS
Full Output: 320+ AMPS @ 1200 Engine RPM
Total Output: 320+ AMPS

List Price: $729.00

Price$595.00

320A High Output Alternator for Chevrolet Tahoe, 2021 - 2022 6.2L V8 376CID

1 of 4

Product ID 84946606-320-HD1-7

320A High Output Alternator for Chevrolet Tahoe, 2021 - 2022 6.2L V8 376CID

320A HD SERIES Direct Fit Alternator for Chevrolet Tahoe, 2021 - 2022 6.2L V8 376CID Specifications:

Idle Output: 160+ AMPS
Full Output: 320+ AMPS @ 1200 Engine RPM
Total Output: 320+ AMPS

List Price: $729.00

Price$595.00

320A High Output Alternator for GMC Yukon, 2021 - 2023 5.3L V8 325CID

1 of 4

Product ID 84946606-320-HD1-9

320A High Output Alternator for GMC Yukon, 2021 - 2023 5.3L V8 325CID

320A HD SERIES Direct Fit Alternator for GMC Yukon, 2021 - 2023 5.3L V8 325CID Specifications:

Idle Output: 160+ AMPS
Full Output: 320+ AMPS @ 1200 Engine RPM
Total Output: 320+ AMPS

List Price: $729.00

Price$595.00

250A High Output Alternator for Buick Rainier, 2006 - 2007 4.2L (256c.i.) L6

1 of 4

Product ID 8497-250

250A High Output Alternator for Buick Rainier, 2006 - 2007 4.2L (256c.i.) L6

250A HD SERIES Direct Fit Alternator for Buick Rainier Specifications:

Total Output: 250+ AMPS
Idle Output: 125+ AMPS
Full Output: 250+ AMPS @ 1200 Engine RPM

Powder Coat

List Price: $489.00

Price$395.00

250A High Output Alternator for Saab 9-7X, 2006 - 2007 4.2L (256c.i.) L6

1 of 4

Product ID 8497-250-HD74-1

250A High Output Alternator for Saab 9-7X, 2006 - 2007 4.2L (256c.i.) L6

250A HD SERIES Direct Fit Alternator for Saab 9-7X Specifications:

Total Output: 250+ AMPS
Idle Output: 125+ AMPS
Full Output: 250+ AMPS @ 1200 Engine RPM

Powder Coat

List Price: $489.00

Price$395.00

250A High Output Alternator for Isuzu Ascender, 2006 - 2008 4.2L (256c.i.) L6

1 of 4

Product ID 8497-250-HD74-2

250A High Output Alternator for Isuzu Ascender, 2006 - 2008 4.2L (256c.i.) L6

250A HD SERIES Direct Fit Alternator for Isuzu Ascender Specifications:

Total Output: 250+ AMPS
Idle Output: 125+ AMPS
Full Output: 250+ AMPS @ 1200 Engine RPM

Powder Coat

List Price: $489.00

Price$395.00

250A High Output Alternator for Isuzu Ascender, 2006 4.2L L6 (256c.i.)

1 of 3

Product ID 8497-250-HD99-1

250A High Output Alternator for Isuzu Ascender, 2006 4.2L L6 (256c.i.)

250A HD SERIES Direct Fit Alternator for Isuzu Ascender Specifications:

Total Output: 250+ AMPS
Idle Output: 125+ AMPS
Full Output: 250+ AMPS @ 1200 Engine RPM

Powder Coat

List Price: $489.00

Price$395.00

« Previous...13901391139213931394139513961397139813991400...Next »