High Output Alternator for Buick Roadmaster (1994-1996) 5.7L

High-Capacity 300A Alternator for 1994-1996 Buick Roadmaster (B-Body)

What it Does: The 300-amp high output alternator replaces the factory charging unit on the 1994-1996 Buick Roadmaster to eliminate idle voltage drop and deliver stable current under heavy auxiliary electrical loads.

The Stock Buick Roadmaster Thermal & Electrical Weakness

Factory B-body platforms utilize stock CS-series alternators rated between 100 and 140 amps. When subjected to continuous demand from dual electric cooling fans, air conditioning compressors, upgraded stereos, or modern electrical conversions, factory units experience heavy thermal soak inside the cramped LT1 engine bay. Excessive heat causes internal bridge rectifiers to degrade, inducing severe voltage sag at idle speeds (below 800 RPM) and premature diode burnout.

The Engineering Solution

This 300-amp unit features precision heavy-gauge copper windings and high-temperature insulation to resist thermal saturation. Engineered with an upgraded heavy-duty internal rectifier, high-amperage avalanche diodes, and efficient rotor balancing, it supplies consistent 14.4-volt power even in low-RPM traffic conditions. Housed in a cast aluminum casing designed for direct bolt-on installation, this unit replaces failure-prone OEM equipment—such as 10463338 and 10480201—without mounting bracket modifications.

What's Included

• 1 x 300-Amp High Output Alternator

Technical Specifications

Compatibility

• 1994 Buick Roadmaster Sedan / Estate Wagon 5.7L V8
• 1995 Buick Roadmaster Sedan / Estate Wagon 5.7L V8
• 1996 Buick Roadmaster Sedan / Estate Wagon 5.7L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the B-Body Roadmaster?

Yes, this is a direct fit for the 1994-1996 Buick Roadmaster equipped with the LT1 5.7L V8 engine.

Do I need to upgrade my main power wiring?

A 1/0 AWG Big Three wiring upgrade is strongly advised to support 300-amp throughput and prevent excessive circuit resistance.

The Buick LT1 Standard

Built to handle high-output demands on GM full-size pushrod V8 platforms, this alternator ensures rock-solid electrical integrity under high thermal and mechanical stress.