Powermaster 485503-17.5 High-Output 245 Amp Denso-Style Alternator Natural 17.5V Preset

The Powermaster 485503-17.5 is a high-output, Denso-style alternator engineered for GM truck and SUV platforms including the Cadillac Escalade and C/K-series trucks. Delivering a peak output of 245 amps, this unit is purpose-built to handle the elevated electrical demands of modern vehicles equipped with aftermarket audio systems, auxiliary lighting, winches, and other high-draw accessories.

Key Features:

• 245 Amp Peak Output — significant upgrade over the factory alternator for high-demand electrical systems
• 17.5V Preset Voltage — fixed voltage regulation optimized for performance charging applications
• Denso Case Style — direct-fit design using OE Denso architecture for straightforward installation
• 3-Inch, 6-Groove Under-Drive Pulley — serpentine belt-compatible under-drive pulley reduces parasitic load
• 2-Pin OE-Style Hookup — plugs directly into the factory wiring harness without modification
• Front-Left Internal Voltage Regulator (FR-L VR) — integrated regulator with Hairpin-style upgrade wiring
• Natural Finish — factory-appearing, corrosion-resistant finish
• Hand-Wound Custom Stator — redesigned stator for improved output and idle performance
• Heavy-Duty Rectifier and Regulator — built for durability under sustained high-output conditions
• Gold-Plated Battery Post — enhanced electrical connection for reduced resistance and better conductivity
• Dyno Tested — each unit includes a Proof of Performance (POP) tag verifying output

Powermaster's HPR (High Performance Replacement) series alternators are designed as a direct bolt-on upgrade, retaining OE mounting points and wiring connections while dramatically increasing charging capacity. The improved airflow baffle over the internal fan provides better thermal management during sustained high-output operation, making this alternator well-suited for towing, off-road, and heavy-accessory builds.