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POWERLINE 29HD Series Alternators

These large case alternators are designed and tested to withstand higher under-hood temperatures and are for vehicles requiring higher output at idle and at highway speeds. Tested for today’s medium and heavy-duty on and off-road applications. This series is available only in a 220-amp model.



  • General Motors gas and diesel chassis, shuttle buses, and
    Workhorse trucks. For more application information call HDPSI at (800) 443-9394 or go to
    on the web for details.


  • Weight: 20 lbs.
  • Standard OEM belt can be used in most applications
  • Standard OEM mounting, no brackets needed in most applications


  • 12-month limited warranty


  • Rated 220 amps at 12 volts
  • 5/16” positive output terminal
  • Optimized output wave wound stator
  • Low-loss, high-performance thin lamination stator
  • Heavy-duty, dual-plane balanced rotor
  • Heavy-duty, extended-life bearings with heat-treated races,
    high-temperature grease and Viton seals
  • Heavy-duty, 50-amp press-fit diodes (six positive, six negative)
  • Uses external 10-170 LED diagnostic regulator with
    11-125 harness


  • Extensive heat-chamber testing to withstand the higher
    under-hood temperatures of heavy-duty applications
  • Maximized for highest amps at engine idle
  • Designed for worst-case, high-temperature operating conditions
  • Precision-engineered to guarantee the fit of each application
  • Heavy-duty materials provide exceptional performance
    for extended life
  • Troubleshooting Guide and on-call technical support available
  • Application guide available by phone or online at

POWERLINE 29HD Series Alternator Power Curve Performance

29HD Series, 220-Amp, 12-Volt
Click graph to enlarge.
POWERLINE 29HD Series Alternator Vortec Mount Specifications

29HD Series, Vortec Mount
Click illustration to enlarge.
29HD Series, Vortec Mount
Click illustration to enlarge.
  HD Power Solutions Inc • 4616 Fairlane Ave • Fort Worth, TX 76119 • Phone: (817) 535-0284 • Fax: (817) 531-2755