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Reload Thread: H/O Alternator on GM Impala

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    talentx's Avatar
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    H/O Alternator on GM Impala

    Is there something I must attach to the impala to control voltage after adding a new H/O alternator? I have read about others attaching a charger to their new alternator to keep the voltage consistent. As of now, with new battery, BIG 3, and 270amp alternator I am still getting drops in voltage... and only because the voltage being regulated is too low with my stereo. I know the car is trying to keep my voltage at a certain factory level and is hindering my alternator.







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    slvrado28z is offline CarAudio.com Elite



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    Re: H/O Alternator on GM Impala

    what brand alt is it



    2008 Silverado crew cab
    dash - Pioneer avh-p3200
    Front & rear - sq pa mids and tweets
    Amps - 2 dd m2a straped
    Subs - 4 15" dd 2515
    box- pwk 4th order blowthru

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    talentx's Avatar
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    Re: H/O Alternator on GM Impala

    DC Power XP Alternator 280 amps. Supposed to hold 140 amps at idle. Which is why I cant understand why lights still dim and voltage is changing from 13.2 - 14.1.
    I would expect it to stay at 14.1 easily...




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