04sierra Posted November 24, 2024 Report Posted November 24, 2024 edit: after more research and watching some youtube videos, looks like only need to run single grounds Will be installing a 400a alternator tomorrow. Was planning on running two 1/0 cables from battery to the alternator. With running two to the alternator, would I also need to run two to each ground? Alt bracket to battery, Alt bracket to frame, Alt bracket to firewall. Vehicle is a 2004 GMC sierra
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