Dual Battery

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Ok I have seperate battery tray. Can I just hook 2nd battery Neg to Neg and then positive to???? Do I have to buy these "kits"? They aint cheap. I have a 5.7L Vortec V8 350 4wd Yukon SLT 1999. The current battery has a Positive cable that leads to a juction box on fan cowling. Then cable goes out to Alternator and a 2nd cable goes over the fan cowling and across to the auto start. The "junction has another Positive "slot", can I just plug in there? Alternator? Nedd a bigger one? Mine has to be stock.

Reagan in Vancouver WA

Feb 4, 2010

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What are the best GMC repair shops?

RepairPal Certified shops can diagnose and repair your 1999 GMC Yukon. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

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Dual Battery

What is your question?

Reagan in Vancouver WA

Feb 4, 2010

1 Reply

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Bret Bodason Feb 5, 2010

You really should do this one way, the correct way. Get the kit, it's called an isolator, the proper gauge cables and a battery. Doing this incorrectly or on the cheap may cause much bigger problems.

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Popular Answer

What are the best GMC repair shops?

RepairPal Certified shops can diagnose and repair your 1999 GMC Yukon. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.