How to install dual batteries in a truck

[pimpolligist16 10+ year member]

i have a 1997 gmc sierra truck it has dual battery tray's i would like to add an additional batter making it 2 batter's in my truck how do i go about wiring them to run right?

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[k_schutte 10+ year member]

drop the battery in... wire in parallel...

My '66 cadillac had the same thing. Just ground the second battery to the frame and/or other battery. Then a wire from the positive to the alt. and/or other battery...

 

[pimpolligist16 10+ year member]

ight thanks that's what i thought it was but i was just making sure before i blow up