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Why 1996 GMC sierra 2500 have 2 battery?

Anonymous

∙ 14y ago

Updated: 10/22/2022

Chevrolet and GMC trucks with diesel motors have a lot of electrical draw; glowplugs and such; that the standard battery is insufficient. Rather than develop a speciality monster battery, GM chose to install two batteries in parallel - doubling the capacity. They did the same in the diesel Oldsmobiles.

People with gas motor trucks who want extra reserve capacity truck, like for a winch, killer stereo or just bragging rights; will install the extra battery tray, battery, cables, etc.

I can see that emergency and/or service vehicles might have a second battery option.

I personally worked on a GMC Jimmy that was a U.S.Army truck that had been surplused to my state's Department of Natural Resources. It have a 24 volt charging/starting system - as do all Military equipment I have seen - and it had two batteries in series to produce the 24volt storage.

Wiki User

∙ 14y ago

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