I have always been curious about the auxiliary battery that is in my 2001 Chevy Silverado 2500 HD. According to the manual, this battery is for if using a truck camper? That would lead me to believe that if I am not using a truck camper, I dont need this extra battery?When I recently had to replace the batteries, I was told I should replace both?

Diesel? My three Ford diesels all have had 2 batteries, but they are simply wired in parallel to provide the power for starting the diesel engine.

If they are saying that it's for a TC then it must be a dual purpose battery? An automotive battery will die pretty fast if used on an application that discharges it the way we do gc2 and marine/rv batteries. Is it gas or diesel? I haven't seen them all but diesel usually uses two because of cranking amps, grid heater etc.

armyhockeynut wrote:I have always been curious about the auxiliary battery that is in my 2001 Chevy Silverado 2500 HD. According to the manual, this battery is for if using a truck camper? That would lead me to believe that if I am not using a truck camper, I dont need this extra battery?When I recently had to replace the batteries, I was told I should replace both?If it is a desiel then you should replace both, they are paralled and are your starting batteries.If it is a gasser, then it is the auxilary battery that is an option. the aux battery is for a camper, etc.

You didn't say whether you owned a Diesel or gas truck?

If it's a diesel both batteries work together to start the truck. Both are necessary and both should be replaced at the same time. If this is a gas truck then it truly is an auxillary battery and can be treated separately from the starting battery. Or, even removed. I don't know what it powers in this configurations. It may power the radio, 12v outlets, etc. You may want to keep if if you often use those circuits with the engine off.

Chevy Auxillery Battery | Good Sam Community

ktmrfs
Explorer II
Jul 18, 2017
armyhockeynut wrote:
I have always been curious about the auxiliary battery that is in my 2001 Chevy Silverado 2500 HD. According to the manual, this battery is for if using a truck camper? That would lead me to believe that if I am not using a truck camper, I dont need this extra battery?

When I recently had to replace the batteries, I was told I should replace both?

If it is a desiel then you should replace both, they are paralled and are your starting batteries.

If it is a gasser, then it is the auxilary battery that is an option. the aux battery is for a camper, etc.
azrving
Explorer
Jul 18, 2017
If they are saying that it's for a TC then it must be a dual purpose battery? An automotive battery will die pretty fast if used on an application that discharges it the way we do gc2 and marine/rv batteries. Is it gas or diesel? I haven't seen them all but diesel usually uses two because of cranking amps, grid heater etc.
BB_TX
Nomad
Jul 18, 2017
Diesel? My three Ford diesels all have had 2 batteries, but they are simply wired in parallel to provide the power for starting the diesel engine.

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