Why does my gmc have two batteries

The switch keeps the battery protected from total discharge when running lights or other accessories for a period of time. Dual batteries sets Project Bedrock up to handle any electrical need we might encounter in the field.

It should work nicely on your Chevy or GMC as well. DB Link dblink. The ports in the terminal are designed to lock stripped cable ends in place with Allen set screws.

No crimping necessary. Fast and convenient. Having a set of jumper cables that can be plugged in quickly is a nice item to have on a pickup. This gives us a quick-connect plug-in point at the winch mount for jumpers in case someone else runs their battery down. The ultra-flexible cables have heavy-duty plugs, and they come with a nifty LED light to show the cables are hooked up correctly at both ends.

From buying research to owner support, join 1. What is purpose of auxilary battery on a gas motor, and how do I get to headlamp bulbs since the aux battery and windshield res are right there blocking where you replace bulbs? Sounds like you just have one with odd ball options. That is strange and it is kinda useless to have the dual bats without the plow prep. I changed the low beam headlight bulb on mine recently. I do not have a second battery. I was able to twist my arm around enough to get the old bulb out and the new one in without needing to remove the washer fluid reservoir.

This battery is isolated. That means it is only connected to the main battery when the truck is on. This allows it to charge but not to drain the main battery. It is very usefull if you have a high power sound system and listen without the truck running. It is usefull if you run an inverter for your laptop or power tools. It is used most with trailers.

If you have a camper you can run your lights, refridge, etc. If you have a trailer package it is wired to the 7 pin connector already. I have a watt inverter hooked to mine with v outlets at the rear of the bed. I can operate my miter box and planer and still start the truck at the end of the work day.

An isolated battery running in parallel is a great option period. I've already begun the process of adding one in mine by installing the 2nd battery tray. Thank you very much for that explanation. I just bought a Sierra HD with the Duramax and it came with the two batteries.

The only thing I heard second hand was that the diesel needed two batteries to start it. May I presume everything you said is true about my setup? I always order my trucks with the auxiliary battery option, that way you will never get stranded with a dead battery. I did not know that about the dual battery setup, learn something every day. These trucks aren't just built for snow plows or sound systems - there's alot of hay bale beds that use a similar hydralic system that a plow uses that requare second battery.

Some beds actually come with a spot built into them to add an extra battery if your truck doesn't already have it. Not sure what is meant by isolated. Its still sharing alternator with primary battery, right?

Also, how does plow package option differ? In comparison, the Silverado 5. Regardless of where you look, the consistent reviews are that the Toyota Tundra is one of the most reliable trucks on the market. In and , the Tundra won the J. Power Quality award and the J. Power Dependability award, respectively, earning a score of 88 out of for quality and reliability both years.

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The best engine option for this model is the 5.