Most Tahoe PPVs come with auxiliary battery option (Pro Code 6A6, 5W4 or 9C1), which is part of PPV package. Based on GM published electric circuit schematic, auxiliary battery only supplies power to police add-on electric gears which will be installed by an aftermarket upfitter before Tahoe being delivered to police department.
Some utility vans will have auxiliary batteries to power active anti-theft systems. All hybrid and electric vehicles (EVs) have a high-voltage battery to provide drive power to the vehicle, but they also have a 12 volt battery to power everything else.
What is an auxiliary battery?
An auxiliary battery is a smaller battery than the main battery. In most cases, it supplies power to certain electrical components to take some load off the main battery and alternator. The auxiliary battery also operates in a different circuit from the main battery, so it's unlikely that you'll experience drivability problems with your vehicle.
How long do auxiliary batteries last?
The lifespan of an auxiliary battery will depend on the systems it powers and if it's maintained properly during routine maintenance. Our Duracell Ultra auxiliary batteries come with a 3-year warranty but, generally speaking, auxiliary batteries should last around 5 years.
Do new cars have auxiliary batteries?
The more electrical equipment installed in new vehicles, the more strain on the starting battery. Flash forward a few years and auxiliary batteries are still fairly rare but you will now see secondary auxiliary batteries in many cars ranging from Mercedes Benz, BMW, Chrysler, Jeep and more. How Do I Know if My Car Has an Auxiliary Battery?
How much does an auxiliary battery replacement cost?
Some of these parts include the lights, audio system, and start/stop feature (if applicable), among others. An auxiliary battery replacement can cost anywhere between $275 and $320, depending on your vehicle's year, make, and model. The auxiliary battery needs to be taken care of the same way as the main battery.
How does an auxiliary battery work?
When the engine is NOT running or the engine is cranking, the auxiliary battery supplies electric power to its designated loads without charging; when the engine is running, the isolator relay is closed and the the auxiliary battery connects to primary battery parallelly and gets charging.