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Contact ZAutomotive and see what they have to say about it. My only suggestion is to unmarry it, do a firmware update with the computer, and then marry it again.

Try disconnecting the negative cables and separately charging each battery. Usually, the message you are getting indicates the Aux Battery failed the startup test. Maybe check with the dealer and see if there is a warranty on the batteries.

The 'best' fluid is already in it. Stick with OEM fluid for this transmission. That's what it was designed to use. Any other fluid being mixed into the transmission is trouble waiting to happen.

I have the 8.4 NAV on this JT, and the one before it. I regularly get weather alerts, and they are accurate for the area's I'm driving in.

I used this harness from Curt to connect my additional reverse lights. https://a.co/d/dagPolv https://a.co/d/avHN08m

Jscan can be used to enable the Cargo Camera input for the camera.

The JT has a fairly high parasitic draw, especially with the 8.4 head unit. For longer battery life, the maintainer is an unfortunate necessity if the vehicle is not driven enough to keep the batteries charged.

My dealer has an Express Lane for oil changes. I took it in last Monday for my remaining Wave oil change and tire rotation. I was there about an hour.

I bought one several years ago for my 2020 Overland, and transferred it to my 2023 High Altitude in February of 2024.

I think it was around $500, but that was in 2019. I pulled all the pieces and moved it to my new truck in early 2024.

The build date is on the silver label on the door jamb, that is the month and year when it was finished. There is also a MDH on the label, which is the month, day, and hour the build was started.

I'm guessing, from the build date, this was one of the last '23s built, and the feature had already been removed from the assembly line in preparation for the '24 builds to start.

This is my '23 High Altitude, built 10/23.

The transmission paired with the 3.6 V6 is built in a Stellantis factory, not by ZF.

Log in to your account on the Jeep web site. There should be some links there that give you prices for the SiriusXM Guardian Service.

@AllMoparParts.com is a forum sponsor.

The remote button is convenient. It allows you to activate the Boost mode without opening the hood. Since it's not driven regularly, I would suggest the battery maintainer. It will help the battery to last longer. The parasitic draw will be a constant issue.

The Genesis is doing what it is designed to. It keeps the batteries isolated when the engine is off so they both don't discharge. The Boost feature allows you to recover from a discharged Main Battery and get the truck started. It doesn't have the ability to prevent discharge of either battery.

The IBS connects to the negative terminal on the Main Battery. The negative cables connect to the IBS. It monitors flow in and out of the battery. The computer uses data from the IBS to make decisions about charging and alternator output.

Which head unit do you have? The 8.4 Uconnect is a steady parasitic draw. The truck computers never actually turn off. Three years is a long time for the batteries, especially where they have been allowed to regularly discharge. Keeping the batteries charged prolongs their life. If the...