Just bought a low mileage 07 LTZ and have a couple questions. First how do you dim the nav screen at night? I can select day or night but no other adjustment is able to made. It is very bright at night and I would like it a little dimmer.
Second, what can I do to improve stereo for cheap? The bose sound system is rather weak, I'm surprised Bose puts their name on it.
Last, I am looking for all weather floor mats and bug deflector any suggestions on where to go?

 

Welcome to the forum.

Without checking for sure, I think the day/nite option is the only choice. There's a separate Nav owner's manual that may have more info.

Probably the least expensive way to improve the sound is to replace the speakers. Try searching the forum for "speakers" and poster "ZX1100F1". He listed the speakers he put in his 2007.

I got a pair of Catch-All mats for winter driving. As far as bug deflectors go, all they do besides looking ugly IMO, is to keep the bugs off of the front edge of the hood. They don't keep them off the W/S.

 

The nav screen will also dim with the rotary button below and to the left of the steering column that will pop out when pushed and dims the instrument cluster.

 

that is what I was thinking is that it would dim with the IP dimmer