Well for starters, I and everyone reading your post from the globalists, Feds, and on down will be disappointed to hear you lost your SIG in a recent boating accident, many miles off shore, in very deep water.
However if you were to hypothetically get another firearm which you might be reluctant to announce publicly on the WWW, you might consider a high quality handgun safe, such as the Fort Knox PB1.
Keep in mind that most car safes are very vulnerable to quick prying open with a screw driver, much less a crowbar. So you need one at least 10 gauge or thicker to help thwart such attempts.
You must also secure the safe to more than just flimsy interior components, otherwise your safe and gun will both disappear with the thief free to take his time at home to open it up.
With the above said, many people will instead find a place to put their firearm not commonly looked for by a thief, whether it be under a rear passenger seat, the compartment of the jack, etc.
But if you are getting your CC, then you and it will be safer with you, than leaving it in the car/truck.
Still for those times you might need to securely store it since you are going into a sporting event, federal building, school/university, etc. then a good hiding place or gun safe might well be a good alternate.