For Police Interceptors or Transit vans, you can enable "Dark Car" mode (turns off all interior lights, parking lights, and dash lights instantly). For civilian vehicles, you can add "Silent Mode" to disable door chimes.
The FORScan Extended License is arguably the best value-for-money modification tool in the automotive hobbyist world. It costs less than a tank of gas but gives Forscan Extended License Key
If you hate subscription mental models or work on cars frequently: For Police Interceptors or Transit vans, you can