[old Rusty C10]

i know absolutely nothing about sound systems but living in the NYC area i do know something about alarms
Most alarms come with some kind of install guide and as long as ya have some electrical experience anda wiring diagram youll be fine putting it in by yourself, however if there is any problem that arises from the alarm, most times anyone ya bring it to will ty to blame the install ont he problem thus voiding the warranty. In addition you must make sure you properly ground the alarm and make sure you connect it correctly to the circuts or you will kill your battery overnight and the alarm will not work
If you are truly concerned with someone robbing your truck, id conside the pricey but much more effective LOJACK system, but you will not be allowed to install that yourself as that is a GPS kind of system that is activated if your car is stolen the cops follow the signal to your vehicle . It claims a 90% recovery rate and usually with minimal damage to the vehicle. The downside is that you cannot be told where they hide the unit or they void your warranty ( apparently theyre concerned of people that insurance job their vehicles and disconnect the lojack to collect the $5000 offred by lojack) in my area lojak goes for about $895 installed at a new car dealer, but i understand that its only $395 at an authorized dealer
hope that helps