Good luck to you. Its a fairly easy truck to do an install on. HillbillyinOhio has given you some good info, so you shouldn't have any problems. He's been doing it a few years longer than I did, but I've installed more than my share of alarms & starters. I installed professionally for 5 years before I decided to go back to school.

 

i have a 2000 blazer and i am installing a crimestopper 2014 tw2 II fm remote/alarm combo. i got the diagram off of 12 volt.com. and like hillybilly said it doesnt seem complete plus i got diagrams off of other sites and some sites say this year has a third ignition wire and others don't. i also order a DEI 555lw bypass and curious on what i have to splice into to make this work. any advice and or wiring diagrams or colors would be most appreciated. i just dont feel 12volt is a great source to go off of as an only source. any one got an all data wiring diagram laying around