Hello everyone I'm the new guy to the forum and a newbie to chevy trucks lol. I have always owned ford trucks and have had good luck with them. But I figured what the hell you only live once. So I traded my 2000 f150 4x4 on 39.5 inch interco superswampers for a 2002 chevy avalanche. I guess I have a couple of questions for everyone. On my title it says my avalanche is a ex police vehicle I snapped a few pics of the interior of the truck. It has what looks to be a antenna on the windshield idk if this has something to do with the on star?. Also my truck has 158000 miles on it is there any preventative maintenance I should do?. And this truck has the 5.3 vortec the truck has been well cared for how long do you think this truck will last me?. I also have a 1965 chevy chevelle 2 door with a numbers matching 283 2 speed powerglide transmission also has original paint. It was my fathers car and he passed away so it was handed down to me so I guess you can call me a ford-chevy guy lol. Sorry for the crooked pictures I'm not sure why there like that or how to fix it.