Hey guys I have an 01 tahoe 2wd. I got a double din pioneer radio and a system for a good price. I unhooked my Kenwood single din that was already installed and wired up the new one. I made sure that I matched all the colors accordingly. During this time my key was on. ( I haven't unhooked the battery, and I heard a spark when hooking it up) I put in the new stereo and it doesn't work. I'm upset because I thought he gave me a bad radio. I hook back up my Kenwood to realize it doesn't work. I then looked at my dash and nothing on my instrument cluster works except for my battery voltage and oil pressure gauge. **Additional Info** I checked all my fuses retaining towards these with a power probe and they were all good. I also just went ahead and replaced them. Also with the tahoe running I'm getting power and ground to the radio. It's just not coming on. If some has a good wiring diagram or can help me out I would really appreciate it. **Note* before all this happened periodically my gauges would act up randomly while driving and if it tapped the top of the dash it would fix itself. That's all I got. Open to any suggestions. Thank you guys