radio and no blinker sound and screen went black after jump start
Check ur fuses, I have an 06 hhr and after jumping it blows my power steering so I'm guessing it could be a blown fuse it's a big problem in newer chevy cars after jumping.
If the battery was stone dead, a lot of times you will have to got to the dealer to have the computer system reflashed or a lot of your accessories will not be activated.
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