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guage problems

  1. What did I do wrong?

    911 Problems Forum
    ok so just got my Cobalts installed and now my truck is acting up. My idle is constantly up and down, its telling me to service 4wd and my abs light is on. It also doesnt shot of when i turn the ignition on click now. So the key is only turned to have my radio, ac, and stuff on but it stays...