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  1. Jump Starter Relay, Starts then Dies. Can't Start Otherwise.

    Problems and Service
    This will be long, but please bear with me. My son's 2007 Cobalt LT 2.2 blew its head head gasket, got hot, junked engine. Found a complete donor car, 2006 Cobalt. I know that the engines are different but replaced the engine, all harness's and computers from donor car. OBD says no...
  2. No Crank/no Start

    Problems and Service
    Weird electrical problem: With ignition in crank position there is 12 volts going to starter signal wire as long as it is unplugged from starter but shows 0 volts if plugged into starter? This is actually on a 2008 Pontiac G5 but should be same setup as cobalt here