Hi I have a 1999 Chevy Suburban 5.7 liter. My Suburban's security light came on one day and stayed on for about a month it went off for a couple of days and came back on. One day i went to the gas station it started for about 3 minutes and cut off and it would not start again. I got a used ECM and hooked it up to my truck that one was bad so i rehooked mine, the truck still wouldn't start but the Security light is off and when i try to start it just keep spinning please help.
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