Check your ground wire.
I’m happy to help further over the phone at https://www.6ya.com/expert/karl_14766549451f8563
SOURCE: 1998 lumina, does not start up with key ignition
Is your security light flashing ?if so you have a problem with the anti theft system.Leave the key on for 10 minutes ,then try this should reset the anti theft system
SOURCE: 2001 Chevy Impala won't start
If the battery has gone dead, it could cause the security system to go into full lock-up mode. If it has locked up the accessories will work after the battery is charged back up , but the power to the starter will be cut off and it wont turn over. You need to do the 30 minute learn procedure. A GM dealer will print it out for you and you can do it yourself. It's very simple if you follow the procedure exact. hope this helps and good luck.
SOURCE: 1999 chevy lumina will not start
If you crank the engine with the headlights on and the lights do not go dim there is no current going to the starter. This could be;
SOURCE: Theft lock 2005 Cobalt
If the BCM has been replaced, the BCM has to be reprogrammed by a dealer as it control many car functions.
SOURCE: Same issue no radio,windows, locks but dash board electric works
Try unhooking the battery, turn key on, leave door open, then connect battery, start engine immediately. The battery saver module thinks it's saving your power!!
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