won't start and security light blinks

Asked by Feb 02, 2017 at 06:43 PM about the 2003 Chevrolet Monte Carlo SS

Question type: General

I replaced the heater core and putting it back together every thing started to
happen

3 Answers

50

Sounds like you need to reprogram your key

1 of 1 people found this helpful.
69,325

If you did not disconnect the negative (-) battery cable before you started working under the dash you may have blown a fuse. If not, try a known working spare key. If you don't have a spare key best to be towed to your local Chevy Dealer for repair. Also, before someone else says it, the 10 minute relearn procedure won't work in your situation. HTH. -Jim

50

He could try the 30 minute at home and if that doesn't work take it to the shop.

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