No start replaced entire ignition switch?

Tiny
SAHARRASON
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 78,000 MILES
Replace the ignition switch, program key car won't start. Place old ignition switch chip to new ignition switch, program key, car won't start. Replace entire ignition switch housing unit, reprogram key, car won't start. Security light is still on and car won't start.
Tuesday, May 20th, 2025 AT 11:54 AM

6 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Hello,

So, the security light is on but is it flashing? If it is not flashing (while cranking) the alarm system is not enabled FYI. How does the engine sound while cranking normally? Also does the car have any codes? Please go over this video to help us see what's going on.

https://www.youtube.com/watch?v=lXLJbuAZ4CE&t

I need more information to help you :) Let me know.

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Tuesday, May 20th, 2025 AT 6:30 PM
Tiny
SAHARRASON
  • MEMBER
  • 4 POSTS
When I crank the engine there is no sound. And the security light doesn't flash, it just on.
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Tuesday, May 20th, 2025 AT 10:22 PM
Tiny
SAHARRASON
  • MEMBER
  • 4 POSTS
Could I have a bad PCM?
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Tuesday, May 20th, 2025 AT 10:26 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Maybe, so you're saying the starter motor is not working? Can you please upload a short video of what is happening? In the meantime, here is a video that can help:

https://www.youtube.com/watch?v=6YRW8fyNudY

Please go over this guide and get back to us.
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Thursday, May 22nd, 2025 AT 10:00 AM
Tiny
SAHARRASON
  • MEMBER
  • 4 POSTS
I just replaced the starter. My car is stuck in anti-theft mode. How do I get it out?
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Thursday, May 22nd, 2025 AT 10:26 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Okay, I would do a hard system reboot, please follow this guide to show you how:

https://www.2carpros.com/articles/step-by-step-guide-performing-a-hard-system-reboot-for-your-vehicles-electronics-systems

Please go over this guide and get back to us.

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Friday, May 23rd, 2025 AT 10:47 AM

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