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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Will start but not idle when cold. And message center going

Customer Question

Will start but not idle when cold. And message center going from Low Battery to security to low fuel. Also no bright light indicator or tow haul or temp or fuel gauge. No service engine codes
JA: How old is the battery? And have you tested it with a voltmeter?
Customer: Not sure on age but starts truck fine every time
JA: What is the model/year of your Chevy?
Customer: 99 5.3 two wheel drive extended cab
JA: What year is your Cab?
Customer: Cab?
JA: Are you fixing your Cab yourself? What have you tried so far?
Customer: Cab?
JA: Anything else you want the mechanic to know before I connect you?
Customer: Nope
Submitted: 12 days ago.
Category: Chevy
Expert:  AMEDEE replied 12 days ago.

Hello and welcome!

My name isCustomerand I can assist you with your question.

Expert:  AMEDEE replied 12 days ago.

Did you still need help?

Are you looking for possible causes or would you like me to walk you through this diagnoses?

Would you be willing to speak on the phone?

Customer: replied 12 days ago.
Customer: replied 12 days ago.
I've switched the p c m and instrument cluster. Neither is the problem
Expert:  AMEDEE replied 12 days ago.

Thank you for that information.

What is the battery voltage at when this happens?

Customer: replied 12 days ago.
12.5
Expert:  AMEDEE replied 12 days ago.

So the alternator is not charging?

Expert:  AMEDEE replied 12 days ago.

If the alternator is not charging, nothing electrical will function normally on the vehicle. The charging system issue would need to be diagnosed and fixed first before moving on to other things..

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