How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Matt Kesler Your Own Question
Matt Kesler
Matt Kesler , ASE Certified Mechanic
Category: Chevy
Satisfied Customers: 2734
Experience:  ASE Certified - 20+ Years of Experience
Type Your Chevy Question Here...
Matt Kesler is online now
A new question is answered every 9 seconds

03 Monte Carlo: that wont light..dash..battery light

This answer was rated:

I have an '03 Monte Carlo that won't start sometimes I think due to the Pass Lock system. I turn the key, everything in the car comes on but the security light flashes on the dash, the flash alternates with the battery light flash. Usually the car will start after waiting 30 minutes or more. What could this be?

Morgan Davis
It sounds like you have a short in the passlock system. It's failing to read the key properly sometimes and slipping into lock-out mode like it would if the car were potentially being stolen.

The only way to cure this permanently would be to have your local GM dealer service the system. They keep the software proprietary (for obvious security reasons so a random car thief can't connect to the system and steal a car easily) so they are the only ones who can help repair the system to keep it from happening again.

The only procedure for resetting the Passlock I am familiar with (to avoid the 30 minute reboot time) is to turn the key to the ignition position and leave it for 5 minutes. Then turn the key off and wait 5 more minutes. You should then be able to start the car regularly (assuming your malfunctioning Passlock module recognizes the reset procedure like it should).

All this will do is reset it temporarily though and it won't cure the problem permanently. The only way to have it permanently repaired is to have a GM Dealer service the system.
Customer: replied 8 years ago.
That didn't work. Still wouldn't start. It starts now. Same thing happened yesterday. It seems like it started after the weather warmed up. Last night and the night before were the first cool nights we have had here in Nashville.
It sounds like your passlock is malfunctioning. Unfortunately, sometimes when it malfunctions part of the problem is it failing to accept the reset procedure.

The weather could be just enough to trigger it because of the simple expansion and contraction of circuits and connections due to temperature changes.

The security light flashing almost definitely indicates passlock is the root of your problems so you may want to have a GM dealer repair department run some diagnostics. Hopefully, they can just run a hard reboot on the system and reprogram it to operate properly with no hardware replacement.
Matt Kesler, ASE Certified Mechanic
Category: Chevy
Satisfied Customers: 2734
Experience: ASE Certified - 20+ Years of Experience
Matt Kesler and 5 other Chevy Specialists are ready to help you

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Previous | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland

Meet The Experts:

  • GM Tech (Cam)

    GM Tech (Cam)

    Chevy Technician

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
< Last | Next >
  • GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Chevy Technician

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
  • Tim's Auto Repair's Avatar

    Tim's Auto Repair


    Satisfied Customers:

    Have owned a repair shop for 25 yrs.
  • Gary's Avatar


    Chevy Technician

    Satisfied Customers:

    15 years GM master tech
  • Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    ASE Master Certification. GM World Class Certification
  • John's Avatar


    Master A.S.E Automotive technician

    Satisfied Customers:

    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Auto Mech / Electronics

    Satisfied Customers:

    Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
  • Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    18+yrs experience. State Inspector and Chevy Diagnostics