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 Mark Your Own Question

Mark, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 847
Experience:  34+ yrs Dealership Exp. - Fully State & ASE Certified - GM Master & GM World Class Tech
Type Your Cadillac Question Here...
Mark is online now
A new question is answered every 9 seconds

I have a 2002 Deville and it wont start.

Customer Question

I have a 2002 Deville and it wont start.
Submitted: 4 years ago.
Category: Cadillac
Expert:  Mark replied 4 years ago.
Greetings, my name is Mark.

I will do my best to help you. Please do not accept my answer unless you can leave positive feedback. It is important to me that I have helped you and you are satisfied with my answer. I don't know if you are a tech or just a person who is attempting to repair their own vehicle. I only know as much about your issue as you have told me on your post. My answers will be based on the amount of information I am reading. Try to give me as much detail as you can, so we can accurately solve your problem.

When you say .. "it won't start"....does that mean it cranks over and won't run, or .... when you turn the key, nothing happens?
Customer: replied 4 years ago.
turn the key
Customer: replied 4 years ago.
Mark are you there.?
Expert:  Mark replied 4 years ago.
Hello back......

Turning the key and nothing happens?

Do you have battery power?
Do the lights work?
Does the horn blow?
Customer: replied 4 years ago.
I have 13.4 volts
Horn works
Lights are working and brite
Expert:  Mark replied 4 years ago.
So if our battery is good, and yet when you turn the key, nothing happens, you either have a "security" issue, a communication issue with one or more of the modules, or the starter motor issue. Does that sound logical to you?

There is no doubt that you will have trouble codes stored. At this point, you will need to find access to a code reader or some sort of diagnostic scanner. It does no good to try and guess your issue and start putting on parts that are not needed.

Your starter motor is underneath the intake manifold. I have seen these fail, but not as often as a module, key programming, or some other security issue.

You should take your car to a repair facility that you trust and get it properly diagnosed. Or if you can get your codes read, I can be more informed to direct you to a path of repair. However, any module or security issue that is addressed, will need to be programmed through GM.

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:

  • 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
< Previous | Next >
  • 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
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

Meet The Experts:

  • Dave Nova

    Cadillac Technician

    Satisfied Customers:

    ASE Master Certification. GM World Class Certification
< Last | Next >
  • Dave Nova's Avatar

    Dave Nova

    Cadillac Technician

    Satisfied Customers:

    ASE Master Certification. GM World Class Certification
  • Jerry Newton's Avatar

    Jerry Newton

    Cadillac Technician

    Satisfied Customers:

    ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
  • Pete's Avatar


    Cadillac Technician

    Satisfied Customers:

    17 years Cadillac experience as a technician.
  • Gm Tech (Cam)'s Avatar

    Gm Tech (Cam)

    Cadillac Mechanic

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
  • John's Avatar


    ASE Certified Technician

    Satisfied Customers:

  • George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    ASE Master Tech 15+ Years
  • Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Cadillac Technician

    Satisfied Customers:

    GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.