Question about 2004 GMC Envoy

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Car shutting off

Replaced battery and ever since car would turn off when you put on heat. Tried fuel injection cleaners and high octane gas. Was okay for about week and then problem resurfaced but now car is running rough and check engine light on also check engine light flashes when I am excelerating. Please help. Car no longer under warranty

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  • klkreation12 Dec 30, 2008

    I will most definitely give this a try. Thank you so much for your assistance.

  • klkreation12 Dec 30, 2008

    thanks for the response but I have another question? Once I write the codes down from the book how can I tell what check engine code is for my car. Sorry I'm a woman and just need further clarification.

  • klkreation12 Dec 31, 2008

    You are the best!!!! I will be sure to refer this site to everyone I know, especially all my female friends.



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Go to AutoZone, borrow the OBDII to check (They will lend it to you for FREE) what the check engine fault code is. Once you have the fault code, you can determine the next steps. Write the fault codes down.and Visit the website =>

to find out what the codes are for quick diagnostic.

Posted on Dec 29, 2008

  • Suzanne
    Suzanne Dec 30, 2008

    The same website has a list of specific codes for certain car manufactures. The is an icon logo for those manufactures. Click on the icon and browse the list of the fault code. If it's there, the code is specific to the manufacture, if not, it's a generic fault code which the regular manual should have information. =>

    You can ask the person working at AutoZone if they can help you look up the fault code. If they are not busy with other customers in line, they are likely to help.



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