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Thread: 1997 GMC Sonoma ECM Problem

  1. #1
    Join Date
    Nov 2007

    Question 1997 GMC Sonoma ECM Problem

    1997 GMC Sonoma 4.3L Engine Code(X) 2wd.

    I think the ECM is bad and I called the dealer because I was told the ECM could be reprogramed and that might fix the problem. The problem being it simply won't start..I'm getting fuel..I'm getting spark... Somethings wrong.

    Does anyone know of anywere else I could get the ECM checked out or reprogramed????????

  2. #2
    Join Date
    Oct 2007


    Hi stevemwayne,

    Have you checked trouble codes? You'll find a trouble code list in Haynes manual #24071. When you get the manual and check trouble codes, contact us at: [email]research@haynes.com[/email].

    Thank you for your interest in Haynes manuals!

  3. #3
    Join Date
    Jan 2007


    stevemwayne - You can only reprogram your ECM (VCM) if you have access to the GM Techline terminal and equipment.

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