Question about 2004 Chevrolet TrailBlazer

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Without warning or indication of a previous problem, suddenly the transmission would NOT grab! I Turned the ignition off, waited a few minutes, then started-up again. Transmission seemed to "Re-Boot", at first, then did the same thing again, and again! Fearing that I May Ruin the transmission if I continued the ridiculous process, I pulled into an auto-parts store, Bought EVERYTHING I SAW For Transmission Repair, and Proceeded to Drop the Pan, Change the Filter, Replace the Fluid, etc... IT DID NOT HELP AT ALL! Vehicle Continues to Have the same problem! Transmission Seems to work FINE at Start-Up, Then Begins Slipping Random-Gears, or Not Shifting AT ALL! A Mechanic Hooked-Up a Diagnostic and said the "Computer" is NOT Communicating with the Transmission, and my Fuse-Box was found to be EXTREMELY CORRODED! I Can NOT Afford a new Fuse-Panel or Transmission! Is there ANY On-Line, Step-By-Step Guide to Cleaning, De-Oxidizing, or even Replacing the fuse-panel? ...Is this even a "Rational" Explanation of the source of the Problem?

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  • scottiepoo Jan 21, 2009

    Thank You for your response!
    Not sure what or where or what the "Processor" is, and also REALLY hoping the computer is NOT Fried! ...Money is Money, and I haven't found ANY "Valid" Give-a-Ways for that yet! (Broke!)
    I've Already spent over $300.00 just doing whatever I Could figure-out how to do, and getting my fluid "Flushed"!
    One Website mentioned something about a "Modulator" or "Sensor" going bad Being a COMMON-PROBLEM with this Year & Make, and re-assured that as long as the FLUID has Remained "Between-the-Lines", There was most-likely Little, or NO Transmission Damage!
    ...That would be NICE!
    Please tell Me, How Can I Find a Free Online Diagram of these "Sensors", the Fusebox, or a simple Fix-It Manual?


  • scottiepoo Jan 21, 2009

    That is Exactly the "Code" That Came-Up on the mechanic's diagnostic!

    This gives me HOPE!!!!

    ...Unfortunately it Does NOT Give me a "Ride" to the Auto-Parts Store,
    and I am Afraid to drive my ONLY Car any Further in this condition!

    I NEED to Clean Whatever I Can dismantle and Clean tonight! (In the NC. Snow, ...Yay!!)

    I Simply Don't-Know What I Should Clean, or Where it is!

    Thanx So Much for your time & help, I REALLY APPRECIATE it!

    -Blessings 2U!



    -Scott

  • yadayada
    yadayada May 11, 2010

    processor is the computer, common name for part is PCM, Power train control module, that is where the problem may lye.

  • yadayada
    yadayada May 11, 2010

    on modern electronic trans there is seldom any waring, this is the most common complaint, u would be wise to replace the fuse panel before the trans is toast. does the Processor have power?

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It appears to me the problem lies with the computer not communicationg with the transmission so i would start there and work forward,get another computer and put in see if that doesent change anything .on the fuse panel you can take a small fire bruch and clean the connections for the fuses.

Posted on Jan 20, 2009

  • Ronnie Houston Jan 21, 2009

    you can buy a chiltons manual at autozone or any auto parts store.the book willtell you just about anything you need to know and then some,,,thats the only repair manual i know of that might help you out

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