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  1. #1

    Default Service Engine Light And Transmission Issue

    Service Engine Soon light has come on and since the transmission on my 97 Suburban 4X4 doesn't shift into 4th overdrive ? Seems I have gone from 2000rpm at 70mph to about 2000rpm at 65mph since it came on.

    Make any sense to anyone ?

    Thanks - Chris.

  2. #2

    Default

    Quote Originally Posted by cjspga View Post
    Service Engine Soon light has come on and since the transmission on my 97 Suburban 4X4 doesn't shift into 4th overdrive ? Seems I have gone from 2000rpm at 70mph to about 2000rpm at 65mph since it came on.

    Make any sense to anyone ?

    Thanks - Chris.
    Few questions for you Chris (welcome to the site by the way, see you're a "newbie"). Do all the other gears in the transmission work? First and second? You don't just start have third? And you need to hook a scan tool up to it or have a mechanic do it. That way you can have an idea of what may be at fault. Sorry but that's about all I can say without more info...

  3. #3
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    Welcome to the club!!!

    Well since your not able to shift into overdrive, I would say TCC solenoid in the transmission valve body. (Torque convertor control) solenoid. It will not damage the transmission, It will just run at a higher rpm, and your cruise control won't work either.
    2004 Chevy Colorado
    LS1 5.7 swap/TBSS rear axle swap

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