2004 Grand Prix won't shift out of first unless uphill

Complete Transmission Repair Cost Guide Transmission Forum – Ask an Expert GMC 2004 Grand Prix won't shift out of first unless uphill

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  • #9916
    zrothum
    Participant

    Being told the 1-2 shift solenoid is bad but once this goes uphill and shifts out of first it will shift fine the whole ride. Stop and go. Thoughts?

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    #9926
    Hostgator
    Member

    If the 1-2 shift solenoid has gone bad there’s nothing you can do but replace it. Of course, if you want to keep on using it, your Grand Prix will continue to act up and still won’t shift. Eventually, since both the solenoids were installed at the factory, at the same time, the 3-4 shift solenoid will also fail and you will be let with an engine that starts up nicely, but the transmission won’t work at all.

    I realize that the 1-2 solenoid may be the one that is inside the valve body so the transmission will have to be partially taken apart to get to the failed part, but, it is the best idea to fix the solenoid since it is very possible — I am not saying it will happen, just that it is possible — you will damage the transmission by relying on third starts and fourth/fifth cruising. Is your tranny shifting into overdrive — fifth?

    That’s my take. It should cost about $800 for labor and parts.

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