the lockup solenoid is not a part you can easily change yourself, no matter how mechanically inclined you are.
I'm not an expert on GM transmissions, but I'm almost sure that the lockup solenoid is in the SIDE pan, and not the bottom pan, and is therefore unreachable without taking the trans. out of the car.
There is actually very little you can do to a GM FWD trans. from the bottom pan aside from changing the filter since the valve body is in the side pan!
I might be wrong on this, but I don't think I am
Good luck,
Ben
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