Car won't shift after sitting overnight

[jpearsall187]

I have a 97 Grand Prix GTP with 182,000 miles. After sitting overnight, the car will not shift out of first until it runs for about 2 minutes. After that, it shift fine. If the car sits during the day for many hours and then I drive it, it shift fine. I am not getting an SES light either. Any recommendations?

[Fivefingerdeathpunch]

Get the car scanned still. Most trans codes dont set the SES off.

You might have a solenoid sticking.

[jpearsall187]

I scanned it and don't get any codes

[FoSHO99]

Could be the checkball?

[jpearsall187]

what is the checkball?

[GTP in RTP]

Check the fluid level ?

[jpearsall187]

Fluid is good.

[BillBoost37]

Could be a multitude of things. Most likely as mentioned there's something not going well until it's warmed up a bit. How often do you typically service the transmission?