Will not shift into overdrive

1999 CHEVROLET VENTURE
52,000 MILES • 6 CYL • AUTOMATIC
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RICHARD CC
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It is a 4 speed 1-2-3-d it shifts to third and wont go to overdrive. Which solenoid would I have to change?
Aug 3, 2019 at 10:38 AM
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ASEMASTER6371
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Good afternoon,

Do you have any codes set in the transmission?

https://www.2carpros.com/articles/automatic-transmission-problems

If it was a solenoid, it would code and would need to be verified through testing.

How long since you changed the fluid and filter?

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy
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Aug 4, 2019 at 9:43 AM
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RICHARD CC
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It is my sisters van. I don't think it has been changed.
Aug 4, 2019 at 11:57 AM
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ASEMASTER6371
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I would start there.

Roy
Aug 4, 2019 at 11:58 AM
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RICHARD CC
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Thank you, i will do that.
Aug 4, 2019 at 12:01 PM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Aug 4, 2019 at 12:15 PM