Bad shift solenoid symptoms

SOURCE: Chevy transmission won't shift into 3rd

front clutches bad needs to be rebuilt

SOURCE: 4L60E won't shift to 3rd on 1993 Chevy Blazer

Hello;
It sounds as though your trans is going out. How is reverse? If reverse is real strong then you may just have a solenoid going out. Drop the pan and change the oil and filter if you are comfortable doing that. Inspect the pan for metal shavings and contaminents. Otherwise it would need to go to a shop for repair.
Thanks;
Rich
RPM Northwest

SOURCE: 4L60E won't shift to 3rd on 1993 Chevy Blazer 1500

Sounds like you have a bad shift solenoid. Not sure if the Chevys are a solenoid pack, or seperate, but it will need to be replaced.

SOURCE: my 88 chevy with 700r4 wont upshift from 3rd to 4th

you have a valve body problem, some of the speed sonsor controls are malfunctioning... need to get into the valve body... check fluid condition for dirty and burned condition...

SOURCE: my 88 2500 k pickup not shifting into 3rd or 4th

common problem. It will need rebuild or replacement. They are common tranny's do due this, there are many out there and reasonably priced.