Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello, its possible you have an issue with the 203 shift solenoid. In the code description below it mentions how it sets for a 4th gear fault. You should drop the transmission pan and inspect for any metal debris or badly burnt fluid. if all checks ok, id replace the solenoid and retest
Hello, do you need more help with this concern?