Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Could be a couple of things happening at the same time: Park/Neutral Position Switch and instrument cluster. Try disconnecting and cleaning the PNP switch first - use lots of WD-40. Replace it if it still feels stuck in 3rd gear after cleaning (see attached PDF for instructions).
If replacing the PNP switch fixes the tranny stuck in gear issue, but the cluster still doesn't display the gears, then the most common problems are bad solder joints on the circuit board. If you smack the top of the dash or wiggle the harness going to the back of the cluster and the lights flicker or come back on, then you know it's bad solder joints.
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