Pizzaguy,
Great news. My top is functioning perfectly. The problem was, the mechanic at the Chevy dealership where I purchased the car, replace the left main lift cylinder and
when he installed it he reversed the wires going to the travel sensors. Klaus recommended that I check these wires and sure enough they were installed backwards.
I want to thank you also for all the advice you have provided for this and many other problems I have experienced.

MCPO