Coupe hatchback will not open on 1996 Chevrolet Corvette

This mech. works fine until the car is exposed to the Phoenix heat. When left out in 100 an up weather the hatch will not open. When parked in garage or it cools down the Hatch works normally.

Asked by for the 1996 Chevrolet Corvette
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The problem continued to worsen until it stopped working all together. I took it in to the Chevy Dealer service department they installed a new solenoid and now it works fine. Costing me over $300.00 for a $5.00 part....