my 1998 automatic chevy silverado's gear shift gets stuck in park quite often. I notice the problem to occur more often when the weather is hot. At times the gear shift can get stuck for 10 mins until I get off and push the truck back and forth and for some rare reason itbecomes unstuck. Not sure what the problem is, please help, thanx.

 

my guess is the park pin inside the trans is worn. it will wear like a back cut and cause it to pull itself harder into park if theres pressure on it. that ones gonna need internal trans work to be repaired most likely.

 

I'd be looking at the ignition switch if I were you. The switches are known to have poor connections internally and I have seen them cause a no shift condition before