I have a 1998 Chevy Blazer 4x4 Automatic with a 4.3 Liter Engine and Vin: W. I serviced the transmission by changing the transmission oil and the filter because it was extremely dirty. After I put everything back together the truck would not go back in park unless you manually push the linkage. It goes in every other gear just fine and drives fine, but won't shift back to park by the gear lever. What is the problem? Please Help me. GOD BLESS!!!!!!!

 

Sounds like you altered the adjustment somehow. Search for "transmission+linkage+adjustment" with an author of "swartlkk" and you should find a link to an F-body forum which will run through the adjustment procedure. It works the same way on these trucks.