What causes a clunk when put into gear and a popping sound when you come to a stop on your 1995 k1500?

A clunk when engaging gear and a popping sound when stopping on your 1995 K1500 could indicate issues with the drivetrain, such as worn or damaged universal joints or a failing transmission mount. The clunk might also result from play in the differential or axle components. Additionally, worn suspension bushings or loose components can contribute to these noises. It's advisable to have a mechanic inspect the vehicle to accurately diagnose and address the issue.