For those who've done their own leveling kit:
I've done several on my previous vehicles, and a fair amount of front end work in college, but.... I attempted to pop the upper ball joint this week, on my new Silverado, and it wouldn't budge. I used a pair of 3# hammers (one one the left side of the knuckle, the other swung from the right, and vis-versa.) Nothing! Puppy is holding fast!
A friend suggested that the knub on the back side of the knuckle was the appropriate target point... what's your experience?