I have read several of the threads about this. I am losing about 1/2 qt oil in 4000 miles and the underside of the truck is a mess.
I am pretty comfortable doing my own maintenance and turning a wrench.

Main question is this: Is it worth the extra $$ to get the video with the seal kit or is it pretty easy to figure out without it? Is it a must to mark the alignment of the the drive gear on the vac pump/cam gear side and at the union of the vac and PS pump? Is there an online write up on the repair or a good write up on this site?

 

easy ,I got the Cummins seal for $10 with instructions, save your money

 

I'll pm you my address and you can send me a check for this one I got for free on youtube. It only applies to trucks to 2001 but it should get you in the ball park. Hope it helps.

 

When I did mine I was glad to spend the extra $$ the video was a great boost in confindence.