Grumps,
I know you don't care or would listen to me anyway but my later stage goal in life is to post/update on this forum my K2 with more miles and still operating whether it takes 10yrs or 4 trans in my sled THAN PEPPER! I am gonna see it through!
Anyway, I decided to change out my Vacuum pump recently. I am not even sure your 4.3 has one but I assume it does? I couldn't sleep thinking of having anybody else work on my baby other than me so I opted to do it myself. Did the OEM pump need to come off since I bought it? No, it worked fine as far as I was concerned other than being loud I thought. So after examination it's clear to me as to the main problem with this design. The casted body slightly different has little to no bearing. The internals? Not sure... discarded old unit and obviously didn't open up new unit? The culprit is the Micro-screen and it's so fine inevitably even with 2k OCI with Redline/Amsoil or BOB'S SLICK 0W-20 the screen will restrict from engine combustion byproducts, junk etc. and ultimately fail! I am just giving you a heads up for 130.00 I think I paid....Yes, it's far quieter than original and the new pumps safety screen is literally 100x more open and will not restrict or clog unless you go 100k without changing oil.
So go outside tomorrow scratch the OL' Nutsack and ponder the wisdom I tried to instill? Choice is yours I don't judge! MOOK