Generation III Internal Engine - Oil Pump

what's the most economical upgrade for the shitty 1998 type?

gm part nmb: 17801830 "high volume ls pump" -$73
OR
gm part nmb: 12586665 "ls6 oil pump" -$102

is there that big of a difference between the 2?

Well, IMHO, spend the $145 and get a Melling Oil Pump. I''m a big believer in doing things once. I just did a cam and spring swap. I had no issues with my old 98 pump, but since the cover was off, 70,000 miles was time to do the pump and chain.

At idle at temp. I get 40 psi and under load I am over 60 psi.

An extra $50 is worth peace of mind

i have the ls6 and im getting great oil pressure with the vindicator cam...one of the biggest cams. if u only have 100 bucks it works great. but if u have more money to spend the best one u can get is usually the best way to go. that melling one sounds nice

I also have the LS6 and I get 40 at warm idle typically and WOT have seen 77psi.

I used the ls6 and had good pressure and no issues.

melling is the best choice but it will cost alittle more...i'll spend the extra coin for piece of mind tho

thanks guys

Melling +142358