This is nearly a dead give away.

When I changed batteries, I didn't look under the rubber boots. After many long hours I did, and I found a ton of corrosion. So bad that the only way to correct the lean bank issue on my car was to replace all three battery cables with brand new GM cables.

i replace battery cables, spark pluge and wires.
but the check engine light is on

What did you replace the battery cables with? New cables or replaced them back onto the new battery?

You mention the check engine light is still on, what codes are present now that you have done this work?

i replace battery cable with new ones.
new fuel pump and fuel filter
the check engine light is off

Ok, what symptoms do you have left? Hows the car running?

running good
thank you all for the help

it'* amazing what something "simple" like battery and/or cables can cause, ain't it??

You sir are correct, I chased symptoms for 3 months. San Juan Cruiser did the same if not longer.

Both either battery connection or battery cable related.