Ive got the same motor in my 2000 LS. I'll make you a trade...

My water temp works but my oil pressure is always 60+ psi almost maxing out the gauge. I'll take a pic of the water sender tomorrow afternoon (dark out now and cover is in the rig). Would you mind taking a pic of your oil pressure sender under the port exhaust manifold? Should be a two wire situation like your water temp sender...

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