03 Tahoe oil leak

[Bigtrite]

I’m chasing an oil leak on my Tahoe. It drips about 2-4 drops every night. I thought it was the oil cooler block off plate but now I notice it on the rear oil pan bolts on both sides. It doesn’t look like it’s the pan, I pulled the inspection plate and it doesn’t look like it’s the real main seal. What do you guys think

 

[justirv]

I’m chasing an oil leak on my Tahoe. It drips about 2-4 drops every night. I thought it was the oil cooler block off plate but now I notice it on the rear oil pan bolts on both sides. It doesn’t look like it’s the pan, I pulled the inspection plate and it doesn’t look like it’s the real main seal. What do you guys think View attachment 439669

That oil cooler block off plate is a horrible design, cheap warped metal that I've replaced gaskets on a few times... a billet replacement works well. Good to hear it doesn't appear to be the rear main seal. How many miles on your trans? If neither of these (apparently), it's possible it could be the valve covers at the rear (both of mine leaked simultaneously). Also the oil pressure sensor is up there. Mine's an '02 Z71 for reference.

 

[OR VietVet]

Oil sender, valve cover gaskets, intake manifold or that crap oil cooler block off that needs a billet plate instead, like @justirv said. You can use an oil leak dye and a blacklight.