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Why did I think that those were part of the engine intake?

So are they for cooling or intake purposes?

Thanks in advance.

More later...

Z.
Nothing to do with intake at all. They help direct more airflow to the radiator, A/C condenser, and oil, tranny, and PS coolers.

Me to, I always wince when I see someone has put foglights there.
GM put fog lights in there on Z71 Tahoes. They also painted the bumper to match the body.
 

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Those holes are for a little more air flow to the engine.

Now if GM would have done it up right, a stock intercooler would be a BA option or standard option. Then almost no need for the "Fog Light" holes.
With an intercooler up there, the holes would have to be, in theory, even bigger. It however, would certainly not eliminate the need for them.
 
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