Would like to lower the idle slightly on my LT-1 and see what appears to be an adjustment at the T/Body.
Is it as simple as that?

It's sitting about 800-900 rpms and seems a tad high to me.

Thanks,
Colin.

Hey Collin

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Yes it is that easy. Torx head (can't remember the size) small inserted from the windshield side turn counter clockwise. This will lower RPM and not effect the ECM

Thanks gentlemen -- I'll give it a try tomorrow.

Colin.

Let us know how this works out for you 

I've been doing a little reading on the subject and apparently any adjustment at the throttle body is tied in with adjustments and the TPS and ECM ..... My adjustment screw at the TPS has a plug in it and the skinny is that one should not remove it and make any adjustment there without reading and adjusting the TPS ..

So it looks like I should leave it alone for now.

I must first make sure the engine is warmed sufficiently to allow the idle to settle properly and then measure the voltage at the TPS.
Another source of fast idle is a stuck throttle plate which should be exposed and cleaned with carb cleaner.

I'll let you all know how I make out.

Cheers, and thanks for the help,
 Colin.