Please keep us posted on how it turns out. I want to put fog lights on my LS.You don't need to buy an LTZ bumper, just the two black and chome pc where the factory fog lights go. I know cause I did this with the trim pc and a factory fog light housing. I'm still working on the bulbs, pigtails and the plug connector for the factory dash switch. I'll end up running my own wiring once I get the connectors for both lights and the stock switch.
OMG, this is how bad my eyes are, I thought the LT2 was LTZ, thanks for clearing that up, so I'm guessing I'm missing the plastic chrome circles around the fogsOld thread but still valid.
LTZ comes stock with fog lights. The OP said he had an "LT2" but should have correctly identified it as a "2LT". They don't come stock with fogs.
Easy to retrofit Z fogs to an LS, 1LT, or 2LT. Buy factory fog lights and the trim piece to replace the filler panel. Some cars (if not all) have the wiring standard as part of the loom but the pigtail is tucked up out of the way. Problem with installing the lights is that now you also need the factory switch. Once you get that installed you have to reprogram the BCM to "see" the switch and lights before you can use them.
If you need more info, use Search. It has been discussed many times and even has other options you might find interesting.