how do i check the oil in the supercharger

As far as I know, you cant check them, Awhile ago someone asked the same question.

Yes, this is not something that you check, it's a sealed system.

I think its like turbos and uses the oil of your motor

I don't know why these people bother to answer when they have no idea what they are talking about. Yes you can check it and no, it's not a sealed system. There is a small black plug looking thing about the size of a peanut that is embeded into the gray/siler supercharger itsself. You have to use a hex key/alen wrench  type tool to loosen it. refer to your owners manual for how much oil to add or if it gets low. the problem with removing old oil is that you have to use a baster type thing ( like a small turkey baster type suction) to remove the old oil as thee is no drain plug that I know of. Hope this helps!

That's incorrect. It's uses it's own oil. Turbo's don't use the oil from your "motor" ( engine) either. And supercharges have thier own self contained oil.

And where did you get this inoformation? You can check them, view my post below.

Wow, I can't believe the people answering above you that have no frickin' idea of what they're talking about!  Why
waste our time when they are talking out their ass?

Of course you're right, there is a small hex head plug on the front (towards front of car) that can be taken off.  The
oil should be very close to right up top of the hole.  It takes about 1 3/4 bottles of the GM supercharger oil to fill
from empty. I've read that synthetic oil will also work but I'm not sure I'd risk it.

The center hub rotating assembly houses the shaft which connects the compressor impeller and turbine. It also must contain a bearing system to suspend the shaft, allowing it to rotate at very high speed with minimal friction. For instance, in automotive applications the CHRA typically uses a thrust bearing or ball bearing lubricated by a constant supply of pressurized engine oil. The CHRA may also be considered "water cooled" by having an entry and exit point for engine coolant to be cycled. Water cooled models allow engine coolant to be used to keep the lubricating oil cooler, avoiding possible oil coking from the extreme heat found in the turbine.

Notice in the picture the Oil Inlet/Outlet

This is why after driving hard you should let your car idle for a minute or two so you turbo slows down so it doesn't miss any oil.

hex nut is on right end of the snught looking at engine is right of the sc pully if full you will notice it if low yu have to use super charger oil only.i owne a t-bird SC that is super charged ,i recomedn draining it and using the royal purple sc oil.click my avitor go to pictures and check out the sc is the black one.

here is a picture on a great way on how to remove the old oil of your supercharger. I did a research and indeed superchargers uses its own wich i didn't know but i was right on turbos, maybe there's some with self-contained oil but never seen any

It's a hex bolt just under the plastic cover which is over where the spark plug wires are routed. This cover is toward the passenger side of the engine and it covers an area just inside of the supercharger pulley. You can remove this cover or move it over slightly.... look deep down (you'll need good lighting) and you see this little recessed bolt (this bolt is like a dipstick for the supercharger oil), but be careful it strips easy. It's location is in the owners manual also. If can't find it, I'll fax you a copy of the page... let me know.

That's a turbo.  The Riviera uses a Roots-type supercharger.

I know its just to show to chris and adam that some turbos do use egine oil but in the process of finding info on it i found out that spme turbos actually self-contained. turns out we were both right