These say front only. Talked with GM and they said you turn the drivers side upside down since the gaskets are identical. If you lay them both front up the drivers side ends up in the rear blocking the passages so I know the gaskets are correct and I looked at the passages. The original gaskets that came off had the drivers side upside down.

Notice the gaskets both in the up front position. If I were to install them this way you would block the passages on the drivers side rear. One has to be flipped upside down. I even tried the old ones out on my spare block.