GM will soon launch a new twin-turbocharged V6.

General Motors' vault appears to have a major crack in the wall as yet another leaked document has revealed the Detroit automaker's future plans.

We've already learned of a LS7-power Chevrolet Camaro for the 2014 model year via a leaked document, and now comes word of a new forced-induction engine.

Listed under the codename LF3, GM describes the new mill as, "ENGINE GAS, 6 CYL, 3.6L, SIDI, DOHC, VVT, ALUM, TWIN TURBO". Unfortunately, no other information was listed, including power output and where the new engine might show up.

Although some reports have suggested that the LF3 will develop 355 horsepower, we have a hard time believing GM would go through the trouble of adding two turbos to its 3.6L for a rather piddly 30-horsepower gain. We'd put our money on the LF3 boasting something closer to the 400 horsepower mark.

We'd like to see the LF3 under the hood of several GM cars, but where it will actually land is a different matter. The hotly-anticipated Cadillac ATS-V is certainly one possibility for the twin-turbo V6, which would give Caddy's latest sports sedan the kind of oomph necessary to take on the BMW M3. It is also possible that Cadillac could use the LF3 in a mid-level CTS model, which would put the mid-sizer of par with V8 offerings from BMW and Mercedes-Benz.

Of course it's hard to dismiss the LF3 as an answer to Ford's EcoBoost F-150. Ford has seen tremendous demand for its twin-turbo truck, with GM likely itching for a similar powertrain of its own. GM's all-new 2014 pickup truck range doesn't include the new twin-turbo V6, but that doesn't mean the automaker couldn't add it to the mix in a year or two.

Hopefully we won't have to wait that long for GM to officially spill the beans.