The PCV system on GM LYX 1.5L turbo engines really has me stumped. I had done some reading on how the tubing can get brittle and break on these systems, and all the fittings are basically a tamper proof, snap in place, one time use setup. The screws that holds what looks like the PCV valves themselves into the valve cover have tamper proof heads on them even.
While doing some maintenance on my new to me 2021 Equinox with the 1.5T, I took a good look at the one piece PCV hose assembly. The assembly connects to two stubs on the rear of the valve cover, which joins with a single stub on the front of the valve cover, then a single line tees off of this assembly and connects to the rubber boot just upstream of the turbo. Best I can tell, there is no vacuum supplied to this PCV system at all. The system appears to rely on what ever suction it can get from the turbo. All that oily condensation blows through the turbo, through the charge air cooler and into the throttle body. There is a small baffle box near where the system ties into the turbo inlet. I've seen videos where owners report this box full of oil/water. There's no easy way to drain it either. Here's a clip to get an idea of the plumbing.
While doing some maintenance on my new to me 2021 Equinox with the 1.5T, I took a good look at the one piece PCV hose assembly. The assembly connects to two stubs on the rear of the valve cover, which joins with a single stub on the front of the valve cover, then a single line tees off of this assembly and connects to the rubber boot just upstream of the turbo. Best I can tell, there is no vacuum supplied to this PCV system at all. The system appears to rely on what ever suction it can get from the turbo. All that oily condensation blows through the turbo, through the charge air cooler and into the throttle body. There is a small baffle box near where the system ties into the turbo inlet. I've seen videos where owners report this box full of oil/water. There's no easy way to drain it either. Here's a clip to get an idea of the plumbing.