Review on ACDelco 12636175 OEM Variable Equipment by Polo Bradley

Had a P0023 (2012 Enclave) (also had a P2099, P0430) engine chugged slightly in the OD Finally solved it by replacing the VVT solenoid (I think the problem was that I broke the plastic case of the solenoid when replacing the alternator). But I replaced the camshaft position sensor first (see steps below) but didn't remove the codes so I replaced the VVT solenoid after the solenoid connector snapped in my hands when trying to unplug the connector to check. Also, liquid tape was used to reseal the connector wires when they were pulled out of the connector and revealed a bare wire. Note: I have performed all of the following steps and have not solved the problem. Phew: Bank 2 camshaft sensor and lower O2 sensor replaced. but the code is back. Exhaust bank 2 is located to the left of the oil filler cap (near the top of the engine). Unfortunately, it's hidden behind a bunch of stuff that needs to be removed to get to it. Here's what it took: Disconnect the negative battery cable from the battery. Remove 10mm while holding the AC line at the top front. Remove (2) 10mm overflow cup fixings (move aside). Remove the fuse box cover. Loosen the (2) 10mm Phillips screws (holding the fuse harness) in the fuse box. Remove the (1) 13mm screw connecting the positive battery terminals to the fuse box. Disconnect and remove the middle section of the fuse box (with fuses) by removing the wire harness from underneath. Disconnect/remove the lower part of the fuse block. Remove (3) 10mm Aluminum Fuse Box Base Plate. Disconnect the wire harnesses from the baseplate. Remove the (2) 15mm motor mounting bolts (holding the eight-shaped rubber mount). Slide the figure-of-eight rubber support aside. Remove (2) 18mm screws from the portion of the bracket that bolts directly to the motor. (1) Remove camshaft sensor 10mm bolt. Remove the sensor. Loosen the sensor cable clamp. Conversely, to replace everything. Lots of detail to remove - it wasn't too bad once I figured it all out, just lots of little tweaks to get such a small detail out. I would give myself 1.5 hours (or more) to remove and 1.5 hours to replace. The same/similar procedure can also be used on this car to access the alternator, but I would also remove the alternator radiator hose and the plastic alternator cover.