08 Malibu steering issue

Greetings all,

My wife has an 08 malibu w/ 4 cylinder (2.4) and the steering has become harder to turn especially while starting from a red light, stop sign, etc. -almost feels like the power steering is not engaging.

she called a little bit ago and said that at hwy speed the wheel pulls right to left. while sitting at a stop sign the other day i noticed that with the wheel at an 1/8th to a quarter turn to the right, the wheel shook right to left repeatedly.

not sure what the issue could be. we are out of warranty at 41k so if this is something that we can diagnose, this would be very beneficial!

wheel acts like this in the video:
thanks for the help...