Curt trailer hitch # C12115 will fit all US models of the 2016 Chevy Malibu Limited including your LT. The recommended ball mount is # C45017. For a 1-7/8 inch ball use # 19256 and for a 2 inch ball use # 19258 and for a pin and clip use # F-4.
For a trailer wiring harness I recommend # C56176 to add a 4-Way flat connector to the rear of the vehicle. view full answer...
The Thule ProRide Roof Bike Rack XT # TH598004 referenced in your question will indeed clamp on and be compatible with the Yakima JetStream Crossbars # Y00425 installed on your 2016 Chevrolet Malibu Limited. The ProRide is designed to fit these type of aero-style bars and will work great with this system. view full answer...
For the U.S. version of the 2016 Chevrolet Malibu Limited LTZ we do offer custom-fit Class II hitches from several makers, including the Curt # C12115 which offers both the lowest cost and highest tongue weight rating (350-lbs). If used with a bike rack or cargo carrier you'll need to add the support strap # 18050. This hitch is made specifically for the 2016 LTZ.
Any accessory items you use should also be Class II to ensure compatibility. For reference I linked you to Class II bike carriers... view full answer...