For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition
65 WarningInput Shaft Support Replacement (Gen 2) Automatic Transmission Unit
Input Shaft Support ReplacementCalloutComponent Name13-5 Reverse and 4-5-6 Clutch Fluid Seals-(Qty:-3)Note:Discard the fluid seals. They are not reusable.Refer to3-5-Reverse and 4-5-6 Clutch Fluid Seal Ring Replacement.2Input Shaft Support Bolts-M6-x-50 (Qty:-3)Caution:Refer toFastener Caution.Tight ...