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 WarningFastener Tightening Specifications - Frame and Structure
Fastener Tightening SpecificationsApplicationSpecificationMetricEnglishFront Lower Control Arm Bracket Brace Bolt30-Y22-lb-ftFront Suspension Crossmember Support Bracket to Body Bolts58-Y43-lb-ftFront Suspension Crossmember to Body Bolts155-Y114-lb-ftFront Suspension Crossmember to Transmission Fron ...