Quieting Buick Suspension Noise

March 15, 2023
This bulletin applies to 2011-2015 Buick Allure, LaCrosse and Regal vehicles equipped with the performance strut assemblies.

This bulletin applies to 2011-2015 Buick Allure, LaCrosse and Regal vehicles equipped with the performance strut assemblies. Some customers may comment on a click, pop or clunk noise from the front suspension while braking or driving over bumps at low speed when turning.

This may be caused by a loss of clamp load at the lower revolute joint (kingpin bushing) at the knuckle attachment. Remove the front suspension lower control arm and inspect the torque on the kingpin bushing nuts. If torque is not at least 45 ft-lb, replace the king pin bushings and nuts for both strut assemblies.

When installing the new bushing nuts, torque the nuts once, then remove the nuts and apply liquid thread locker P/N 8902 1297 to the kingpin bushing studs. Re-torque the new nuts to 74 ft-lb.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Sponsored Recommendations

Variable Valve Timing (VVT) Training Series

Almost every new vehicle is equipped with VVT technology. This video explains the weak points in OE designs and gives you a complete overview of the replacement options available...

Cam & Crank Sensor Training Series

Today's advanced engines depend on accurate and consistent information from cam and crank sensors for performance, fuel economy and emissions, and not all cam and crank sensors...

Buying Your Next Diagnostic Tablet

When you last invested in a diagnostic tablet for your shop, did you consider it a potential gateway to increased revenue? Probably not. It’s likely you viewed it as a necessary...

Access Carside OEM Repair Data with MOTOR TruSpeed

Now available on all Autel MaxiSYS Ultra Series tools, MOTOR TruSpeed Repair delivers expanded OEM service and repair data within days of being published by

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!