2018 Buick Envision Suspension & Steering Torque Specs

OEM-referenced torque, socket, and thread specs for the 3 front and rear suspension and steering fasteners on the 2018 Buick Envision — including the Front Lower Control Arm Bolt (torques to 111 ft-lbs (150 Nm), 21mm socket, M14x1.5 thread). Every value is safety-critical; verify against your service manual and use a calibrated torque wrench. Full bolt specs for the rest of the vehicle are linked below.

Control Arms & Ball Joints torque — 2018 Buick Envision

On the 2018 Buick Envision, the control arms & ball joints fasteners are: Front Lower Control Arm Bolt (torques to 111 ft-lbs (150 Nm), 21mm socket, M14x1.5 thread); Rear Lower Control Arm Bolt (torques to 85 ft-lbs (115 Nm), 18mm socket, M12x1.5 thread). Suspension and steering bolts are safety-critical — use a calibrated torque wrench, replace any prevailing-torque (locking) nut that has been removed, and confirm the value against your service manual before reassembly.

Struts, Shocks & Springs torque — 2018 Buick Envision

On the 2018 Buick Envision, the struts, shocks & springs fasteners are: Front Strut Top Nut (torques to 37 ft-lbs (50 Nm), 15mm socket, M12x1.5 thread). Suspension and steering bolts are safety-critical — use a calibrated torque wrench, replace any prevailing-torque (locking) nut that has been removed, and confirm the value against your service manual before reassembly.

How to torque Envision suspension & steering fasteners

Torque suspension and steering fasteners with the vehicle at ride height (wheels loaded) wherever a bushing is involved — tightening a control-arm or sway-bar bushing bolt with the suspension hanging pre-loads the rubber and it fails early. Clean the threads, start every fastener by hand to avoid cross-threading, and make the final pass with a calibrated torque wrench rather than an impact gun. Ball-joint and tie-rod castle nuts take a new cotter pin; never back a castle nut off to line up the hole — only tighten to the next slot.

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