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Subject: Models: EI10035 — Engineering Information –Front Suspension Noise, Clunk, Popping, Rattle 2010 Chevrolet Camaro Condition Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this PI. Some customers may comment on a noise coming from the front suspension. Description of the noise can include suspension clunk, popping or rattle. Upon further inspection, the noise can be generally traced to the front strut assembly. Strut assembly components, including struts and top mounts, returned under warranty have been tested with no trouble found. Cause GM Engineering is attempting to determine the root cause of the condition above. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to “root cause” the customer’s concern and develop/validate a field fix.

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Removal 1. Remove the front wheel spindle (3105) and the right and left shaft and joint assembly. Refer to Spindle, RH and LH Shaft and Joint Assembly in the Removal and Installation portion of this section. 2. Disconnect the steering linkage, if necessary, from the knuckle. Refer to Section 11-03 in the Body, Chassis Manual. Steering Knuckle Installation 3. Remove the cotter pin from the stud of the front suspension upper ball joint (3049). Loosen the nut on the top stud and the bottom nut inside the steering knuckle. Remove the top nut. 4. Sharply hit the top stud with a plastic or rawhide hammer to free the knuckle from the axle arm. Remove and discard bottom nut. 5. NOTE: Note the orientation of the camber adjuster to make sure of the same camber setting. Remove camber adjuster by hand or, if difficulty is encountered, use Pitman Arm Puller T64P-3590-F. 6. Place steering knuckle in vise and remove snap ring from bottom ball joint socket if so equipped. 7. Remove plug from U-Joint Tool T74P-4635-C and replace with Plug T80T-3010-A4 (part of 4WD Ball Joint Tool Set T80T-3010-A). 8. Assemble U-Joint Tool T74P-4635-C and Receiving Cup T80T-3010-A2 (part of 4WD Ball Joint Tool Set T80T-3010-A). 9. NOTE: Always remove front suspension lower ball joint first. Turn forcing screw clockwise until front suspension lower ball joint is removed from steering knuckle. 10. Repeat procedure and remove front suspension upper ball joint. Installation 1. Clean steering knuckle bore and insert front suspension lower ball joint as straight as possible. 2. NOTE: If ball joint cannot be installed to the proper depth, realign Receiving Cup T80T-3010-A3. To replace the front suspension lower ball joint, assemble U-Joint Tool, Receiving Cup T80T-3010-A3 (part of 4WD Ball Joint Tool Set T80T-3010-A) and Installing Cup from Ball Joint Adapter Set D81T-3010-A or equivalent.

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90 Nm + 45 ° ( 1 / 8 ) additional turn. loosening and tightening Remove any paint residue and/or corrosion in the threads of outer joint before screwing on nut. 3 – Phillips-head screw 4 – Brake disc Notes for repairing 5 – Brake caliper Do not remove brake hose when working on front wheel suspension Hang with wire or similar means Replace brake pads 6 – Metal countersunk screw 7 – Wheel hub Pressing out Pressing in Remove bearing inner race 8 – Rotor for speed sensor Only on vehicles with ABS Front brakes – brake caliper Girling, servicing Brake pads, removing and installing 9 – Hex bolt, 10 Nm 10 – Cover plate 11 – Securing ring Check for proper seating 12 – Wheel bearing Pressing out Replace, destroyed during ejection Pressing in 13 – Self-locking hex nut, 35 Nm 14 – Wheel bearing housing 15 – Ribbed bolt, 125 Nm 16 – Drive axle Removing and installing Servicing 17 – Multipoint socket head bolt, 45 Nm 18 – Hex bolt Camber setting Drive axle with triple rotor joint, removing and installing Drive axle, servicing Camber of front wheels, adjusting Mark installation position before loosening 19 – Hex bolt 20 – Bracket 21 – Stop 22 – Self-locking hex nut, 60 Nm unbolt and bolt in 23 – Suspension strut Disassembling and assembling 24 – Self-locking hex nut, 95 Nm 25 – Tie rod Removing and installing Front suspension strut – Basic/Plus suspensions, servicing Tie rod – power steering gear, TRW and ZF, removing and installing

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DESCRIPTION WHEEL ALIGNMENT NOTE: Suspension components with rubber/urethane bushings should be tightened with the vehicle at normal ride height. It is important to have the springs supporting the weight of the vehicle when the fasteners are torqued. If springs are not at their normal ride position, vehicle ride comfort could be affected and premature bushing wear may occur. Wheel alignment involves the correct positioning of the wheels in relation to the vehicle. The positioning is accomplished through suspension and steering linkage adjustments. An alignment is considered essential for efficient steering, good directional stability and to minimize tire wear. The most important measurements of an alignment are caster, camber and toe. CAUTION: Never attempt to modify suspension or steering components by heating or bending. NOTE: Periodic lubrication of the front suspension/steering system components may be required. Rubber bushings must never be lubricated. Refer to LUBRICATION & MAINTENANCE for the recommended maintenance schedule. OPERATION WHEEL ALIGNMENT CASTER is the forward or rearward tilt of the steering knuckle from vertical. Tilting the top of the knuckle forward provides negative caster. Tilting the top of the knuckle rearward provides positive caster. Positive caster promotes directional stability. This angle enables the front wheels to return to a straight ahead position after turns. See Fig. 1 CAMBER is the inward or outward tilt of the wheel relative to the center of the vehicle. Tilting the top of the wheel inward provides negative camber. Tilting the top of the wheel outward provides positive camber. Incorrect camber will cause wear on the inside or outside edge of the tire. See Fig. 1 TOE is the difference between the leading inside edges and trailing inside edges of the front tires. Wheel toe position out of specification cause’s unstable steering, uneven tire wear and steering wheel off- center. The wheel toe position is the final front wheel alignment adjustment. See Fig. 1 THRUST ANGLE is the angle of the rear axle relative to the centerline of the vehicle. Incorrect thrust angle can cause off-center steering and excessive tire wear. This angle is not adjustable, damaged component(s) must be replaced to correct the thrust angle. See Fig. 1 STANDARD PROCEDURE HEIGHT MEASUREMENT

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1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02. 2. Remove the wheel and tire assembly. For additional information, refer to Section 204-04. 3. CAUTION: Do not allow the disc brake caliper to hang suspended from the brake hose. Provide a suitable support. Remove the caliper support bracket bolts, then position the caliper support bracket and brake caliper aside. 4. Disconnect the front anti-lock brake sensor (ABS) wire assembly. Disconnect the ABS electrical connector. Unclip the ABS harness routing clips. 5. Remove the tie-rod castellated nut. 1. Remove and discard the cotter pin. 2. Remove and discard the castellated nut. 6. CAUTION: Do not use a hammer to separate the tie-rod from the wheel knuckle or damage to the wheel knuckle will result. CAUTION: Do not damage the tie-rod boot when installing the special tool. Using the special tool, separate the tie-rod end from the front wheel knuckle. 7. Using a suitable jack, support the front suspension lower arm. 8. Remove the lower ball joint castellated nut. 1. Remove and discard the cotter pin. 2. Remove and discard the castellated nut. 9. Using the special tool, separate the front wheel knuckle from the suspension lower arm. Then, loosely reinstall the castellated nut. 10. Remove the upper ball joint castellated nut. 1. Remove and discard the cotter pin. 2. Remove and discard the castellated nut. 11. CAUTION: Do not damage the ball joint boot when installing the special tool. Using the special tool, separate the front wheel knuckle from the front suspension upper arm. 12. Remove the hand-tightened lower ball joint castellated nut, then remove the front wheel knuckle. 13. Remove the snap ring from the ball joint. Discard the snap ring. 14. Using a suitable tool, remove the ball joint.