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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 and Installation NOTE: If an A/C evaporator core leak is suspected, the A/C evaporator core must be leak tested before it is removed from the vehicle. For additional information, refer to Component Tests in Section 412-00. NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator. 1. Recover the refrigerant. For additional information, refer to Section 412-00. 2. Remove the instrument panel. For additional information, refer to Section 501-12. 3. Remove the junction box splash shield, if equipped. 4. Disconnect the cable ends. 5. Remove the junction block bracket. 1. Disconnect the electrical connector. 2. Remove the screws. 3. Detach the pin-type retainers and remove the junction block bracket. 6. Using suitable tools, clamp off the heater core inlet and outlet hoses. 7. Gently push each heater hose towards the heater core, compress the clip, and disconnect the heater hoses from the heater core. For additional information, refer to Section 412-00. 8. Disconnect the refrigerant spring lock couplings from the evaporator inlet and outlet. For additional information, refer to Section 412-00. 9. Remove the screw and the RH demister adapter. 10. Remove the screws and remove the defroster duct and LH demister adapter as an assembly. 11. Remove the nut. 12. Remove the nut. 13. Disconnect the vacuum line from the parking brake release solenoid. 14. Disconnect the vacuum connector from the panel/floor vacuum control motor. 15. Disconnect the vacuum line. 16. Remove the screw. 17. Remove the screw. 18. Remove the nut.

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1. Recover the refrigerant. For additional information, refer to Section 412-00. 2. If equipped with a 5.0L or 4.0L SOHC engine, disconnect the condenser to evaporator tube (19835) from the A/C condenser core (19712). 3. If equipped with a 4.0L push rod engine, disconnect the condenser to evaporator tube spring lock couplings from the A/C condenser core. For additional information, refer to Section 412-00. 4. Disconnect the condenser to evaporator tube spring lock coupling from the A/C evaporator core (19860) and remove the condenser to evaporator tube. For additional information, refer to Section 412-00. Installation 1. To install, reverse the removal procedure.

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1. Disconnect battery ground cable (14301) . 2. Remove two console armrest mounting access covers (047A62) at rear of console panel (045A36) (snaps out) to gain access to armrest retaining bolts. 3. Remove four armrest-to-floor bracket retaining bolts and remove armrest assembly (snaps out of console). 4. Remove console panel gear shift plate (044G24) (snaps out). On vehicles equipped with manual transmissions, shift boot is attached to bottom of finish panel. Remove shift knob and slide boot and console panel gear shift plate up shift lever to remove. 5. To remove top finish panel position emergency brake lever in the UP position. Remove four retaining screws and lift top finish panel up. Disconnect necessary wire connectors. 6. Remove two console-to-rear floor bracket retaining screws. 7. Insert a small screwdriver into two notches at bottom of front upper finish panel and snap out. 8. If the vehicle has a radio chassis (18806) , the radio chassis must be removed. Refer to Section 15-01. If the vehicle doesn’t have a radio chassis , use a small screwdriver and pry radio cover finish panel out of console. 9. Flex glove compartment bin tabs inward. Drop down glove compartment (06010) assembly. Remove two console-to-instrument panel retaining screws. 10. Remove four console bracket retaining screws. Remove console panel from vehicle. 11. Remove three bolts retaining steering column opening cover (3A673) and reinforcement panel. Remove cover. 12. Remove steering column opening reinforcement by removing two bolts. 13. Remove two bolts retaining steering column opening reinforcement and remove reinforcement. 14. Remove six steering column retaining nuts (two retaining the hood release mechanism and four retaining column to lower brake pedal support). Lower steering column to floor. 15. Remove upper and lower steering column shrouds (3530) and disconnect wiring from turn signal and windshield wiper switch (13K359) . 16. Remove steering column through bolt and nut on engine compartment side of cowl panel. Remove steering column from vehicle. 17. Remove brake pedal support nut. 18. Snap out instrument panel defroster opening grille (044E82) . 19. Remove screws from speaker covers. Snap out speaker covers. 20. Remove front screws retaining RH and LH scuff plates at cowl side trim panels. 21. Remove RH and LH cowl side trim panels. 22. Disconnect wiring at RH cowl side. 23. Remove cowl side retaining bolts (one each side). 24. Remove five cowl top screws attachments. 25. Gently pull instrument panel (04320) away from RH side of cowl panel. Disconnect speedometer cable, air conditioning controls and wire connectors. 26. Place a drain pan or suitable container under the heater water hose connections at the cowl panel. 27. Disconnect heater water hoses (18472) from heater core tubes and plug heater water hoses with suitable 5/8-inch and 3/4-inch plugs. Cap heater core tubes to prevent coolant loss from heater core (18476) during removal of heater case. 28. Remove screw retaining A/C evaporator case support bracket (19A639) to cowl top panel. 29. Disconnect vacuum supply supply hose (black) from A/C vacuum supply in engine compartment. 30. Working under the hood (16612) , remove nut retaining heater case to cowl panel. 31. Inside passenger compartment, remove screw retaining A/C evaporator case mounting bracket (19A865) to cowl top panel. 32. Remove one screw retaining A/C evaporator case mounting bracket below heater case to cowl panel. 33. Carefully pull heater case from cowl panel and remove heater case assembly from vehicle. 34. To install, reverse Removal procedure. Check operation of all components. 35. After repairs have been completed, check the coolant level in the radiator (8005) and in the radiator coolant recovery reservoir (8A080) . Fill as required with the recommended coolant mixture.

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NOTE: Replacement of the suction accumulator/drier is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator/drier. Removal 1. Disconnect battery ground cable (14301). Refer to Section 14-01. 2. Remove A/C air inlet duct (19A618) as described. 3. Drain radiator (8005) and disconnect heater water hose (18472) at the heater core (18476) in the engine compartment. Refer to Section 03-03. 4. Remove ground strap attachment (if present) from heater core tube. 5. Discharge A/C system. Refer to System Discharging and Recovery in Section 12-00. 6. Disconnect the refrigerant lines at the A/C evaporator core in the engine compartment using Spring Lock Coupling Tools 412-027 (T81P-19623-G2) (1/2 inch) and 412-040 (T85L-19623-A) (3/4 inch). Cap tubes to prevent entrance of dirt and moisture. 7. Remove heater outlet floor duct (18C433) as described. 8. Remove instrument panel (04320). Refer to Section 01-12. 9. Disconnect electrical harness connectors from heater blower motor switch resistor (18591) , blower motor (18527) and A/C electronic door actuator motor (19E616) . 10. Disconnect wiring harness retainers from A/C evaporator housing (19850). 11. Remove nut and bolt from the support bracket at left side of A/C evaporator housing . 12. Remove four nuts retaining A/C evaporator housing which are located in the engine compartment. 13. Remove A/C evaporator housing assembly. A/C Evaporator Housing Retaining Nut Locations