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SIR component location affects how a vehicle should be serviced. There are parts of the SIR system installed in various locations around a vehicle. To find the location of the SIR components refer to SIR Identification Views . There are several reasons for disabling the SIR system, such as repairs to the SIR system or servicing a component near or attached to an SIR component. There are several ways to disable the SIR system depending on what type of service is being performed. The following information covers the proper procedures for disabling/enabling the SIR system. SIR Service Precautions Caution: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Failure to observe the correct procedure could cause deployment of the SIR components. Serious injury can occur. Failure to observe the correct procedure could also result in unnecessary SIR system repairs. The inflatable restraint sensing and diagnostic module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the air bags if the SDM loses battery power during a collision. Deployment power is available for as much as 1 minute after disconnecting the vehicle power. Waiting 1 minute before working on the system after disabling the SIR system prevents deployment of the air bags from the reserved energy supply. General Service Instructions The following are general service instructions which must be followed in order to properly repair the vehicle and return it to its original integrity: • Do not expose inflator modules to temperatures above 65°C (150°F). • Verify the correct replacement part number. Do not substitute a component from a different vehicle. • Use only original GM replacement parts available from your authorized GM dealer. Do not use salvaged parts for repairs to the SIR system.

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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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If you encounter vehicles that exhibit the above conditions, refer to SI for the appropriate DTC(s) set. If no trouble is found, the cause may be due to an ECM ground terminal that has corroded with rust over time. Inspect the main engine wiring harness ground terminal (G103) for this condition. The wire terminal (G103) attaches either to the front or to the rear of the right side cylinder head, depending on the model year of the Full Size Pickup and/or Utility Trucks. If the ECM ground terminal has been found to be corroded, then follow the service procedure outlined in this bulletin to correct the corrosion issue. 1. Remove either the nut or bolt securing the main engine wiring harness ground terminal (G103) to the right cylinder head. Refer to the above illustration to determine where the ground is located on the vehicle (1). 2. Remove all rust from the ground terminal, the cylinder head and the retaining nut or bolt. 3. Position the main engine wiring harness ground terminal and install the nut or bolt. Tighten:: Tighten the retaining nut or bolt to 16 N.m (12 lb ft). 4. Apply some type of electrical moisture sealant to protect the harness terminal from further corrosion.

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1. Disconnect the electrical connector (3). 2. Remove the blower motor resistor mounting screws (1). 3. Remove the blower motor resistor (2) from the blower case. 2. Install the blower motor resistor mounting screws (1). Tighten Tighten the screws to 1.9 N.m (17 lb in). 3. Connect the electrical connector (3). Removal Procedure (C60) 1. 2. 3. 4. 5. Remove the A/C control relay bracket with the relay. Remove the blower resistor harness. Remove the stud from the IP, if necessary. Remove the blower motor resistor mounting screw. Cut the access cover from the case. Cut all four sides of the cover in order to remove the three attaching screws. Use a sharp utility knife in order to cut the case. Make the cuts straight and clean. The access cover must be reinstalled and is visible to the customer.

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Condition General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 2001 model year Chevrolet Silverado, Suburban; GMC Sierra and Yukon XL model vehicles, equipped with an 8.1L V8 (RPO L18 – VIN G) engine. Some of these vehicles have a condition in which the crankshaft position sensor can fail intermittently or permanently. If the sensor fails intermittently, the Service Engine Soon (SES) light may illuminate and the vehicle may run rough. In addition, the engine may stall, and if so, may re-start immediately or after a cool down period. If the sensor fails permanently, the engine will quit running and will not re-start.