Document ID: The following diagnosis might be helpful if the vehicle exhibits the symptoms described in this PI.

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Garey Jefferson
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1 Page 1 of 6 6/14/ Document ID: #PI0090C: Intermittent Engine Hesitation or Flutter without DTC (Inspect and Correct Camshaft Position Sensor-Bank 1 or Bank 1 Harness Connector Terminals for Intermittent Conditions - (Jun 7, ) Subject: Models: Intermittent Engine Hesitation or Flutter without DTC (Inspect and Correct or Harness Connector Terminals for Intermittent Conditions and Poor Connections) Buick Enclave Buick LaCrosse 2004-, SRX Cadillac STS Equinox - Malibu, Traverse Camaro GMC Acadia GMC Terrain Pontiac G6 Pontiac G8, Torrent Saturn AURA Saturn OUTLOOK Saturn VUE Equipped with 6 Cylinder Engine RPO LAU, LF1, LFW, LLT, LP1 or LY7 This PI is being revised to remove engine RPO LP9, add the Saturn AURA, and in the Recommendation/Instructions section, add an application table, clarify text and revise the action taken in certain Steps. Please discard PI0090B. The following diagnosis might be helpful if the vehicle exhibits the symptoms described in this PI. Condition/Concern Some customers may comment on an intermittent engine hesitation or flutter. This condition may be caused by intermittent conditions and poor connections at the terminals in the harness connector for the or Camshaft Position Sensor - Bank 1. General Motors. All rights reserved.

2 Page 2 of 6 6/14/ Recommendation/Instructions Application Table to Determine Which Harness Connector to Inspect Model Model Year Engine RPO and Displacement Connector to Inspect Buick Enclave 2008 Buick Enclave - Buick LaCrosse Buick LaCrosse LP1-2.8L LP1-2.8L Cadillac SRX Cadillac SRX LAU-2.8L

3 Page 3 of 6 6/14/ Cadillac SRX Cadillac STS Cadillac STS Cadillac STS Camaro Equinox Equinox LFW-3.0L Malibu Traverse - GMC Acadia GMC Acadia - GMC Terrain LFW 3.0L Pontiac G6

4 Page 4 of 6 6/14/ Pontiac G8 Pontiac Torrent Saturn AURA Saturn OUTLOOK Saturn OUTLOOK - Saturn VUE Important: This procedure is the same for the camshaft position sensor - bank 1 exhaust or camshaft position sensor - bank 1 intake. Note: Depending on the model and model year of the vehicle, the camshaft position (CMP) sensor in the General Motors Service Information may be identified by slightly different name variations. Observe the table in order to determine which camshaft position sensor - bank 1 harness connector to inspect. Turn ON the ignition with the engine OFF. Perform the Diagnostic System Check - Vehicle. If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle in SI. Turn OFF the ignition.

Refer to Testing for Intermittent Conditions and Poor connections in SI. If intermittent conditions or poor connections are found, repair as needed. Refer to SI.

5 Page 5 of 6 6/14/ Note: Perform this visual inspection BEFORE disconnecting the affected camshaft position sensor - bank 1 harness connector. Visually inspect the camshaft position sensor harness connector for backed-out terminals as shown. Any of these circuits can contribute to this condition. Refer to Testing for Intermittent Conditions and Poor connections in SI. If intermittent conditions or poor connections are found, repair as needed. Refer to SI. After completing the repair, proceed to Step 6. If intermittent conditions or poor connections are not found, proceed to Step 6. Disconnect the camshaft position sensor harness connector.

6 Page 6 of 6 6/14/ Visually inspect the camshaft position sensor harness connector for damaged or backedout terminals as shown. Any of these circuits can contribute to this condition. Refer to Testing for Intermittent Conditions and Poor connections in SI. If intermittent conditions or poor connections are found, repair as needed. Refer to SI. After completing the repair, proceed to Step 8. If intermittent conditions or poor connections are not found, proceed to Step 8. Remove the camshaft position sensor. Refer to SI. Inspect for any foreign material, such as metal shavings in the magnet area of the camshaft position sensor and on the reluctor wheel. If any contamination is found, clean or replace the camshaft position sensor as needed. Install the camshaft position sensor. Tighten Tighten the bolt to 10 N m (89 lb in). Connect the camshaft position sensor harness connector. Clear any DTCs that may be present. Perform the diagnostic repair verification after completing this procedure. Refer to Diagnostic Repair Verification in SI. Warranty Information For vehicles repaired under warranty, use: Labor Operation Description Labor Time N6608 (MY ) Emissions System Wiring and/or Connector Repair or Replacement N6650 (MY ) Terminal Replacement Use Published Labor Operation Time J4364 Camshaft Position Sensor Replacement - Bank 1 (Right Side) GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and knowhow to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

PRELIMINARY INFORMATION

SB-10038345-1648 Service Bulletin File in Section: - Bulletin No.: PI0090E Date: February, 2012 PRELIMINARY INFORMATION Subject: s: Intermittent Engine Hesitation or Flutter Without DTC ( and Correct Camshaft