PI-0090-B

SB-10038345-1579
File In Section:
Bulletin No.:
Date:
Service Bulletin
PI0090B
March, 2011
PRELIMINARY INFORMATION
Subject:
Intermittent Engine Hesitation or Flutter without DTC (Inspect and Correct Intake
Camshaft Position (CMP) Sensor Bank 1 Connector Terminals for Intermittent
Conditions or Poor Connections)
Models:
2007-2011 Buick Enclave
2010-2011 Buick LaCrosse
2004-2011 Cadillac CTS, SRX, STS
2008-2011 Chevrolet Equinox
2009-2011 Chevrolet Malibu, Traverse
2010-2011 Chevrolet Camaro
2007-2011 GMC Acadia
2010-2011 GMC Terrain
2007-2009 Pontiac G6
2008-2009 Pontiac G8, Torrent
2007-2009 Saturn OUTLOOK
2008-2010 Saturn VUE
Equipped with 6 Cylinder Engine RPO LF1, LLT, LY7, LAU, LP1 or LP9
This PI is being revised to add the 2011 model year, add Step 11 and update the Warranty
Information. Please discard PI0090A.
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 the intake camshaft (cam) position (CMP) sensor bank 1 connector terminals
having intermittent conditions or poor connections. This will result in the engine control module (ECM) temporarily
being unable to determine engine position and it will stop fueling and sparking. The ECM will require at least one
engine revolution to resynchronize (resync) and if it does, it will not set a DTC.
Recommendation/Instructions
Important: This procedure is for the intake CMP sensor bank 1.
1. Turn ON the ignition with the engine OFF.
2. Perform the diagnostic system check - vehicle. Refer to Diagnostic System Check - Vehicle in SI.
• If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List – Vehicle in SI.
3. Turn OFF the ignition.
Copyright 2011 General Motors. All Rights Reserved.
Page 2
March, 2011
Bulletin No.: PI0090B
2429201
Note: Perform this visual inspection BEFORE disconnecting the intake CMP sensor bank 1 harness connector.
4. Visually inspect the CMP sensor harness connector for backed-out terminals as shown. Any of these circuits can
contribute to this condition. For the component location, refer to Camshaft Position Sensor Replacement - Bank 1
(Right Side) Intake in SI.
• If any intermittent conditions or poor connections are found, repair as needed. Refer to Connector Repairs
and Wiring Repairs in SI.
5. Disconnect the CMP sensor harness connector.
2429345
6. Visually inspect the CMP sensor harness connector for backed-out terminals as shown. Any of these circuits
can contribute to this condition.
• If any intermittent conditions or poor connections are found, repair as needed. Refer to Connector Repairs
and Wiring Repairs in SI.
• If intermittent conditions or poor connections are not found, proceed to Step 7.
7. Verify the torque of the CMP sensor bolt.
Tighten
Tighten the bolt to 10 N·m (89 lb in).
• If the CMP sensor bolt is properly torqued, proceed to Step 8.
8. Remove the CMP sensor. Refer to Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake in SI.
Bulletin No.: PI0090B
March, 2011
Page 3
9. Inspect for foreign material, such as metal shavings in the magnet area of the CMP sensor and on the reluctor
wheel.
• If any contamination is found, clean or replace the CMP sensor as needed.
10. Install the CMP sensor. Refer to Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake in SI.
11. Connect the CMP sensor harness connector.
12. Clear any DTCs that may be present.
13. 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
N6608
(MY 20042009)
N6650
(MY 20102011)
J4364
Description
Emissions System Wiring
and/or Connector Repair or
Replacement
Terminal Replacement
Labor Time
Use
Published
Labor
Operation Time
Camshaft Position Sensor
Replacement - Bank 1 (Right
Side) Intake

SB-10038345-1648
File in Section:
Bulletin No.:
Service Bulletin
Date:
PI0090E
February, 2012
PRELIMINARY INFORMATION
Subject:
Intermittent Engine Hesitation or Flutter Without DTC (Inspect and Correct Camshaft
Position Sensor - Bank 1 Exhaust or Camshaft Position Sensor - Bank 1 Intake
Harness Connector Terminals for Intermittent Conditions and Poor Connections)
Models:
2004-2006 Buick Rendezvous
2008-2012 Buick Enclave
2010-2012 Buick LaCrosse
2004-2012 Cadillac CTS, SRX
2006-2012 Cadillac STS
2008-2012 Chevrolet Equinox
2009-2012 Chevrolet Malibu, Traverse
2010-2012 Chevrolet Camaro
2012 Chevrolet Captiva Sport, Caprice PPV, Impala
2007-2012 GMC Acadia
2010-2012 GMC Terrain
2007-2009 Pontiac G6
2008-2009 Pontiac G8, Torrent
2007-2010 Saturn OUTLOOK
2008-2009 Saturn AURA
2008-2010 Saturn VUE
Equipped with 6 Cylinder Engine RPO LAU, LF1, LFW, LFX, LLT, LP1 or LY7
This PI is being revised to add the engine RPO LFX, the 2004-2006 Buick Rendezvous, the
2012 Chevrolet Caprice PPV, Captiva Sport and Impala to the Application Table, and update
the Application Table and Warranty Information. Please discard PI0090D.
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 Camshaft Position Sensor - Bank 1 Exhaust or Camshaft Position Sensor - Bank 1 Intake.
Recommendation/Instructions
Application Table to Determine Which Camshaft Position Sensor - Bank 1 Harness
Connector to Inspect
Camshaft Position Sensor Bank 1 Connector to
Inspect
Model
Model Year
Engine RPO and
Displacement
Buick Enclave
2008
LY7-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Buick Enclave
2009-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
Buick Enclave
2012
LLT-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Application Table to Determine Which Camshaft Position Sensor - Bank 1 Harness
Connector to Inspect (cont'd)
Camshaft Position Sensor Bank 1 Connector to
Inspect
Model
Model Year
Engine RPO and
Displacement
Buick LaCrosse
2010
LF1-3.0L
Camshaft Position Sensor Bank 1 Exhaust
Buick LaCrosse
2010-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
Buick LaCrosse
2012
LFX-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Buick Rendezvous
2004-2006
LY7-3.6L
Camshaft Position Sensor Bank 1 Intake
Cadillac CTS
2004
LY7-3.6L
2005-2007
LP1-2.8L
LY7-3.6L
Cadillac CTS
2008-2009
LP1-2.8L
LLT-3.6L
LY7-3.6L
Cadillac CTS
2010-2011
LLT-3.6L
Cadillac CTS
2010-2011
LF1-3.0L
Cadillac CTS
2012
LFW-3.0L
LFX-3.6L
Cadillac SRX
2004-2009
LY7-3.6L
Cadillac SRX
2010-2011
LAU-2.8L
Camshaft Position Sensor Bank 1 Intake
Cadillac SRX
2010-2011
LF1-3.0L
Camshaft Position Sensor Bank 1 Exhaust
Cadillac SRX
2012
LFX-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Cadillac STS
2006-2007
LY7-3.6L
Cadillac STS
2008-2009
LLT-3.6L
LY7-3.6L
Cadillac CTS
Camshaft Position Sensor Bank 1 Intake
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Intake
Cadillac STS
2010-2011
LLT-3.6L
Chevrolet Camaro
2010-2011
LLT-3.6L
Chevrolet Camaro
2012
LFX-3.6L
Chevrolet Captiva Sport
2012
LFW-3.0L
Chevrolet Caprice PPV
2012
LFX-3.6L
Chevrolet Equinox
2008-2009
LY7-3.6L
Chevrolet Equinox
2010
2011-2012
LF1-3.0L
LFW-3.0L
Chevrolet Impala
2012
LFX-3.6L
Chevrolet Malibu
2008-2012
LY7-3.6L
Chevrolet Traverse
2009-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
Chevrolet Traverse
2012
LLT-3.6L
Camshaft Position Sensor Bank 1 Exhaust
GMC Acadia
2007-2008
LY7-3.6L
Camshaft Position Sensor Bank 1 Exhaust
GMC Acadia
2009-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
GMC Acadia
2012
LLT-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Intake
Camshaft Position Sensor Bank 1 Exhaust
Application Table to Determine Which Camshaft Position Sensor - Bank 1 Harness
Connector to Inspect (cont'd)
Model
Model Year
Engine RPO and
Displacement
GMC Terrain
2010
2011-2012
LF1-3.0L
LFW-3.0L
Pontiac G6
2007-2009
LY7-3.6L
Pontiac G8
2008-2009
LY7-3.6L
Pontiac Torrent
2008-2009
LY7-3.6L
Camshaft Position Sensor Bank 1 Connector to
Inspect
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Intake
Saturn AURA
2008-2009
LY7-3.6L
Saturn OUTLOOK
2007-2008
LY7-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Saturn OUTLOOK
2009-2010
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
Saturn VUE
2008-2010
LY7-3.6L
Camshaft Position Sensor Bank 1 Exhaust
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.
1. Review the Application Table in order to determine which camshaft position sensor - bank 1 harness connector
to inspect.
2. Turn ON the ignition with the engine OFF.
3. Perform the Diagnostic System Check - Vehicle.
⇒ If DTCs are set, refer to Diagnostic Trouble Code (DTC) List – Vehicle in SI.
4. Turn OFF the ignition.
2429201
Note: Perform this visual inspection BEFORE disconnecting the affected camshaft position sensor - bank 1
harness connector.
5. 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.
6. Disconnect the camshaft position sensor harness connector.
2429345
7. Visually inspect the camshaft position sensor harness connector for damaged or 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 8.
⇒ If intermittent conditions or poor connections are not found, proceed to Step 8.
8. Remove the camshaft position sensor. Refer to SI.
9. 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.
10. Install the camshaft position sensor.
Tighten
Tighten the bolt to 10 Y (89 lb in).
11. Connect the camshaft position sensor harness connector.
12. Clear any DTCs that may be present.
13. 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
(MY 2004-2009)
N6608
Labor Time
Emissions
System
Wiring and/or
Connector
Repair or
Replacement
Labor
Operation
Use
Published
Labor
Operation
Time
Description
Labor Time
N6650
(MY 2010-2012)
Terminal
Replacement
J4363
Camshaft
Position
Sensor
Replacement
- Bank 1
(Right Side)
Exhaust
J4364
Camshaft
Position
Sensor
Replacement
- Bank 1
(Right Side)
Intake

SB-10038345-5716
File In Section:
Bulletin No.:
Date:
Service Bulletin
PI0090C
June, 2011
PRELIMINARY INFORMATION
Subject:
Intermittent Engine Hesitation or Flutter without DTC (Inspect and Correct
Camshaft Position Sensor - Bank 1 Exhaust or Camshaft Position Sensor Bank 1 Intake Harness Connector Terminals for Intermittent Conditions and Poor
Connections)
Models:
2008-2011 Buick Enclave
2010-2011 Buick LaCrosse
2004-2011 Cadillac CTS, SRX
2006-2011 Cadillac STS
2008-2011 Chevrolet Equinox
2009-2011 Chevrolet Malibu, Traverse
2010-2011 Chevrolet Camaro
2007-2011 GMC Acadia
2010-2011 GMC Terrain
2007-2009 Pontiac G6
2008-2009 Pontiac G8, Torrent
2008-2009 Saturn AURA
2007-2010 Saturn OUTLOOK
2008-2010 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 2008-2009 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 Camshaft Position Sensor - Bank 1 Exhaust or Camshaft Position Sensor - Bank 1 Intake.
Copyright 2011 General Motors. All Rights Reserved.
Page 2
June, 2011
Bulletin No.: PI0090C
Recommendation/Instructions
Application Table to Determine Which Camshaft Position Sensor - Bank 1 Harness Connector
to Inspect
Model
Model Year
Engine RPO and
Displacement
Camshaft Position Sensor Bank 1 Connector to
Inspect
Buick Enclave
2008
LY7-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Buick Enclave
2009-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
Buick LaCrosse
2010
LF1-3.0L
Camshaft Position Sensor Bank 1 Exhaust
Buick LaCrosse
2010-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
Cadillac CTS
2004
LY7-3.6L
Cadillac CTS
2005-2007
LP1-2.8L
LY7-3.6L
Cadillac CTS
2008-2009
LP1-2.8L
LLT-3.6L
LY7-3.6L
Cadillac CTS
2010-2011
LLT-3.6L
Cadillac CTS
2010-2011
LF1-3.0L
Cadillac SRX
2004-2009
LY7-3.6L
Cadillac SRX
2010-2011
LAU-2.8L
Cadillac SRX
2010-2011
LF1-3.0L
Cadillac STS
2006-2007
LY7-3.6L
Cadillac STS
2008-2009
LLT-3.6L
LY7-3.6L
Cadillac STS
2010-2011
LLT-3.6L
Chevrolet Camaro
2010-2011
LLT-3.6L
Chevrolet Equinox
2008-2009
LY7-3.6L
Chevrolet Equinox
2010
2011
LF1-3.0L
LFW-3.0L
Chevrolet Malibu
2008-2011
LY7-3.6L
Chevrolet Traverse
2009-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
GMC Acadia
2007-2008
LY7-3.6L
Camshaft Position Sensor Bank 1 Exhaust
GMC Acadia
2009-2011
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
GMC Terrain
2010
2011
LF1-3.0L
LFW 3.0L
Pontiac G6
2007-2009
LY7-3.6L
Pontiac G8
2008-2009
LY7-3.6L
Pontiac Torrent
2008-2009
LY7-3.6L
Saturn AURA
2008-2009
LY7-3.6L
Saturn OUTLOOK
2007-2008
LY7-3.6L
Saturn OUTLOOK
2009-2010
LLT-3.6L
Camshaft Position Sensor Bank 1 Intake
Saturn VUE
2008-2010
LY7-3.6L
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Intake
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Intake
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Intake
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Exhaust
Camshaft Position Sensor Bank 1 Intake
Camshaft Position Sensor Bank 1 Exhaust
Bulletin No.: PI0090C
June, 2011
Page 3
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.
1. Observe the table in order to determine which camshaft position sensor - bank 1 harness connector to inspect.
2. Turn ON the ignition with the engine OFF.
3. Perform the Diagnostic System Check - Vehicle.
• If DTCs are set, refer to Diagnostic Trouble Code (DTC) List – Vehicle in SI.
4. Turn OFF the ignition.
2429201
Note: Perform this visual inspection BEFORE disconnecting the affected camshaft position sensor - bank 1 harness
connector.
5. 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.
6. Disconnect the camshaft position sensor harness connector.
Page 4
June, 2011
Bulletin No.: PI0090C
2429345
7. Visually inspect the camshaft position sensor harness connector for damaged or 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 8.
• If intermittent conditions or poor connections are not found, proceed to Step 8.
8. Remove the camshaft position sensor. Refer to SI.
9. 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.
10. Install the camshaft position sensor.
Tighten
Tighten the bolt to 10 N·m (89 lb in).
11. Connect the camshaft position sensor harness connector.
12. Clear any DTCs that may be present.
13. 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
N6608
(MY 20042009)
N6650
(MY 20102011)
J4364
Description
Emissions System Wiring
and/or Connector Repair or
Replacement
Terminal Replacement
Labor Time
Use
Published
Labor
Operation Time
Camshaft Position Sensor
Replacement - Bank 1 (Right
Side) Intake