Bulletin No.:
Date:

14582A
October 2015

Service Bulletin
SPECIAL COVERAGE
SUBJECT:

Special Coverage Adjustment – Throttle Body – Reduced Power Mode

MODELS:

2008-2009 Buick Allure
2008-2011 Buick Enclave, Lacrosse
2009-2011 Buick Lucerne
2010-2011 Buick Regal
2008-2011 Cadillac CTS, SRX
2008-2009 Chevrolet Equinox, Uplander
2008-2011 Chevrolet Impala
2008, 2011-2012 Chevrolet Captiva
2008-2012 Chevrolet Colorado, Malibu
2009-2011 Chevrolet Traverse
2008-2012 GMC Canyon
2009-2011 GMC Acadia
2008-2010 Hummer H3
2009 Hummer H3T
2008-2009 Pontiac G8, Montana SV6, Torrent
2008-2010 Pontiac G6
2008 Saturn Outlook
2008-2009 Saturn VUE

The models involved in this bulletin have been revised. 2012 model year Buick Enclave, Lacrosse,
Regal; Chevrolet Traverse, and GMC Acadia vehicles are not involved and have been removed
from the model description. Please discard all copies of bulletin 14582.
CONDITION
On some 2008 model year (MY) Saturn Outlook; 2008-2009 MY Buick Allure, Chevrolet Equinox,
Chevrolet Uplander, Pontiac G8, Pontiac Montana SV6, Pontiac Torrent, and Saturn VUE; 20082010 MY Hummer H3 and Pontiac G6; 2008-2011 MY Cadillac CTS, Cadillac SRX, and Chevrolet
Impala; 2008, 2011-2012 MY Chevrolet Captiva; 2008-2011 MY Buick Enclave, Buick Lacrosse;
2008-2012 MY Chevrolet Colorado, Chevrolet Malibu, and GMC Canyon; 2009 MY Hummer H3T;
2009-2011 MY Buick Lucerne; 2009-2011 MY Chevrolet Traverse and GMC Acadia; and 20102011 MY Buick Regal vehicles, the throttle-position sensor may cause the engine to run rough,
cause the malfunction-indicator lamp and/or an engine reduced power message to illuminate, and
reduce the engine’s power.
SPECIAL COVERAGE ADJUSTMENT
This special coverage covers the condition described above for a period of 10 years or 120,000
miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service,
regardless of ownership.
Dealers are to replace the throttle body assembly and gasket for Bosch equipped vehicles, or to
install the throttle position sensor kit for Hitachi equipped vehicles. The Hitachi throttle body
assembly only needs to be replaced if the sensor kit does not correct the condition. The repairs will
Copyright 2015 General Motors. All Rights Reserved.

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Bulletin No.: 14582A

be made at no charge to the customer. For vehicles covered by Vehicle Service Contracts, all
eligible claims with repair orders on or after September 24, 2015, are covered by this special
coverage and must be submitted using the labor operation codes provided with this bulletin. Claims
with repair orders prior to September 24, 2015, must be submitted to the Service Contract provider.
VEHICLES INVOLVED
All involved vehicles are identified by Vehicle Identification Number on the Applicable Warranties
section in GM Global Warranty Management system. Dealership service personnel should always
check this site to confirm vehicle involvement prior to beginning any required inspections and/or
repairs. It is important to routinely use this tool to verify eligibility because not all similar vehicles
may be involved regardless of description or option content.
PART INFORMATION
Parts required to complete this recall are to be obtained from General Motors Customer Care and
Aftersales (GMCCA). Please refer to your “involved vehicles listing” before ordering parts. Normal
orders should be placed on a DRO = Daily Replenishment Order. In an emergency situation, parts
should be ordered on a CSO = Customer Special Order.
Note: Due to limited initial parts availability, dealers are encouraged not to order recall parts for use
as shelf stock. Parts should only be ordered when inspection determines that it is necessary to
replace the throttle body and/or gasket(s). Parts may have quantity limiters in effect.
Note: Use the vehicle identification number (VIN), SI, and the GM Electronic Parts Catalog to
determine which part to order.
Part Number

Description

Quantity/Vehicle

Service Part Numbers Supplied By Bosch
12589056

BODY, THROTTLE

1

12631016

BODY, THROTTLE

1

12631018

BODY, THROTTLE

1

12616994

BODY, THROTTLE

1

12616995

BODY, THROTTLE

1

12631186

BODY, THROTTLE

1

12631187

BODY, THROTTLE

1

12616438

BODY, THROTTLE

1

Service Part Numbers Supplied By Hitachi
12609500

BODY, THROTTLE

1

12615503

BODY, THROTTLE

1

12620183

BODY, THROTTLE

1

12615516

BODY, THROTTLE

1

19259452

SENSOR KIT, THROTTLE POSITION

1

19300180

SENSOR KIT, THROTTLE POSITION

1

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Bulletin No.: 14582A

Note: The gasket between the throttle body and the intake manifold may need to be replaced
when performing the following procedures. The gasket is included with some replacement throttle
body assemblies, if the gasket is not included with the service assembly, order the part. Use the
vehicle identification number (VIN), SI, and the GM Electronic Parts Catalog to determine which
gasket to order.
SERVICE PROCEDURE
Note: There are two repair procedures in this bulletin. Follow the correct procedure based on the
service part supplier. The part table above identifies the service part as a Bosch or Hitachi
supplied component.
With a scan tool, verify that DTC P2135, P0121 OR P0221 is set as Current or in History.
 If DTC P2135, P0121 OR P0221 is NOT set as Current or in History, no further action is required.
Inform the customer that any additional diagnosis and repairs are not covered under this special
coverage.
 If DTC P2135, P0121 OR P0221 is set as Current or in History, refer to the service procedures
below. Bosch supplied throttle bodies require that the throttle body be serviced by replacing the
complete assembly. Hitachi supplied throttle bodies only need the Throttle Position Sensor Kit
installed to correct the condition. Only replace the Hitachi throttle body assembly if the sensor kit
does not correct the condition.
REPAIR PROCEDURE FOR BOSCH EQUIPPED VEHICLES
Replace the throttle body assembly and gasket. Refer to Throttle Body Assembly Replacement in
SI.
REPAIR PROCEDURE FOR HITACHI EQUIPPED VEHICLES
Use the following steps to replace the Throttle Position Sensor Cover.
Note: Handle the electronic throttle control components carefully. Use cleanliness in order to
prevent damage. Do not drop the electronic throttle control components. Do not roughly handle
the electronic throttle control components. Do not immerse the electronic throttle control
components in cleaning solvents of any type.
Note: If at any time during this procedure the throttle body is dropped, abort this procedure and
REPLACE it with a new throttle body assembly.
1. Remove the throttle body and discard the throttle body gasket. Refer to Throttle Body
Assembly Replacement in SI.
2. Remove any loose debris and dirt from the throttle body assembly and the TP sensor cover.
Inspect the throttle body for damage.
Note: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage
fuel system components.
3. Clean the throttle body bore and the throttle plate using a clean shop towel with GM Top
Engine Cleaner, P/N 1052626 (in Canada, P/N 993026), or AC-Delco Upper Engine and Fuel
Injector Cleaner, P/N X66-P, or an equivalent product.

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2696698

Note: DO NOT mount the throttle body in a vise. The throttle body can be set on the top of a soft
protected workbench area.
4. Hold the throttle body with your hand, so that the throttle position (TP) sensor cover is facing
upward as shown.

2697177

5. Secure a rubber band around the throttle body and TP sensor cover as shown.

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2697335

6. Turn over the throttle body and use a flathead screwdriver to remove the two clips (1, 2) as
shown. Discard the clips.

2697396

Note: Do NOT pry on the machined sealing surface of the throttle body inlet duct.
7. Turn over the throttle body and use a flathead screwdriver to remove the four remaining clips
from the TP sensor cover. Discard the clips.

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2697514

8. Hold the throttle body with your hand, so that the TP sensor cover is facing upward. Grasp the
TP sensor cover and carefully lift it up and separate it from the throttle body.

2697650

Note: DO NOT allow the intermediate gear to fall out.
9. Maintain the throttle body in an upward position. Use your thumb to maintain contact with the
intermediate gear. If the intermediate gear falls out and impacts a hard workbench surface or
the floor, abort this procedure and REPLACE with a new throttle body assembly.

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2697675

10. Verify that the TP sensor cover gasket HAS REMAINED in the TP sensor cover as shown.
Ensure that the gasket is accounted for and remains with the old TP sensor cover.

2697721

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2698017

Note: If one or both of the TP sensor cover female throttle actuator motor terminals (1) HAVE
BEEN retained on the throttle actuator motor male terminals (2), remove and discard those female
terminals.
11. Observe the TP sensor cover for missing female throttle actuator motor terminals (1). Verify
that the female throttle actuator motor terminals HAVE REMAINED in the TP sensor cover and
HAVE NOT been retained on the throttle actuator motor male terminals (2). Discard the old TP
sensor cover, gasket and terminals.
12. Remove the new TP sensor cover from the protective shipping wrapper.

2698978

Note: If the TP sensor drive slot orientation is not aligned as shown, use a small flathead
screwdriver to gently rotate the TP sensor drive slot clockwise to the wide open throttle (WOT)
position as shown.
13. Place the TP sensor cover in the position as shown. Confirm the TP sensor drive slot
orientation is aligned in the TP sensor cover as shown.

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2697675

14. Verify that the TP sensor cover gasket is secure and properly positioned.

2699003

Bulletin No.: 14582A

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2699007

Note: The three TP sensor cover alignment tabs are highlighted in white for identification
purposes only.
15. Verify that all three of the TP sensor cover alignment tabs are present and are not damaged.
16. Grasp and hold the throttle body in the previously hand held upward position. Lightly depress
the intermediate gear to verify that it is fully seated and the gears are engaged.

2699109

17. Rotate the throttle body plate to the WOT position (1).

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2699101

18. Position and install the TP sensor cover to the throttle body. Hold the TP sensor cover in
position. If necessary for ease of the clip installation, secure a rubber band around the throttle
body and TP sensor cover.

2700151

19. Install the first new TP sensor cover clip (1) in the position shown.

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2699881

20. Install the remaining new TP sensor cover clips in the sequence shown.
21. Install a NEW throttle body gasket to the intake manifold.
22. Install the throttle body, bolts and nuts. DO NOT tighten the fasteners yet.
23. Connect the electrical connector to the throttle body.
24. Turn ON the ignition. Clear the DTC with a scan tool.
25. Observe the scan tool TP Sensor 1 and 2 Agree/Disagree parameter while slowly depressing
the accelerator pedal to WOT and then slowly returning the pedal to closed throttle. Repeat the
procedure several times. Rapidly depress the accelerator pedal from the rest position to the
wide open throttle position (WOT) and release pedal. Repeat the procedure several times. The
TP Sensor 1 and 2 Agree/Disagree parameter should display Agree.


If TP Sensor 1 and 2 Agree/Disagree parameter displays Agree, proceed to Step 27.

 If TP Sensor 1 and 2 Agree/Disagree parameter displays Disagree, replace the throttle
body assembly.
26. Observe the engine control module (ECM) module DTC information. Are DTC P1516, P2101
and/or P2176 set?


If DTC P1516, P2101 and/or P2176 are set, replace the throttle body.



If DTC P1516, P2101 and/or P2176 are not set, proceed to Step 28.

27. Tighten the throttle body fasteners.
Tighten: Tighten the fasteners to 10 Nm (89 lb in).
28. Install any remaining components that were removed during this procedure.
29. Perform the Throttle Learn Reset Procedure. Refer to Throttle/Idle Learn > Throttle Learn >
Reset Procedure in SI.