Subject:
11273 — Special Coverage Adjustment – Throttle Position Sensor Replacement
Models:
2008-2010 Cadillac Escalade, Escalade ESV, Escalade EXT
2008-2009 Chevrolet TrailBlazer
2008-2010 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe
2009-2010 Chevrolet Colorado
2008-2009 GMC Envoy
2008-2010 GMC Savana, Sierra, Yukon, Yukon XL
2009-2010 GMC Canyon
2008-2009 HUMMER H2
2008-2010 HUMMER H3
2009-2010 HUMMER H3T
Equipped with V8 Engine (LFA, LY2, L20, LMG, LC9, LH6, LMF, LH8, LH9, L76, LS2, LY5, LY6, L92, L96, LZ1, L94, L9H)
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Customers involved in this Special Coverage will be notified in phases. The first phase will include customers with 2008 model year vehicles.
Condition
On some 2008-2009 Chevrolet TrailBlazer; GMC Envoy; HUMMER H2; 2008-2010 Cadillac Escalade, Escalade ESV, Escalade EXT; Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe; GMC Savana, Sierra, Yukon, Yukon XL; HUMMER H3; 2009-2010 Chevrolet Colorado; GMC Canyon; and HUMMER H3T vehicles, equipped with a V8 engine, the throttle position sensor may cause the engine to run rough and cause the malfunction indicator lamp and/or an Engine Reduced Power message to illuminate. If this occurs, it could result in reduced engine 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 position sensor and reprogram the Engine Control Module. The repairs will 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 21, 2012, 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 21, 2012, 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.
Parts Information
Parts required to complete this special coverage are to be obtained from General Motors Customer Care and Aftersales (GMCC&A).
Part Number
Description
Quantity/Vehicle
19259452
SENSOR KIT, THROT POSN
1
Service Procedure
Caution: 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.
Warning: Approved safety glasses and gloves should be worn when performing this procedure to reduce the chance of personal injury.
1.
With a scan tool, verify that DTC P2135 is set as Current or in History.
•
If DTC P2135 is set as Current or in History, proceed to Step 2 and perform the service procedure in this bulletin.
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If DTC P2135 is NOT set as Current or in History, refer to Diagnostic Trouble Code (DTC) List - Vehicle or Symptoms - Engine Controls in SI. Determine cause of condition. Repairs, if required, are NOT covered by the labor operation codes in this bulletin. Bill repair under warranty, goodwill assistance or customer pay.
2.
Turn OFF the ignition.
3.
Open the hood.
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.
4.
Remove the throttle body and discard the throttle body gasket. Refer to Throttle Body Assembly Replacement in SI.
5.
Remove any loose debris and dirt from the throttle body assembly and the TP sensor cover. Inspect the throttle body for damage.
CautionDo not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.
6.
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.
Caution Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.