TSBs covering the issue of REP in LS Throttle Bodies

MRRSM

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For Owners of a variety of Models for the GM Full Size Vehicles with LS Motors from 2008-2011, these two TSBs cover the problems occurring of having Rough Running conditions or Reduced Engine Power before servicing the Throttle Body with an Updated Repair kit. The 'How To' images and instructions are worth the read for anyone suffering with inexplicable REP issues or when experiencing these events:

CONDITION:

On some 2008-2009 Chevrolet TrailBlazer; GMC Envoy; HUMMER H2; 2008-2011 Cadillac Escalade, Escalade ESV, Escalade EXT; Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe; GMC Savana, Sierra, Yukon, Yukon XL; 2008-2010 HUMMER H3; 2009-2011 Chevrolet Colorado; GMC Canyon; and 2009-2010 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.

https://static.nhtsa.gov/odi/tsbs/2013/SB-10047220-6622.pdf

https://static.nhtsa.gov/odi/tsbs/2012/SB-10044229-8347.pdf
 

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