P2135 Chevy

P2135 Chevy reduced engine power

GM has issued a service bulletin 11-06-04-007C to address a P2135 Chevy reduced engine power trouble in the vehicles listed below. code. A P2135 code is set if the PCM detects a difference between throttle position sensor 1 and throttle position sensor 2 and the difference lasts longer than 2 seconds. This is normally caused by a faulty electronic throttle body. However, in this case GM advises NOT to immediately replace the throttle body. The service bulletin lays out a very detailed method to recalibrate the throttle body which can save you a LOT of money. The bulletin is way too long and detailed to list here and it includes photos that I cannot legally reproduce. If you have this code and own one of the vehicles listed below, buy a short subscription to eautorepair.net or see if your local library offers access to manufacturers’ service bulletins.

The P2135 service bulletin applies to these vehicles:

2008-2011 Cadillac Escalade Models

2009-2011 Cadillac Escalade Two-Mode Hybrid

2008-2009 Chevrolet TrailBlazer

2008-2011 Chevrolet Avalanche, Colorado, Express, Silverado, Suburban, Tahoe

2008-2011 Chevrolet Tahoe Two-Mode Hybrid

2009-2011 Chevrolet Silverado Two-Mode Hybrid

2008-2009 GMC Envoy

2008-2011 GMC Canyon, Savana, Sierra, Sierra Denali, Yukon Models

2008-2011 GMC Yukon Two-Mode Hybrid

2009-2011 GMC Sierra Two-Mode Hybrid

2008-2009 HUMMER H2

2008-2010 HUMMER H3

Equipped with Engine RPO LFA, LY2, L20, LMG, LC9, LH6, LMF, LH8, LH9, L76, LS2, LY5, LY6, L92, L96, LZ1, L94 or L9H