#PIP4112R: Normal Characteristic - Sag Or Hesitation On Acceleration - (Mar 24, 2017)

Subject: Normal Characteristic - Sag Or Hesitation On Acceleration

Brand: Model: Model Year: VIN: Engine: Transmission:
from to from to
Buick Enclave 2008-2012 All All All All
Buick LaCrosse 2010-2011 All All All MH7
Buick LaCrosse 2010-2013 All All All MH2, MH4
Buick Regal 2011 All All All MH7
Cadillac XLR 2006 - 2009 All All All All
Cadillac XLR-V 2006 - 2009 All All All All
Cadillac STS 2006-2011 All All All All
Cadillac STS-V 2006 - 2011 All All All All
Cadillac SRX 2007-2012 All All All All
Cadillac Escalade Models 2007-2017 All All All All
Cadillac CTS 2008-2017 All All All All
Cadillac CTS-V 2008 - 2017 All All All All
Cadillac ATS 2013-2017 All All All All
Cadillac ATS-V 2013 - 2017 All All All All
Cadillac CT6 2016-2017 All All All All
Chevrolet Corvette 2006-2017 All All All All
Chevrolet Avalanche 2007-2013 All All All All
Chevrolet Silverado 2007-2017 All All All All
Chevrolet Suburban 2007-2017 All All All All
Chevrolet Tahoe 2007-2017 All All All All
Chevrolet Colorado 2015-2017 All All All All
Chevrolet Malibu 2008-2011 All All All MH8
Chevrolet Malibu 2008-2013 All All All MH2
Chevrolet Equinox 2008-2012 All All All MH2, MH4
Chevrolet Equinox 2009-2011 All All All MHC, MH7
Chevrolet Traverse 2009-2012 All All All All
Chevrolet Cruze 2011 All All All All
Chevrolet Captiva Sport 2012 All All All MHJ, MHK
Chevrolet Orlando 2012 All All All All
Chevrolet Sonic 2012 All All All MH9
Chevrolet Impala 2012-2013 All All All All
Chevrolet SS 2014 All All All All
GMC Sierra 2007-2017 All All All All
GMC Yukon Models 2007-2017 All All All All
GMC Canyon 2015-2017 All All All All
GMC Acadia 2008-2012 All All All All
GMC Terrain 2010-2012 All All All MH2, MH7
GMC Terrain 2010-2011 All All All MHC, MH7
GMC Savana 2010-2017 All All All All
Hummer H2 2008-2011 All All All All
Pontiac G6 2007-2010 All All All MH2
Pontiac G6 2009-2010 All All All MH8
Pontiac G8 2008-2009 All All All All
Pontiac Torrent 2008-2009 All All All MH2, MH4
Saturn Aura 2007-2009 All All All MH2
Saturn Aura 2009 All All All MH8
Saturn Outlook 2008-2010 All All All MH2, MH4
Saturn Vue 2008-2010 All All All MH2, MH4
*Excludes vehicles equipped with Diesel Engines
Supersession Statement
This PI was superseded to update models and models years. Please discard PIP4112Q.
<dl><dt>Correction</dt><dd>Some customers may comment on a sag or hesitation when accelerating under the following conditions:
When coasting at low speeds of less than 15 miles per hour with a closed throttle and then aggressively applying the throttle.
Examples of this maneuver include a rolling stop or a lane change maneuver. In this type of maneuver, even though the accelerator is applied aggressively, the throttle blade is opened slowly for up to 0.7 seconds to help minimize drive-line lash and clunking.
Also in a vehicle equipped with a six speed automatic transmission when making a hard, complete stop with a closed throttle, immediately followed by an aggressive throttle opening the transmission down-shifts may not be completed by the time the throttle is opened.
As a result approximately 0.5 seconds of ″zero″ torque may be commanded to allow the shift to first gear to occur.
Recommendations / InstructionsBoth of the above conditions are a result of Torque Management and both of these conditions should be considered normal and no repairs should be attempted.
Please follow this diagnostic or repair process thoroughly and complete each step.
If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
</dd></dl>Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.