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Service Bulletin: #PIP4112R: Normal Characteristic - Sag Or Hesitation On Acceleration

Rob

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[h=3]#PIP4112R: Normal Characteristic - Sag Or Hesitation On Acceleration - (Mar 24, 2017)[/h]
Subject: Normal Characteristic - Sag Or Hesitation On Acceleration

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</tbody>

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

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</tbody>
*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.
 

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