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September 16, 2015 Service bulletin

Electrical system: starter assembly

Chevrolet technical service bulletin PIP4112Q for 2008-2013 Chevrolet Malibu, 2007-2011, 2014 Chevrolet Silverado 1500 and 2012-2013 Chevrolet Impala and others.

Bulletin number
PIP4112Q
Component
Electrical system: starter assembly
Summary
This Preliminary Information communication provides information to the technician of a complaint of a sag or hesitation when accelerating. The concern is present when coasting at low speeds of less than 15 miles per hour and then aggressively applying the throttle, or after making a hard stop followed by an aggressive throttle. This is considered normal operation of the vehicle the throttle is delayed and opened slowly up to .7 seconds to help minimize driveline lash and clunking or will have approximately .5 seconds of zero torque to allow the transmission to shift to first gear.

Owners of these vehicles have filed 8,354 complaints in the electrical category.

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