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TOPIC : Chevrolet

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Brake Position Pedal Problem

This bulletin applies to 2012-2014 Chevy Tahoe vehicles that exhibit unwanted grade braking, low power and/or a busy-shifting transmission. These issues may be caused by the BPP (brake pedal position) sensor not being learned correctly in the ECM.

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Don’t Get Fooled by Color

When servicing the 6T30/40/45/50 automatic transmission in a 2012 Chevy Orlando, a technician may note that the ATF has a very dark appearance, almost as if the fluid has been overheated or the clutches inside the transmission are distressed.

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Bumpy Downshift

This bulletin applies to 2014 Chevy Impala vehicles equipped with the 6T70 automatic transmission. Some owners may complain about a coast-down “bump” felt with closed throttle during a 4-3 downshift.

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Low Oil Pressure at Idle

Anyone who works on later model Chevy vehicles is already aware of the engine oil filter replacement procedure that involves changing the filter element instead of a self-contained filter housing unit. Some customers may comment on the low oil pressure light coming on or flashing on and off at idle. This may be caused by oil pressure being bled off due to debris in the oil drain check valve and/or a distorted/smashed filter element.

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Chevy Fans are Finicky

Owners of 2013 Chevy Impala vehicles may comment that the cooling fans do not run or that the fans run with the key off. This may be caused by sticking fan relays or cooling fan motors drawing too much amperage, sticking and causing damage to the relays and accessory wiring block.

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Shifty Chevy

Some owners of 2011-2014 Chevy Silverado 2500/3500 trucks equipped with the Allison A1000 automatic transmission may experience a bump feeling and/or a clunk noise when shifting from drive to reverse. Harsh shifting into reverse may be involved as well.

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Chevy 4WD

Some owners of 2004-2012 Chevy Colorado 4WD trucks may comment on a “Service 4 Wheel Drive” message displayed in the DIC (driver’s information center). Technicians may find DTC C0327 stored in current or history in the TCCM.

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One Spring Too Many

This bulletin applies to 2007-2012 Chevy Colorado 4WD vehicles equipped with 4L60E/4L65E/4L70E automatic transmissions. The concern may involve a hard or harsh 1-2 shift after transmission service.

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Wet Chevy Switch

This bulletin applies to 2013 Chevy Equinox and GMC Terrain vehicles, built before 9/6/2012. Customers may comment on any one of the following conditions:

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Chevy Trax Terminals

This bulletin applies to 2013 Chevy Trax vehicles, where a service brake assist message is shown, along with DTC C025E Symptom 5A set. 

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