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Chevy Impala

This is simply an FYI regarding 2019 and later Chevy Impala vehicles built at the Oshawa assembly plant after Feb. 1, 2019, and the Detroit-Hamtramck plant after Feb. 2, 2019.

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U-Code Misdiagnosis

This bulletin applies to all Chevy Impala vehicles built from 2013-2018, when diagnosing multiple DTCs, one of which includes U****Byte 71. Any control module may set a DTC for one of its inputs, and that data is shared across the communication bus for other modules to perform their respective functions.

Internal Mode Switch Glitch

This bulletin applies to 2009-2017 Chevy Equinox, Impala, Malibu and Traverse vehicles equipped with an automatic transmission. The MIL may be on and DTC P182E may be set as active or history in the transmission control module. The customer may also note that there is no PRNDL display.

Bad Rear Calipers

This bulletin applies to a host of GM vehicles including 2018-2019 Buick LaCrosse and Regal, Cadillac XTS, Chevy Bolt EV, Cruze, Equinox, Impala, Malibu and Volt and GMC Terrain.

GM Caliper Recall

GM has announced a recall for certain 2018-2019 vehicles including Chevy Equinox, Bolt EV, Cruze, Impala, Malibu, and Volt, Buick Regal and LaCrosse, Cadillac XTS and GMC Terrain, built from March 2018 to July 2018.

No Shift Display

This bulletin applies to 2009-2018 Chevy Impala models equipped with automatic transmissions. Some customers may comment that the MIL lamp is on. In “rare” cases, they may also note that there is no PRNDL display.

Too Much E85?

This bulletin applies to a number of GM products including 2013-2015 Cadillac ATS/2012-2015 SRX, 2012-2017 Buick LaCrosse/Regal/Verano, 2012-2017 Chevy Caprice, 2016-2018 Captiva/ 2011-2017 Equinox/2012-2018 Impala and 2011-2017 GMC Terrain.

Chevy Oil Leak Fix

This bulletin applies to 2013 – 2019 Chevy Malibu vehicles equipped with a 2.5L or 2.0L engine. The same engines are available in a number of GM vehicles including Buick Envision and Regal, Cadillac CTS, ATS and CT6, Chevy Camaro, Equinox, Impala and Traverse and GMC Acadia, Canyon and Terrain.

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.

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.