18198: Customer Satisfaction Program – Rear Axle Shaft C-Clips Missing – 2015-2018 Chevrolet Colorado & GMC Canyon

#18198: Customer Satisfaction Program – Rear Axle Shaft C-Clips Missing – (Jun 26, 2018)

Subject: 18198 — Rear Axle Shaft C-Clips Missing
Models: 2015–2018 Chevrolet Colorado
2015–2018 GMC Canyon

Reference Number: N18215893 Release Date: June 2018
Revision: 00
Attention: This program is in effect until July 31, 2020.
Make Model Model Year RPO Description
From To
Chevrolet Colorado 2015 2018
GMC Canyon 2015 2018

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2015 to 2018 model year Chevrolet Colorado and GMC Canyon vehicles may have the c-clip missing from the rear axle shaft. If the c-clip is missing, a brake squeal noise may be heard coming from the rear of the vehicle, and brake pulsation or vibration may be felt. Vehicles may experience accelerated brake pad and rotor wear.
Correction Inspect for rear axle shaft c-clip presence, install c-clip if necessary.

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18187: Customer Satisfaction Program – Brake Pedal BAS Pin Loose / Missing – 2018 Chevrolet Silverado & GMC Sierra

#18187: Customer Satisfaction Program – Brake Pedal BAS Pin Loose / Missing – (Jun 20, 2018)

Subject: Brake Pedal BAS Pin Loose / Missing
Models: 2018 Chevrolet Silverado LD, HD
2018 GMC Sierra LD, HD

Reference Number: N182165890 Release Date: June 2018
Revision: 00
Attention: This program is in effect until July 31, 2020.
Make Model Model Year RPO Description
From To
Chevrolet Silverado LD, HD 2018 2018
GMC Sierra LD, HD 2018 2018

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2018 model year Chevrolet Silverado and GMC Sierra vehicles may have been built with a BAS (Brake Apply Sensor) pin that was installed incorrectly which may enable the pin to come loose. If the pin comes loose, the power brake system would function as normal, however Check Engine and TCS (Traction Control System) tell-tales would illuminate and Service Stabilitrac and Service Trailer Braking System messages will be displayed in the driver information center. The vehicle brake lights would not illuminate for the duration of the key cycle. Once the vehicle is turned off, it will not be able to be restarted.
Correction Inspect and replace the Brake Pedal Assembly, if necessary.

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18027: Customer Satisfaction Program – Power Steering Loss of Assist – 2015 Chevrolet Colorado & GMC Canyon

#18027: Customer Satisfaction Program – Power Steering Loss of Assist – (Jun 27, 2018)

Subject: 18027 — Power Steering Loss of Assist
Models: 2015 Chevrolet Colorado
2015 GMC Canyon

Reference Number: N172115610 Release Date: June 2018
Revision: 00
Attention: This program is in effect until June 30, 2020.
Make Model Model Year RPO Description
From To
Chevrolet Colorado 2015 2015
GMC Canyon 2015 2015

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2015 model year Chevrolet Colorado and GMC Canyon vehicles may have been built with a connector between the electric power steering motor and torque sensor that has a potential for fretting corrosion. If this condition exists, power steering may be lost, and the driver may experience unanticipated increased steering effort as the vehicle reverts to manual steering. A chime will also sound in the vehicle, and a “Service Power Steering” message will appear on the Driver Information Center (DIC). Manual steering functionality will be maintained but will require additional effort, particularly at lower speeds.
Correction Dealers are to replace the complete power steering rack assembly.

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18197: Customer Satisfaction Program – Suspension Control Module Incorrect Calibration (US Only) – 2017-2018 Chevrolet Corvette

#18197: Customer Satisfaction Program – Suspension Control Module Incorrect Calibration (US Only) – (Jun 21, 2018)

Subject: 18197 — Suspension Control Module Incorrect Calibration (US Only)
Models: 2017–2018 Chevrolet Corvette

Reference Number: N182160760 Release Date: June 2018
Revision: 00
Attention: This program is in effect until July 31, 2020.
Make Model Model Year RPO Description
From To
Chevrolet Corvette 2017 2018 FE6 Suspension System-Ride, Handling, Performance, Var 1

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2017-2018 model year Chevrolet Corvette vehicles, equipped with (RPO FE6) suspension system-ride, handling, and performance, may have an incorrect service calibration for the suspension control module, which may not provide the softer, higher quality ride improvement as intended.
Correction Dealer will reprogram the suspension control module.

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18186: CSP – High Feature V6 Gen 1 Broken Piston Oil Control Ring – 2018 Buick & Chevrolet

#18186: CSP – High Feature V6 Gen 1 Broken Piston Oil Control Ring – (Jun 15, 2018)

Subject: 18186 — High Feature V6 Gen 1 Broken Piston Oil Control Ring
Models: 2018 Buick Enclave
2018 Chevrolet Impala
2018 Chevrolet Traverse

Reference Number: N182167800 Release Date: June 2018
Revision: 00
Attention: All involved vehicles that are in dealer inventory must be held and not delivered to customers, dealer traded, or used for demonstration purposes until the repair contained in this bulletin has been performed on the vehicle.

This program is in effect until June 30, 2020.

Make Model Model Year RPO Description
From To
Buick Enclave 2018 2018 LFX/LFY 3.6L Engine
Chevrolet Impala 2018 2018
Chevrolet Traverse 2018 2018

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2018 model year Buick Enclave, Chevrolet Impala and Chevrolet Traverse vehicles, equipped with a 3.6L engine (RPO LFX or LFY), may have a condition where the piston oil control ring may have been damaged during installation. If this happened, it could lead to excess oil consumption in the combustion chamber and result in an engine misfire, a check engine light, and low oil levels. If the vehicle continues to be driven with an insufficient oil level, the engine could be severely damaged and the vehicle could lose propulsion.
Correction Dealers are to inspect cylinders 2, 4, and 6. If, during inspection, the technician sees evidence of cylinder wall scoring, (gouges), or a broken oil control ring is found, dealers are to replace the engine.

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