Archive for April, 2017

Misdiagnosis of Returned Turbochargers

Misdiagnosis of Returned Turbochargers

All turbochargers that are returned to the Warranty Parts Center (WPC) are inspected by GM Engineering for root cause failure. Many of the turbochargers from 2011-2016 Cruze, 2012-2018 Sonic, 2013-2018 […]

April 12, 2017
Diagnosing Communication U Codes before Replacing Parts

Diagnosing Communication U Codes before Replacing Parts

If the Driver Information Center (DIC) displays a “Steering Assist Reduced” message on a vehicle that comes into the dealership for service, it makes sense to check the steering components, […]

April 12, 2017
Speedometer Indicates Lower Speed than Vehicle is Traveling

Speedometer Indicates Lower Speed than Vehicle is Traveling

The speedometer reading may be inaccurate on some 2015-2017 Express, Savana, Silverado, Sierra, Tahoe, Suburban, Yukon, and Escalade models. (Fig. 7) The speedometer may indicate a lower mph than the […]

April 12, 2017
Improper Engine Gasket Cleaning Methods Using Surface Conditioning Discs

Improper Engine Gasket Cleaning Methods Using Surface Conditioning Discs

When cleaning engine gasket sealing surfaces or cleaning parts from an engine that are to be reused, it’s critical to not use surface conditioning discs, such as abrasive pads or […]

April 12, 2017
Loose Charge Air Cooler Ductwork

Loose Charge Air Cooler Ductwork

Loose connections of the charge air cooler ductwork on some 2017 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P) may result in an illuminated Check […]

April 12, 2017
Engineering Information Bulletins and Part Restrictions

Engineering Information Bulletins and Part Restrictions

April 12, 2017
New Colorado ZR2 Takes Off-Roading to New Heights

New Colorado ZR2 Takes Off-Roading to New Heights

The new 2017 Colorado ZR2 (Fig. 1) is designed to excel off-road, whether that’s tackling out-of-the-way two-tracks, technical rock crawling, or desert running. At its introduction, the ZR2 boasts more […]

April 5, 2017
A Salute to TechLink Contributor Dave Nowak

A Salute to TechLink Contributor Dave Nowak

Meticulous may be the best way to describe Dave Nowak. Everything he had a hand in was detailed, thoughtfully planned out, and developed with a keen understanding of how the […]

April 5, 2017
Top Questions on 2018 Equinox

Top Questions on 2018 Equinox

The Chevrolet Equinox is an all-new model for 2018 with a variety of new features that may be unfamiliar to some customers. As a result, customers may bring their vehicle […]

April 5, 2017
Passenger Presence System Service Kit

Passenger Presence System Service Kit

When diagnosing a failed Passenger Presence System (PPS) pressure sensor on current models of the Buick Cascada, Envision, LaCrosse; Chevrolet Bolt, Camaro, Colorado, Corvette, Cruze, Malibu, Silverado, Spark, Suburban, Tahoe; […]

April 5, 2017
UPDATE: Quick Learn Procedures for Programming 2017MY Keys and Key Fobs

UPDATE: Quick Learn Procedures for Programming 2017MY Keys and Key Fobs

New for 2017 model year vehicles, two keys that are already programmed or two previously learned Remote Keyless Entry (RKE) transmitters (key fobs) need to be present in order to […]

April 5, 2017
Spin-On Oil Filter Replacement

Spin-On Oil Filter Replacement

The correct match of oil filter to engine application is more important now than ever with the tight tolerances, two stage oil pumps and high flow lubrication requirements of today’s […]

April 5, 2017
Service Know-How

Service Know-How

10217.05V – Emerging Issues May 11, 2017   The latest service topics from Brand Quality and Engineering are reviewed, including servicing full-size truck camper mirrors (Fig. 21) and headliner repairs […]

April 5, 2017