Use the Pre-Repair Authorization Process for Quick Warranty Approval

Use the Pre-Repair Authorization Process for Quick Warranty Approval

Warranty replacement of wheels, seat covers and cushions, outside mirror assemblies, steering wheels, and interior door trim requires GM pre-authorization before repairs are made (U.S.). The Pre-Repair Authorization (RPA) process […]

February 27, 2020
Special Tools Software Update Download Process

Special Tools Software Update Download Process

The Active Fuel Injector Tester (AFIT), R1234yf A/C Machine, Pico Scope NVH Tool, and TPMS and RF Tool are just a few of the special service tools that require occasional […]

February 27, 2020
Torque Converter Fluid Seal Leak

Torque Converter Fluid Seal Leak

Fluid may be noticed leaking from the front of some 2019 XTS, Impala and Acadia models equipped with the 6T70, 6T75 or 6T80 automatic transmission (RPO MHM, M7U, M7W, M7V). […]

February 27, 2020
Flex Plate and Starter Motor Damage

Flex Plate and Starter Motor Damage

Some 2019-2020 Blazer, Impala and Acadia models equipped with the 2.5L 4-cylinder engine (RPO LCV) and 2019-2020 Equinox and Terrain models equipped with the 2.0L 4-cylinder engine (RPO LTG) may […]

February 27, 2020
Loss of Audio or Abnormal Speaker Operation

Loss of Audio or Abnormal Speaker Operation

There may be several audio conditions, including loss of audio, loss of chime, loss of turn signal indicator sound, low or no audio from a speaker channel, or abnormal speaker […]

February 27, 2020
Safety Alert Seat Lane Departure Warning Inoperative

Safety Alert Seat Lane Departure Warning Inoperative

Some 2016-2019 Envision models may have a Service Driver Assist message displayed on the Driver Information Center along with an inoperative Lane Departure Warning actuator in the Safety Alert Seat […]

February 27, 2020
Vehicle Systems Work Together to Deliver Trailering App Functionality

Vehicle Systems Work Together to Deliver Trailering App Functionality

The Advanced Trailering System available on the 2019-2020 Silverado 1500 and 2020 Silverado HD (Fig. 18) and the ProGrade Trailering System available on the 2019-2020 Sierra 1500 and 2020 Sierra […]

February 27, 2020
Trailering App Trailer Connection and Lighting Diagnosis Update

Trailering App Trailer Connection and Lighting Diagnosis Update

The new trailering app (RPO U1D) (Fig. 23) available on the 2019-2020 Silverado 1500 and Sierra 1500 and the 2020 Silverado HD and Sierra HD uses the K68 Trailer Lighting […]

February 27, 2020
Easier-to-Use Service Information Consolidates Information and Reduces Links

Easier-to-Use Service Information Consolidates Information and Reduces Links

Technicians using the GM Service Information (SI) will soon find updated Removal/Installation and Replacement procedures (Fig. 1) with more detailed steps and fewer procedure links to other SI documents. The […]

February 13, 2020
MDI 2 Required for Next Generation Digital Vehicle Platform

MDI 2 Required for Next Generation Digital Vehicle Platform

The Next Generation Digital Vehicle Platform, GM’s all-new electronic platform that will power the next generation of GM models and systems, including electric vehicles, active safety systems, infotainment systems, and […]

February 13, 2020
Bolt EV Wiring Harness Connection

Bolt EV Wiring Harness Connection

Some 2017-2020 Bolt EV models may have a loss of propulsion, an illuminated Malfunction Indicator Lamp (MIL) and DTCs P0A3F (Drive Motor Position Sensor Circuit) and/or P1B03 (Drive Motor Position […]

February 13, 2020
New 2020 GM STC Course Catalog Now Available

New 2020 GM STC Course Catalog Now Available

The new 2020 GM Service Technical College (STC) Course Catalog (Fig. 12) is now available on the Service Technician Training, Recruiting, Retention, and Recognition App on GlobalConnect and on GMSTC.com. […]

February 13, 2020
Power Folding Trailer-Tow Mirror Movement

Power Folding Trailer-Tow Mirror Movement

The optional trailer-tow mirrors on 2020 Silverado HD and Sierra HD models feature a power folding function (RPO DWI) and an available power extending function (RPO DZC), which makes it […]

February 13, 2020
SiriusXM Radio ID on 2020 Infotainment 3 Systems

SiriusXM Radio ID on 2020 Infotainment 3 Systems

For 2020 Silverado 1500, Silverado 2500HD/3500HD, Traverse, Acadia, Sierra 1500, Sierra 2500HD/3500HD, XT4, XT5, and XT6 models equipped with Infotainment 3 systems (RPO IOR, IOS, IOT, IOU), technicians may no […]

February 13, 2020
TechPRO Professional Aftermarket Diagnostic Application Free Trial

TechPRO Professional Aftermarket Diagnostic Application Free Trial

GM Customer Care and Aftersales recently introduced the MAHLE TechPRO Professional Aftermarket Diagnostics application for diagnosing non-GM vehicles in U.S. dealerships’ used car departments and collision repair centers. (Fig. 16) […]

February 13, 2020
Cold Weather Power Steering Hose Upgrade Kit

Cold Weather Power Steering Hose Upgrade Kit

2015-2020 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks driven regularly in extreme cold climates may require use of upgraded power steering hoses. Extreme cold may affect the pliability of the power […]

February 13, 2020
GM Service Know-How Emerging Issues

GM Service Know-How Emerging Issues

The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM certified repairs. The latest service topics from GM Brand Quality and Engineering covered in […]

February 13, 2020