Repair or Replace? New Program Identifies 9T65 Transmission Replacements

Repair or Replace? New Program Identifies 9T65 Transmission Replacements

A new replacement program for the 9T65 9-speed automatic transmission (RPO M3V, M3W) (Fig.1) on 2018-2020 Enclave, Traverse; 2019-2020 Blazer; 2020 Acadia, XT5, and XT6 models is being piloted in […]

June 29, 2020
Inspection/Maintenance Test DTCs Now Permanent DTCs

Inspection/Maintenance Test DTCs Now Permanent DTCs

Inspection/Maintenance Test DTCs, commonly referred to as Permanent DTCs, are codes that are currently commanding on the Check Engine MIL (Malfunction Indicator Lamp) and are stored in non-volatile memory of […]

June 29, 2020
Run Techline Connect as Admin to Receive Updates Automatically

Run Techline Connect as Admin to Receive Updates Automatically

Techline Connect, GM’s integrated Service Technician Diagnostic Scan Tool application, provides dealership service and parts personnel with access to GDS 2, Service Programming (SPS) and Service Information (SI) from a […]

June 29, 2020
Properly Lifting the Corvette

Properly Lifting the Corvette

Corvette models have required the J-43625 Lift Pad Adapters to properly lift the vehicle since the C5 generation debuted in 1997. The lift pad adapters help ensure proper vehicle weight […]

June 29, 2020
DEF Pump Unable to Build Pressure After Replacement

DEF Pump Unable to Build Pressure After Replacement

After replacing the Diesel Exhaust Fluid (DEF) pump (Fig. 9) on some 2017-2020 Colorado, Cruze, Express, Silverado 1500, Silverado 2500/3500, Canyon, Sierra 1500, Sierra 2500/3500; 2017-2019 Savana; 2018-2019 Equinox, Terrain; […]

June 29, 2020
Engine Oil Pump Pressure Control

Engine Oil Pump Pressure Control

Some 2020 Encore GX and 2021 Trailblazer models equipped with the 1.2L engine (RPO LIH) may have an illuminated Check Engine MIL and DTCs P0521 (Engine Oil Pressure Sensor Performance) […]

June 29, 2020
Quarter Panel Rattle Sound

Quarter Panel Rattle Sound

A rattle or creak sound may be heard coming from the quarter panel area while driving at highway speeds on some 2020 Corvette models. The sound may be due to […]

June 29, 2020
Removal of Corvette Z51 Spoiler

Removal of Corvette Z51 Spoiler

2020 Corvette Stingray models equipped with the Z51 Performance Package feature a rear spoiler that adds downforce to improve high-speed stability. (Fig. 15) If the Z51 spoiler is to be […]

June 29, 2020
Disabling Systems After Pickup Box Removal

Disabling Systems After Pickup Box Removal

A customer may request the pickup box and rear bumper be removed on 2019-2020 Silverado 1500 and Sierra 1500 models to install an aftermarket bed or body. (Fig. 18) If […]

June 29, 2020
Proactive Alerts – Updated Service Procedures and Warranty Information

Proactive Alerts – Updated Service Procedures and Warranty Information

Proactive Alerts, a feature of OnStar Advanced Diagnostics, are designed to help predict specific types of potential performance degradation of the battery, cables, and starter motor based on current vehicle […]

June 16, 2020
UPDATE: Vehicle Intelligence Platform Announced

UPDATE: Vehicle Intelligence Platform Announced

As the technology in new vehicles continues to evolve and expand, more electrical bandwidth and connectivity has become necessary to ensure all the data-driven features can operate efficiently together within […]

June 16, 2020
2020 Corvette TAC Action Center

2020 Corvette TAC Action Center

The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2020 Corvette Stingray. (Fig. 7) Fig. 7 TAC Action Centers are designed to gather […]

June 16, 2020
Techline Connect Now Available on the GlobalConnect App Center

Techline Connect Now Available on the GlobalConnect App Center

The GlobalConnect App Center now features a tile for Techline Connect (TLC), enabling Techline Connect to be downloaded to a Techline personal computer (PC). To access the link, select the […]

June 16, 2020
Intermittent Parasitic Battery Draw Below 40° F/4° C

Intermittent Parasitic Battery Draw Below 40° F/4° C

Several intermittent conditions related to a low battery state of charge may be found on some 2018-2019 ATS, CTS, XTS, Corvette; 2018-2020 Envision, LaCrosse, CT6, Escalade, XT5, Equinox, Impala, Malibu, […]

June 16, 2020
Front Fender and Fascia Realignment

Front Fender and Fascia Realignment

Some 2020 Corvettes may have a small paint chip in the front fascia below the headlamp on one or both sides of the vehicle. (Fig. 10) The paint chip may […]

June 16, 2020
Questions on Associated Accessories?

Questions on Associated Accessories?

Have a question about installation or need information about the warranty on Associated Accessories offered through GM Accessories? (Fig. 14) Dealerships should contact the supplier or manufacturer of the specific […]

June 16, 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 […]

June 16, 2020