TechLine Connect Software Update Adds New Direct Launch Programming Functionality

TechLine Connect Software Update Adds New Direct Launch Programming Functionality

The November Techline Connect (TLC) software update introduces “Direct Launch” capability to simplify any service programming related to Field Actions. Direct Launch functionality is designed to improve first time quality […]

November 23, 2021
Poor Splice Connection in 1.2L Engine Wiring Harness

Poor Splice Connection in 1.2L Engine Wiring Harness

A poor splice connection in the engine wiring harness on some 2020-2021 Trailblazer and Encore GX models equipped with the 1.2L engine (RPO LIH) may result in an illuminated Check […]

November 23, 2021
GDS2 Update Includes New MDI Tool Selection Window

GDS2 Update Includes New MDI Tool Selection Window

Wrapper, or MDI tool selection window. Since the MDI no longer receives updates to its core software, changes are being made to the MDI Manager and the MDI tool selection […]

November 23, 2021
New Dealer Infrastructure & Security Guidelines Released for 2022

New Dealer Infrastructure & Security Guidelines Released for 2022

GM has recently released new Dealer Infrastructure & Security Guidelines (DISG) for 2022. The new guidelines outline the dealership technology needed to ensure reliable data communications for all dealers, including […]

November 23, 2021
Driver’s Outside Rearview Mirror Appearance

Driver’s Outside Rearview Mirror Appearance

The driver’s outside rearview mirror on some 2020-2022 Corvettes may have poor operation and appearance, including numerous lines shown in the mirror and a dim reflection at all times. (Fig. […]

November 23, 2021
DTCs Set Due to Transmission Fluid Pump Fuse

DTCs Set Due to Transmission Fluid Pump Fuse

automatic transmission (RPO MRG) may have an illuminated Check Engine MIL and/or the engine stop/start feature may be inoperative. DTC P2796 (Auxiliary Transmission Fluid Pump Control Circuit) and DTC P2798 (Auxiliary […]

November 23, 2021
Charge Air Cooler Icing During Extreme Cold Weather

Charge Air Cooler Icing During Extreme Cold Weather

When driving in extreme cold weather conditions (0°F or less / -18°C or less), a winter grille cover should be installed on 2019-2022 XT4 models equipped with the 2.0L turbo […]

November 23, 2021
Driver Assistance Systems Disabled due to Incorrect Tire Size

Driver Assistance Systems Disabled due to Incorrect Tire Size

The Lane Keep Assist and Forward Collison Alert systems may become inoperative on some 2020-2022 Encore GX and 2021-2022 Trailblazer models. While driving, the Lane Keep Assist and vehicle detection […]

November 23, 2021
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 […]

November 23, 2021
Engine Wiring Harness Chafing Repairs

Engine Wiring Harness Chafing Repairs

Several engine wiring harness chafing conditions may be found on some 2019-2021 Silverado and Sierra models as well as some 2021 Tahoe, Suburban, Yukon and Escalade models. Depending on the […]

October 30, 2021
Insufficient Heating Performance Due to Exhaust Manifold Outlet Pipe

Insufficient Heating Performance Due to Exhaust Manifold Outlet Pipe

Some 2020-2021 Encore GX and Trailblazer models equipped with the 1.3L turbo engine (RPO L3T) may have insufficient heat or no heat in the cabin after driving for several minutes. […]

October 30, 2021
HVAC Temperature Actuator Operation at Low Temperatures

HVAC Temperature Actuator Operation at Low Temperatures

The Check Engine MIL may be illuminated on some 2020-2021 CT4 models equipped with the 2.0L engine (RPO LSY) or 2.7L engine (RPO L3B) and some 2020-2021 CT5 models equipped […]

October 30, 2021
CSMT Mobile App Update and Job Aids

CSMT Mobile App Update and Job Aids

New resources are now available to U.S. dealerships for help with submitting or reworking warranty approval requests using the Pre-Repair Authorization (PRA) application (Fig. 13) in the Certified Service Mobile […]

October 30, 2021
Service Leveling System Message Due to Aftermarket Modifications

Service Leveling System Message Due to Aftermarket Modifications

A Service Leveling System message or Speed Limited message on the Driver Information Center (DIC) on some 2021 Tahoe, Suburban, Yukon and Escalade models may be due to aftermarket modifications. […]

October 30, 2021
Dipstick Tube O-Ring Oil Leak

Dipstick Tube O-Ring Oil Leak

When diagnosing engine oil leaks on 2019-2022 Silverado, Sierra; and 2020-2022 CT4-V models equipped with the 2.7: turbocharged 4-cylinder engine (RPO L3B) (Fig. 22), inspect the dipstick tube (indicator tube) […]

October 30, 2021