November 2021 – TechLink

SiriusXM with 360L Connectivity

The optional SiriusXM with 360L service on some 2021 and later GM models equipped with an Infotainment 3.X system (RPO IOS, IOT, IOU, IOV) features over 200 internet channels (IP […]

November 30, 2021 —

Next Generation dexos1 Gen 3 Engine Oil Now Available

dexos™1 Gen 3 is the latest generation of GM-certified engine oil. The recently introduced engine oil specification addresses the challenge of meeting the needs of new engine hardware — in […]

November 30, 2021 —

Short Range Radar Conditions in Highly Reflective Environments

Some 2021 Tahoe, Suburban, Yukon and Escalade models equipped with the Reverse Automatic Braking system (RPO UVZ) may have a Service Driver Assist message displayed on the Driver Information Center […]

November 30, 2021 —

Turbocharger Wastegate Linkage Wear

Some 2019-2022 Encore GX and Trailblazer models equipped with the 1.2L engine (RPO LIH) may have an illuminated Check Engine MIL with DTC P0299 (Engine Underboost) set. These conditions may […]

November 30, 2021 —

Poor Performance During High Ambient Temperatures

Some 2016-2020 Express and Savana models equipped with the 6.0L V8 engine (RPO L96, LC8) may have a lack of power or poor performance when driving up grades or after […]

November 30, 2021 —

Fleet Vehicle Aftermarket Calibrations may Limit Vehicle Speed, Reduce Engine Power, and Cause Vibration at Idle

Vehicle speed may be limited to 70 mph (112 km/h) on some 2015-2021 Colorado and Canyon models equipped with the 2.5L engine (RPO LCV)) that are fleet vehicles. Some vehicles […]

November 30, 2021 —

Transmission Neutral Service Mode

2021-2022 CT4, CT5, Escalade, Tahoe, Suburban and Yukon models equipped with the 10L60 10-speed automatic transmission (RPO MQA) or 10L80 10-speed automatic transmission (RPO MHS, MQC) feature an internal Electronic […]

November 30, 2021 —

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

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

The latest GDS2 core update release (v22.2.05000) includes an update to the J2534 Wrapper, or MDI tool selection window. Since the MDI no longer receives updates to its core software, […]

November 23, 2021 —

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

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

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

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

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

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 —