TechLink – Page 58

HVAC Afterblow Feature Enabled at the Factory

The Afterblow feature is now enabled from the factory on 2021 Acadia (Fig. 12), Blazer, Bolt EV, XT5 and XT6 models. Previously, the Afterblow feature was disabled when the vehicle […]

October 28, 2020 —

Misfire and Engine Noise Condition

Some 2020 Silverado, Sierra; 2020-2021 Camaro; 2021 Corvette, Tahoe, Suburban, Yukon, and Escalade models equipped with the 5.3L engine (RPOs L82, L84), 6.2L engine (RPOs L87, LT1, LT4, LT2), or […]

October 28, 2020 —

Excessive Load on Trailer Running Lamps

The trailer running lamps may illuminate momentarily and then turn off or may flash when connected to 2019 Silverado 1500 and Sierra 1500 models. When operating a trailer running lamp […]

October 28, 2020 —

DTC P2101 Set in History

DTC P2101 (Throttle Actuator Position Performance) may be set in history on some 2020-2021 CT5 models equipped with the 2.0L engine (RPO LSY). If DTC P2101 is set, complete all […]

October 28, 2020 —

Tapping Sound from Engine

Some 2020-2021 Encore GX and 2021 Trailblazer models equipped with the 1.3L engine (RPO L3T) may have a tapping sound coming from the engine that may sound similar to a […]

October 28, 2020 —

Diagnosing Inoperative Gauges, Communication Concerns Setting DTCs

Some 2017-2018 Silverado, Sierra; 2017-2020 Tahoe, Suburban, Yukon, Escalade; 2019 Silverado LD, Silverado 2500/3500, Sierra Limited, Sierra 2500/3500; and 2019-2020 Silverado 4500HD/5500HD/6500HD models may have several communication concerns resulting in […]

October 28, 2020 —

DTCs Set in the TCM

Some 2020 Corvettes may have an illuminated Check Engine MIL and a reduced engine power message on the instrument cluster with no noticeable performance issues. DTCs P1967 (Serial Data Message […]

October 28, 2020 —

Battery Condition Prognostics Integrated into Techline Connect

Techline Connect, GM’s next generation diagnostic application, has released a new tool to help determine the condition of a vehicle’s battery. Battery Condition is determined using “Power of Green;” a […]

October 19, 2020 —

New GM Global Electronic Parts Catalog Release Offers Multiple Enhancements, Search Functions

A new version of the GM Global Electronic Parts Catalog (EPC) will be released on October 17, 2020 with a number of enhanced features and functionality. (Fig. 1) The Q.link™-supported […]

October 13, 2020 —

New Rear Seat Media System Offers a Choice of HD Entertainment, Headphone Options

The Rear Seat Media system available in the new 2021 Tahoe, Suburban, Yukon, and Escalade offers high-definition entertainment using two touchscreen displays and two infrared headsets. (Fig 8) Rear seat […]

October 13, 2020 —

3rd-Row Headrest Service Kit

After cycling a 3rd-row seat to the up position on some 2021 Tahoe, Suburban and Yukon models, the headrest may not return to or stay in the upright position. In […]

October 13, 2020 —

Loose Turbocharger Actuator Bolts

Some 2020-2021 Silverado and Sierra models equipped with the 3.0L turbocharged Duramax diesel engine (RPO LM2) may exhibit a lack of performance along with DTCs P003A (Turbocharger Boost Control Position […]

October 13, 2020 —

Potential Oil Leak from Camshaft Carrier Gasket

A potential oil leak from the camshaft carrier gasket may be found on some 2019 CT6; 2019-2021 XT4; 2020-2021 Acadia, Blazer, CT4, CT5, XT5 and XT6 models equipped with the […]

October 13, 2020 —

Particulate Matter Sensor Protection Tube Performance Diagnostic Setting False DTC

The particulate matter sensor protection tube performance diagnostic may set a false DTC P1488 (Particulate Matter Sensor Temperature Circuit High Voltage) on some 2020 Silverado and Sierra trucks equipped with […]

October 13, 2020 —