Archive for September, 2021

Updated 9T65 Transmission Diagnosis Guidelines – Tips from the Replacement Pilot Program

Updated 9T65 Transmission Diagnosis Guidelines – Tips from the Replacement Pilot Program

The 9T65 9-speed automatic transmission (RPO M3V, M3W) replacement pilot program (U.S.) for the 2018-2022 Enclave, Traverse; 2019-2022 Blazer; and 2020-2022 Acadia, XT5, and XT6 models concluded on September 30, […]

September 30, 2021
Program Radio Updates Following the Bulletin Procedures

Program Radio Updates Following the Bulletin Procedures

When completing the programming procedures for updating the infotainment system software on vehicles equipped with an Infotainment 3 system (RPO IOR, IOS, IOT, IOU, IOV), SPS (Service Programming System) and/or […]

September 30, 2021
Resetting a Mobile Device for Connectivity Issues

Resetting a Mobile Device for Connectivity Issues

Concerns about mobile device connections – Apple and Android –on a vehicle equipped with an Infotainment 3 system (RPO IOR, IOS, IOT, IOU, IOV) can be difficult to reproduce and […]

September 30, 2021
Thermal Bypass Valve Installation

Thermal Bypass Valve Installation

When performing transmission repairs on 2016-2019 Silverado and Sierra models and 2015-2020 Tahoe, Suburban and Yukon models equipped with the 6L80 6-speed automatic transmission (RPO MYC) for harsh shift, delayed […]

September 30, 2021
Shudder Condition When Coasting to a Stop

Shudder Condition When Coasting to a Stop

Some 2021 Silverado 1500 and Sierra 1500 trucks equipped with the 5.3L V8 (RPO L84) and 10L80 10-speed automatic transmission (RPO MQB), excluding models with RPO YK9, may have a […]

September 30, 2021
Diagnostic Charge Battery Station Software Update

Diagnostic Charge Battery Station Software Update

A new software update (DCAG1-33-24) is now available for the EL-52800 Diagnostic Charge Battery Station (DCBS). (Fig. 12) All DCBS units should be updated to the latest software version to […]

September 30, 2021
Pop Sound on Heavy Acceleration with Multiple DTCs Set

Pop Sound on Heavy Acceleration with Multiple DTCs Set

A pop sound may be heard under heavy acceleration on some 2021-2022 Encore GX and Trailblazer models equipped with the 1.2L engine (RPO LIH). In addition, one or more of […]

September 30, 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 […]

September 30, 2021
Preventing Inadvertent Airbag Deployments

Preventing Inadvertent Airbag Deployments

When making vehicle repairs to or near the Supplemental Inflatable Restraint (SIR) system, technicians always need to consider the consequences. Even during repairs to components that are not directly connected […]

September 24, 2021
Convertible Top Front Latch Striker Adjustment

Convertible Top Front Latch Striker Adjustment

The convertible top may not lower intermittently on some 2020-2021 Corvettes. DTC B19E4 (Hard Top Locked Closed Signal) SYM64 also may stored in history. SYM64 indicates that the folding top […]

September 24, 2021
Inoperative Door Locks with Various Communication DTCs Set

Inoperative Door Locks with Various Communication DTCs Set

The door locks may become inoperative and several communication DTCs (U codes) may set on some 2020-2021 Acadia, XT5 and XT6 models. Other conditions that may occur include illuminated instrument […]

September 24, 2021
Front Seat Adjuster Track Assembly Available as Service Part

Front Seat Adjuster Track Assembly Available as Service Part

Diagnosing front seat movement conditions on 2016-2022 Malibu and 2019-2022 XT4 models requires verifying the operation of the seat adjuster track. If there are issues with fore/aft movement, binding or […]

September 24, 2021
Check for Required Calibrations before Installing GM Accessories

Check for Required Calibrations before Installing GM Accessories

After installing a number of select GM Genuine Accessories (Fig. 16), a calibration update from the Techline Customer Support Center (TCSC) is required in order to complete the installation properly. […]

September 24, 2021
Limited or Reduced Propulsion Power Messages

Limited or Reduced Propulsion Power Messages

Some 2016-2019 Volt models may display a Speed Limited to X MPH or Reduced Propulsion Power message on the Driver Information Center (DIC) and limited vehicle propulsion. (Fig. 18) These […]

September 24, 2021