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 […]

October 13, 2020
Proper Terminal Testing and Diagnosis

Proper Terminal Testing and Diagnosis

Damage to electrical terminals can lead to inaccurate test results, difficult diagnosis and system failures. When servicing a suspected wire/terminal issue, be sure to check for the following conditions: Any […]

September 30, 2020
Tips for Installing LPO Accessory Wheels

Tips for Installing LPO Accessory Wheels

When installing Limited Production Option (LPO) accessory wheel kits sourced from your local ADI (Fig. 4), a TPMS (Tire Pressure Monitoring System) learn is required as part of the wheel […]

September 30, 2020
Returning LPO Transit Wheels

Returning LPO Transit Wheels

When GM dealerships (U.S.) order new vehicles with Limited Production Option (LPO) accessory wheel kits, the vehicles will arrive at the dealership equipped with transit wheels. The LPO wheels (Fig […]

September 30, 2020
Camaro 1LE Vinyl Hood Wrap Update

Camaro 1LE Vinyl Hood Wrap Update

All 2017–2021 Camaro 1LE models feature a vinyl hood wrap that is applied before the cars arrive at the dealership. (Fig. 10) Several procedures should be followed to clean the […]

September 30, 2020
Delayed Transmission Engagement

Delayed Transmission Engagement

Some 2018-2019 ATS, CTS, CT6, Corvette; 2018-2020 Express; 2018-2021 Camaro, Colorado, Silverado, Canyon, Savana, Sierra; and 2021 CT4 models equipped with the 8L45 or 8L90 8-speed automatic transmission (RPO M5T, […]

September 30, 2020
The Importance of Using the Correct Fasteners

The Importance of Using the Correct Fasteners

Using the correct fastener in a given location can’t be stressed enough when performing repairs on today’s modern vehicle designs. Here’s an example why. A recent analysis of an air […]

September 30, 2020
DTC P0708 Set in the Transmission Control Module

DTC P0708 Set in the Transmission Control Module

Some 2020 CT4, Camaro, Escalade, Tahoe, Suburban, Yukon, Silverado 1500, Sierra 1500, Express, and Savana models equipped with an 8L45, 8L90, 10L60, 10L80, or 10L90 automatic transmission (RPO M5M, MF6, […]

September 30, 2020
Turn Transport Mode Off Before New Vehicle Delivery

Turn Transport Mode Off Before New Vehicle Delivery

Transport Mode is intended for use when shipping new GM models over long distances from the assembly plant. When enabled, It reduces the parasitic electrical load on the battery when […]

September 30, 2020
Updated CSMT App Improves Pre-Repair Authorization Process

Updated CSMT App Improves Pre-Repair Authorization Process

Authorized U.S. dealership service department personnel can use the Pre-Repair Authorization (PRA) feature available in the Certified Service Mobile Toolbox (CSMT) application (Fig. 1) to request GM pre-approval for warranty […]

September 17, 2020
Mark of Excellence Xccelerate App Now Live

Mark of Excellence Xccelerate App Now Live

The popular Xccelerate mobile application is now available to all U.S. dealership technicians and service managers enrolled in the Mark of Excellence (MOE) program. Launched earlier this year as a […]

September 17, 2020
EL-50332 EV Battery Service and Depowering Tool Update

EL-50332 EV Battery Service and Depowering Tool Update

A software update for the EL-50332 EV/HEV Battery Service and Depowering Tool (Fig. 10) is now available through the Special Tools and Software Updates link in GM GlobalConnect.   Fig. […]

September 17, 2020
Proper Navigation SD Card Ejection

Proper Navigation SD Card Ejection

An SD Card Error message may be displayed on the infotainment screen if the navigation SD card is improperly ejected from the card slot (Fig. 12) on 2020 Buick Encore, […]

September 17, 2020
Engine Oil Pressure Gauge Changes Based on Engine Needs

Engine Oil Pressure Gauge Changes Based on Engine Needs

Engine lubrication on all 2019-2020 Silverado 1500 and Sierra 1500 trucks is supplied by a variable displacement oil pump. An oil control solenoid valve, controlled by the Engine Control Module […]

September 17, 2020
Rear Differential Whining Sound

Rear Differential Whining Sound

A whining, growling or grinding sound may be heard on some 2017-2019 Colorado and Canyon models during acceleration or deceleration when traveling from 20 mph (32 km/h) to highway speeds. […]

September 17, 2020
DTCs Set Due to Potential Engine Wiring Harness Conditions

DTCs Set Due to Potential Engine Wiring Harness Conditions

Some 2019-2020 Silverado 1500 and Sierra 1500 models equipped with the 2.7L engine (RPO L3B) may have DTCs P06DA (Engine Oil Pressure Control Solenoid Valve Control Circuit), P06DB (Engine Oil […]

September 17, 2020