2020 Bolt EV Battery Updates Add to Electric Range

2020 Bolt EV Battery Updates Add to Electric Range

Starting with model year 2020, the Bolt EV will offer an EPA-estimated 259 miles (417 km) of range on a full charge, a 21-mile (34 km) increase over previous model […]

October 31, 2019
New SVG Graphics in the Service Information

New SVG Graphics in the Service Information

The Service Information (SI) now features new Scalable Vector Graphics (SVG) in some of the new SI documents and bulletins. (Fig. 4) Simply put, this means the new graphics and […]

October 31, 2019
Inspecting the Diesel Fuel System for Contamination

Inspecting the Diesel Fuel System for Contamination

Water and other contaminates in diesel fuel will create drivability concerns and a loss of engine power. If water and/or debris is present in the fuel system, the fuel cannot […]

October 31, 2019
New EL-52545 TPMS and RF Tool Identifies Key Fobs

New EL-52545 TPMS and RF Tool Identifies Key Fobs

The new EL-52545 TPMS and RF tool (Fig. 17), which will be shipped as an essential tool to all GM dealerships in the 4th quarter of 2019, is designed to […]

October 31, 2019
Enabling or Disabling Passive Unlocking

Enabling or Disabling Passive Unlocking

The passive door unlocking feature, which uses the button on a door handle (Fig. 23) to unlock many 2019-2020 GM models, can be enabled and disabled using the Remote Keyless […]

October 31, 2019
Cover BDU Electrical Connectors Before Removing Coolant Hoses

Cover BDU Electrical Connectors Before Removing Coolant Hoses

The Drive Motor Battery, or high voltage hybrid/EV battery, on 2011-2019 Volt models (Fig. 26) is cooled or heated in order to maintain a proper temperature that aids system performance […]

October 31, 2019
Steering Wheel Oscillation Conditions

Steering Wheel Oscillation Conditions

Some 2020 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models may have a steering wheel oscillation, vibration or shake condition at speeds of 50–80 mph (80–129 km/h). (Fig. 33) It may be […]

October 31, 2019
Incorrect Fuses in Instrument Panel Fuse Block

Incorrect Fuses in Instrument Panel Fuse Block

The Automatic Engine Stop/Start system (RPO KL9) may be inoperative on some 2019-2020 Silverado 1500 and Sierra 1500 models. DTCs P3055 (DC/DC Converter Output Voltage 1 Performance) and P3056 (XXX) […]

October 31, 2019
Next Generation Digital Vehicle Platform Provides Foundation for Future Technology

Next Generation Digital Vehicle Platform Provides Foundation for Future Technology

As the technology in new vehicles continues to evolve and expand, more electrical bandwidth and connectivity has become necessary to ensure all the data-driven features can operate efficiently together within […]

October 16, 2019
Getting Ready for Techline Connect

Getting Ready for Techline Connect

Currently being rolled out to select dealerships in the U.S., Techline Connect brings together all the common resources technicians use every day for diagnosis and repairs in one simple application. The […]

October 16, 2019
New EL-52545 TPMS and RF Tool Makes TPMS Sensor Relearn Easy

New EL-52545 TPMS and RF Tool Makes TPMS Sensor Relearn Easy

Ever since the Tire Pressure Monitor System (TPMS) was federally mandated (U.S.) in 2008, radio frequencies have been used on GM models to communicate with the system and to determine […]

October 16, 2019
Diesel Fuel Additives

Diesel Fuel Additives

As colder winter weather rolls in, GM recommends using TOP TIER Detergent Diesel fuel in 2014-2020 GM models equipped with a diesel engine in order to maintain optimal engine performance. […]

October 16, 2019
Transmission Control Module Connector

Transmission Control Module Connector

Some 2019 Silverado 1500, Sierra 1500; and 2020 Silverado and Sierra models may have a discharged battery, the ignition may not turn off, a Shift to Park message may display […]

October 16, 2019
Intermittent Shift to Park Message

Intermittent Shift to Park Message

There may be an intermittent Shift to Park message displayed on the Driver Information Center (DIC) when the vehicle has been shifted to Park and the ignition has been turned […]

October 16, 2019
Whistle Sound from the Engine

Whistle Sound from the Engine

There may be a whistle or squeak sound heard coming from the engine area on some 2019-2020 Blazer models equipped with the 3.6L 6-cylinder engine (RPO LGX). The sound may […]

October 16, 2019
GM Service Know-How

GM Service Know-How

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 16, 2019