Yearly Archives: 2016

Low Cab Forward Medium-Duty Trucks

The all-new Low Cab Forward medium-duty trucks are the latest in a long line of Chevrolet models in the commercial market. (Fig. 1) The seven new Low Cab Forward models, offered in regular cab or crew cab body styles, are … Continue reading

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Damaged Shipping Container Restraining Belts

Many service replacement engines, transmissions and transfer cases are delivered to dealerships in shipping containers that use a ratchet-style restraining belt. The belt is used to securely hold the component in place inside the shipping container. (Fig. 8)   Fig. … Continue reading

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Two Fobs Needed for RKE Transmitter Quick Learn on 2017 Models

For 2017 model year vehicles, excluding Acadia Limited, Enclave, Traverse, Express and Savana models, adding a new Remote Keyless Entry (RKE) transmitter, or key fob, using the quick learn procedure requires that two previously learned transmitters be present. (Fig. 12) … Continue reading

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Shift to Park Message with Five DTCs Set

2017 Malibu and Volt models. These models are equipped with the 5ET50 automatic transmission (RPOs MKV, MKE), which is an electronically-controlled, continuously-variable electric transmission (or drive unit) on hybrid models. (Fig. 14)   Fig. 14   The following DTCs may … Continue reading

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Service Know-How

The latest service topics from Brand Quality and Engineering are reviewed, including an update on the new 2017 Service Training Standards and how to perform a software update on the AFIT diagnostic tool. (Fig. 15)   (Fig. 15)   To … Continue reading

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New Essential Tool GE-52200 Propulsion System Lift

The new GE-52200 Propulsion System Lift table (Fig. 1) is designed for the removal/installation of electrical vehicle batteries as well as engines, transmission, transaxles, fuel tanks, suspensions, cradles and chassis system components.   Chevrolet Bolt EV dealerships are the first … Continue reading

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Sort It Out — New Service Information Table Sorting Features

The GM Service Information has implemented a number of new features recently designed to make it easier and more efficient to quickly access the information needed in the service bay every day.   Table Sorting   One of these new … Continue reading

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Inductive Charging Test Tool Adapter

A new Test Tool Adapter (EL-51755-UPD) has recently been shipped to all GM dealerships for use with the EL-51755 Inductive Charging Test Tool. The charging test tool is used to verify the charging system operation in a GM vehicle. The … Continue reading

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Unwanted Brake Apply in Reverse without Park Assist Activation

Some 2016-2017 CT6 and 2017 XT5 models may have an unwanted brake apply condition while in Reverse when there is no object behind the vehicle or around the vehicle. This condition may occur most often when the vehicle is cold … Continue reading

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Harsh Shifting on the 8L90 Automatic Transmission

There may be several harsh shifting conditions on some 2015-2016 Silverado, Sierra, Yukon and Escalade models equipped with the 5.3L engine (RPO L83) or 6.2L engine (RPO L86) and the 8L90 automatic transmission (RPOs M5U, M5X). The shift conditions may … Continue reading

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Topping Off Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) is required to maintain normal vehicle operation and emissions compliance on 2010-2017 Express and Savana; 2011-2017 Silverado and Sierra 2500-3500 HD; 2014-2015, 2017 Cruze; and 2016-2017 Colorado and Canyon models equipped with a diesel engine (RPOs … Continue reading

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AutoStop Active during Low-Speed Maneuvers

The 2016-2017 ATS and CTS feature the Auto Engine Stop/Start (AutoStop) system (RPO KL9), which turns off the engine when the brakes are applied and the vehicle is at a complete stop (depending on operating conditions). When the brake pedal … Continue reading

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Multi-Media Interface Tester Tool Update

The Multi-Media Interface Tester (EL-50334-20) (Fig. 5), which can be used to verify auxiliary, USB and Bluetooth connectivity between a device and a GM infotainment system, has recently received several updates that are available through a new software download.   … Continue reading

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Avoid Turbocharger Damage during Service Work

When performing underhood service work on the 2016 Cascada, use care to avoid damage to any turbocharger components on the 1.6L engine (RPO LWC).   Recently, turbochargers returned under warranty have had damage to the wastegate actuator solenoid vacuum port … Continue reading

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Truck and Snow Plow Headlamp Flicker

When equipped with snow plow equipment (Fig. 8), the headlamps of the truck or snow plow may flicker or be inoperative on some 2014 Silverado 1500 and Sierra 1500 models and 2015-2017 Silverado and Sierra models. This condition may occur … Continue reading

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Service Know-How

10217.01V – Emerging Issues January 13, 2017   The latest service topics from Brand Quality and Engineering are reviewed, including highlights of the Rear Seat Reminder feature (Fig. 10) and how to update the software in several diagnostic tools.   … Continue reading

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The Bolt EV Charges Ahead in the Electric Vehicle Market

As the first long-range, affordable electric vehicle (EV) from an established automaker, the new Chevrolet Bolt EV (Fig. 1) is charged with bringing electrical propulsion to a whole new range of consumers. With a fully-charged high voltage battery, the Bolt … Continue reading

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Bolt EV Propulsion System

The propulsion of the Bolt EV (Fig. 5) is achieved by an electric drive transmission that transfers the energy from the high voltage battery pack to the front drive wheels.   Fig. 5   Drive Motor Battery System   The … Continue reading

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Charging the Bolt EV

There are three different charging levels that can be used to charge the Bolt EV. (Fig. 9)   Fig. 9   • AC Level 1 is plugging in to a typical 120V/12 amp home outlet using the provided portable charge … Continue reading

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Bolt EV Reprogramming

Several precautions should be taken before reprogramming various control modules on the 2017 Bolt EV.   TIP: Verify the battery voltage is more than 12.6 volts but less than 15.5 volts before proceeding with reprogramming. The 12V battery must be … Continue reading

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Engineering Information Bulletins and Part Restrictions

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New 2017 Colorado and Canyon Action Center Now Available

A new GM Technical Assistance Center (TAC) Action Center has been established for the 2017 Colorado and Canyon (Fig. 1) equipped with the new high feature 3.6L V6 engine (RPO LGZ) and 8L45 8-speed transmission (RPO M5T). The Action Center … Continue reading

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Battery Learn Procedure Update for Stop/Start System

A new Power on Reset feature has been added to 2017 models equipped with Engine Stop/Start. As a result, the battery learn procedure is no longer required after a battery disconnect on 2017 Encore, Envision, LaCrosse, Regal, Verano, ATS, CT6, … Continue reading

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Electrical Conditions Resulting from Damaged Wiring Harness

A number of electrical conditions, including the instrument cluster gauges drop out, the radio and HVAC displays are blank, no crank/no start, and several Driver Information Center messages displayed, may be present on some 2013-2014 Malibu models. The air bag … Continue reading

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