Archive for April, 2020

Corvette Competition Sport Seat Bolster Pad Support

Corvette Competition Sport Seat Bolster Pad Support

The all-new 2020 Corvette Stingray features three available seats: GT1, GT2, and Competition Sport. (Fig. 1) On some models with the Competition Sport seats, the sides of the aggressive seat […]

April 30, 2020
Valve Body Assemblies Function Tested Before Shipping

Valve Body Assemblies Function Tested Before Shipping

When replacing a valve body assembly (Fig. 7) on an 8-speed or 10-speed automatic transmission or solenoid body assembly on a 9-speed automatic transmission, technicians may notice the service part […]

April 30, 2020
Fluid on Top of Transmission Assembly

Fluid on Top of Transmission Assembly

Some 2020 Encore GX, Regal, XT4, XT5, XT6, Blazer, Equinox, Malibu, Acadia, and Terrain models equipped with the 9T45/50/60/65 9-speed automatic transmission (RPOs M3F, M3D, M3T, M3H, MJD, M3G, M3W, […]

April 30, 2020
Loose Carbon Patch in Air Cleaner Housing

Loose Carbon Patch in Air Cleaner Housing

A loose carbon patch in the air cleaner housing may be restricting air flow across the Mass Airflow (MAF) sensor on some 2020 Corvette models. (Fig. 11) DTCs P0101 (Mass […]

April 30, 2020
Identify Key Fobs and Relearn TPMS Sensors with Essential Tool EL-52545

Identify Key Fobs and Relearn TPMS Sensors with Essential Tool EL-52545

The EL-52545 TPMS and RF tool that was shipped as an essential tool to all GM dealerships in October 2019 can help with the diagnosis and repair of systems that […]

April 30, 2020
Wiring Harness Routing and Engine Performance Conditions

Wiring Harness Routing and Engine Performance Conditions

There may be several engine performance conditions found on some 2019-2020 Silverado 1500 and Sierra 1500 models equipped with the 4.3L V6 engine (RPO LV3), 5.3L V8 engine (RPOs L82, […]

April 30, 2020
Front Suspension Rattle at Slow Speeds

Front Suspension Rattle at Slow Speeds

A rattle or creak noise at slow speeds over bumps or broken pavement on some 2013-2016 Acadia; 2013-2017 Enclave, Traverse; and 2017 Acadia Limited models may be originating from the […]

April 30, 2020
New FSE Technician Recognition Awards

New FSE Technician Recognition Awards

The Field Service Engineer (FSE) Technician Recognition Awards (U.S.) is a new recognition program that celebrates the skill and dedication of dealership technicians who have recently worked with FSE’s on […]

April 30, 2020
Service Information Search – Getting the Best Results

Service Information Search – Getting the Best Results

Enter a few keywords in the Search box of the Service Information (SI), click the Search button, and all related results are shown. (Fig. 1) In some cases, depending on […]

April 15, 2020
New GM ToolNet Special Tools App Now Available

New GM ToolNet Special Tools App Now Available

The new GM ToolNet special service tools inventory management application is now available to GM dealerships in the U.S. The Canadian application launches on April 20. To access the site, […]

April 15, 2020
Crankshaft Balancer Removal

Crankshaft Balancer Removal

On some 2019 CT6; 2019-2020 XT4, Silverado, Sierra; 2020 CT4, CT5, XT5, XT6, Blazer, and Acadia models equipped with the 2.0L engine (RPO LSY) or 2.7L engine (RPO L3B), the […]

April 15, 2020
Poor Heater Performance Due to Coolant Hose Restriction

Poor Heater Performance Due to Coolant Hose Restriction

Poor heater performance may be experienced on some 2020 Silverado and Sierra models equipped with the 3.0L diesel engine (RPO LM2). The poor performance may be caused by the heater […]

April 15, 2020
Duramax Diesel Warm Engine Idle Knock Sound

Duramax Diesel Warm Engine Idle Knock Sound

Some 2020 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the […]

April 15, 2020
Unable to Deactivate Brake Boost System

Unable to Deactivate Brake Boost System

A GDS2 error message stating “Request Rejected by the Control Module” may occur when trying to deactivate the brake boost system while performing the hydraulic brake system bleeding procedure on […]

April 15, 2020
Low Oil or Add Oil DIC Messages

Low Oil or Add Oil DIC Messages

A Low Oil or Add Oil message may be displayed on the Driver Information Center (DIC) on some 2019 Silverado 1500, Sierra 1500; 2020-2021 Silverado 1500, Silverado 2500/3500, Sierra 1500, […]

April 15, 2020
Normal 1.2L Engine Sound

Normal 1.2L Engine Sound

The 2020 Encore GX and 2021 Trailblazer feature the new 1.2L turbocharged engine (RPO LIH). (Fig. 20) The engine may have a noticeable sound under certain circumstances. Fig. 20   […]

April 15, 2020
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 […]

April 15, 2020