2024 Essential Tool Forecast

2024 Essential Tool Forecast

The estimated 2024 GM Essential Tool forecast is now available for all U.S. dealerships. The forecast includes all expected Essential Special Service Tools along with shipment timing for the 2024 […]

February 16, 2024
Headlamps Flashing Due to Low Battery Charge

Headlamps Flashing Due to Low Battery Charge

Some 2024 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks may have an electrical condition where the headlamps flash and/or the windshield wipers pause while wiping. DTC P0606 (Control Module Processor Performance) […]

February 16, 2024
PicoScope Recording for CVTs with Noise Concerns

PicoScope Recording for CVTs with Noise Concerns

Diagnosing a whine sound or other internal noise concern in 2019-2024 Malibu; 2020-2024 Encore GX; and 2021-2024 Trailblazer models equipped with the VT40 Continuously Variable Transmission (CVT) (RPO MRG) may […]

February 16, 2024
Dual Clutch Transmission MCVM PUN Characterization

Dual Clutch Transmission MCVM PUN Characterization

Service Information repair procedures have been updated for repairs to the Dual Clutch Transmission (DCT) (RPO M1L) on 2020-2024 Corvette models. After making repairs to the DCT, including Main Control […]

February 16, 2024
Shift to Park Message

Shift to Park Message

A Shift to Park message may be displayed on the Driver Information Center while the vehicle is in Park on some 2020-2023 Encore GX, Malibu; and 2021-2023 Trailblazer models. A […]

February 16, 2024
2024 Technician Excellence Program Rewards Dealership Technicians for Training Achievements

2024 Technician Excellence Program Rewards Dealership Technicians for Training Achievements

The 2024 Technician Excellence Program (U.S.) recognizes and rewards enrolled dealership technicians for achieving technical training certifications and meeting other service criteria. (Fig. 1) The primary 2024 program metrics are […]

January 31, 2024
Hands-Free Start Power Modes

Hands-Free Start Power Modes

The 2024 Silverado EV and Blazer EV are equipped with Hands-Free Start, which automatically starts the vehicle when the driver enters the cabin with a remote key fob and then […]

January 31, 2024
Poor Ground Path Condition

Poor Ground Path Condition

Some 2020-2024 CT4 and CT5 models may have a no start condition and/or a loss of power steering. Communication DTCs U0101, U0131, U0401, U0402, U1611, U1818, U1962, U220F, U3003 sym16, […]

January 31, 2024
Inoperative Trunk Latch

Inoperative Trunk Latch

Some 2023-2024 Camaros may have a trunk lid that does not open when commanded from the vehicle’s trunk release buttons or the key fob. The inoperative trunk latch may be […]

January 31, 2024
New Service Tailpipes Available for Silverado and Sierra

New Service Tailpipes Available for Silverado and Sierra

GM Customer Care and Aftersales has released new service tailpipes and clamps for exhaust repairs on 2019–2024 Silverado 1500 and Sierra 1500 models equipped with the 4.3L (RPO LV3) and […]

January 26, 2024
Lunch with Your FSEs Meetings Now Offer Three Convenient Call Times

Lunch with Your FSEs Meetings Now Offer Three Convenient Call Times

GM dealership technicians (U.S. only) looking to get the latest technical information as well as talk with their Field Service Engineers (FSEs) about recent repairs seen in the dealership should […]

January 26, 2024
Loud Sound Inside the Cabin at Low RPMs

Loud Sound Inside the Cabin at Low RPMs

A loud sound may be heard inside the cabin at 1,200–2,500 RPMs on some 2024 XT4 models. (Fig. 6) The sound typically occurs only during one drive cycle and does […]

January 26, 2024
January Service Newsletter from the Experts at GM TAC

January Service Newsletter from the Experts at GM TAC

The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the January GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]

January 26, 2024
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. This month the seminar demonstrates the pierce probing wires procedure. (Fig. 8)   […]

January 26, 2024
Avoiding HVAC Blower Motor Parts Return Damage

Avoiding HVAC Blower Motor Parts Return Damage

Many times, common warranty repairs like HVAC blower motor replacements require that the part be returned to GM. Just like other vehicle components that are returned under warranty, HVAC blower […]

January 12, 2024
Newly Arrived EVs May Not Charge

Newly Arrived EVs May Not Charge

Some 2024 Silverado EV, HUMMER EV and HUMMER EV SUV models that have just arrived at the dealership may not charge initially when the vehicle is connected to a Level […]

January 12, 2024
High Resistance in Ground Straps

High Resistance in Ground Straps

There may be high resistance in the G132 and G133 grounds, located behind the right-hand wheelhouse liner on some 2019-2022 Silverado 1500 and Sierra 1500 models. (Fig. 5) As a […]

January 12, 2024
Inoperative 110/120-Volt Power Outlet

Inoperative 110/120-Volt Power Outlet

The 110/120-volt power outlet may be inoperative on some 2020-2023 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models. Vehicles may have two alternating current power outlets, located in the cab on the […]

January 12, 2024
Forward Collision Alert Indicator On at All Times

Forward Collision Alert Indicator On at All Times

Some 2020-2024 XT5 and XT6 models may have the Forward Collision Alert indicator shown on the windshield at all times. (Fig. 9) The indicator may be on any time the […]

January 12, 2024