Learn more about the products that GM has to offer in the glossary below. If you have any questions about trucks in particular, read through our Glossary of Truck Terms (PDF)

Learn more about the products that GM has to offer in the glossary below. If you have any questions about trucks in particular, read through our Glossary of Truck Terms (PDF).


Adaptive Seating

Automatically recognizes occupant position and adjusts the seat cushions to custom-fit every individual.

Alternative Fuel

Methanol, denatured ethanol and other alcohols; mixtures containing 85% or more by volume of methanol, denatured ethanol and other alcohols with gasoline or other fuels; natural gas; liquefied petroleum gas; hydrogen; coal-derived liquid fuels; non-alcohol fuels (such as biodiesel) derived from biological material; and electricity. 'P-Series' fuels were added to this list since the original definition in EPAct.

Alternative Fuel Vehicle (AFV)

As defined by the Energy Policy Act, any dedicated, flexible-fuel or dual-fuel vehicle designed to operate on at least one alternative fuel.

Antilock Brake System (ABS)

Automatically adjusts brake pressure to the wheels during hard braking situations to help the driver maintain steering control by reducing wheel lockup while braking on most slippery surfaces.



Business Associate Code

Backlit Controls

Used on many switches to make them easy to find in the dark (e.g., power door-lock switches, heating, ventilation and air conditioning controls).



May be used to represent 1) Entire vehicle as produced by the factory when no body is included (cab, frame, powerplant, drive line, suspensions, axles, wheels and tires); 2) Same as number 1 except excluding cab and other sheet metal; or 3) Frame only with brackets, bumper and other miscellaneous parts directly attached to the frame.


Any vehicle that is integral to a business. These dedicated "work" vehicles make businesses run. In many cases, these vehicles are modified to enhance their ability to better serve their owners. Plumbers, construction workers or delivery drivers, for example, sometimes need a vehicle that is specially equipped for their day-to-day business operations. The volume requirements of commercial customers vary dramatically. Some customers, such as tradespeople, operate one vehicle at a time, while other customers operate several thousand vehicles.


Daytime Running Lamps (DRL)

Headlamps automatically turn on at low intensity when ignition in turned on, increasing vehicle visibility to other drivers.


This orange-colored extended-life engine coolant is ethylene glycol-based with a unique inhibitor formulation to protect engine metals. Service change interval is 5 years/100,000 miles (whichever comes first).


Dual Rear Wheels



Electronically Tuned Receiver

Electrochromic Rearview Mirrors

Automatically dim when struck with light.

Engine Oil-Life Monitor

Tracks engine rpm, coolant temperature and driving time to predict the condition of the oil. A light illuminates on the instrument panel when it is time to change the oil.


See U.S. Environmental Protection Agency



Fleet Account Number


Federal Motor Vehicle Safety Standards


Allows driver to flash high-beam headlamps as a passing signal to vehicles ahead.

Fuel-Cell Technology

An electrochemical engine with no moving parts that converts the chemical energy of a fuel, such as hydrogen, and an oxidant, such as oxygen, directly to electricity. The principal components of a fuel cell are catalytically activated electrodes for the fuel (anode) and the oxidant (cathode) and an electrolyte to conduct ions between the two electrodes.



GM Oil-Life System


GM Vehicle Information System

Gross Vehicle Weight Rating (GVWR)

When properly equipped, includes weight of vehicle, passengers, cargo and equipment.


National Highway Traffic Safety Administration (NHTSA)

The National Highway Traffic Safety Administration (NHTSA), under the U.S. Department of Transportation, was established by the Highway Safety Act of 1970, as the successor to the National Highway Safety Bureau, to carry out safety programs under the National Traffic and Motor Vehicle Safety Act of 1966 and the Highway Safety Act of 1966. The Vehicle Safety Act has subsequently been recodified under Title 49 of the U.S. Code in Chapter 301, Motor Vehicle Safety. NHTSA also carries out consumer programs established by the Motor Vehicle Information and Cost Savings Act of 1972, which has been recodified in various Chapters under Title 49.



An in-vehicle safety and security system that provides access to advisors who can help protect you and your family while on the road. OnStar is available on most GM models. Call 1-888-4Onstar or visit for details.


Parade Dimming

Maintains intensity of all instrument panel vacuum fluorescent displays such as radio and climate control when headlamps are in use during daylight hours.


A theft-deterrent system that features an electronically coded pellet in the key.


A theft-deterrent system that disables the engine unless the PASSlock cylinder is correctly engaged with a mechanical key. It does not require the use of a coded pellet in the key.


Remote Keyless Entry (RKE)

Transmits a uniquely coded, high-frequency radio signal to lock or unlock doors and unlock the trunk/rear hatch from up to 30 feet away.

Retained Accessory Power (RAP)

Radio and windows remain operative for 10 minutes after ignition is shut off or until a door is opened.


Service Information

SiriusXM TM Satellite Radio

Satellite radio service available on select GM models. Not available in Alaska or Hawaii. For more information, visit


A stability enhancement system that makes our already safe vehicles even better.


Special Vehicle Manufacturer



Designed to discourage radio theft, it works by using a secret code to disable all radio functions whenever the battery power is removed.

Tilt-Wheel Steering Column

Allows the driver to tailor the wheel to the most comfortable, individualized steering position.

Tow/Haul Mode

When engaged, Tow/Haul mode enhances trailering by reprogramming the automatic transmission shift schedule while you're transporting heavy loads.

Twilight Sentinel

Module that senses the amount of daylight and, if need be, automatically turns on the headlamps.


U.S. Department of Energy (DOE)

A department of the federal government, its mission includes the coordination and management of energy conservation, supply, information dissemination, regulation, research, development and demonstration. The Department includes the Office of Transportation Technologies.

U.S. Environmental Protection Agency (EPA)

The government agency that is responsible for protecting the environment and public health. The EPA seeks to reduce air, water and land pollution and pollution from solid waste, radiation, pesticides and toxic substances. The EPA also controls emissions from motor vehicles, fuels and fuel additives.

U.S. Department of Transportation

A government agency whose mission is to ensure a fast, safe, efficient, accessible and convenient transportation system that meets the national interests and enhances our quality of life.