Automotive Glossary of Terms - G -
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Definitions for automotive terms and illustrations from gas analyzer to gross vehicle weight rating.
GAS ANALYZER: A tool used to test the exhaust emissions of a vehicle. Gases tested include CO (carbon monoxide), CO2 (carbon dioxide), HC (hydrocarbons), O2 (oxygen) and sometimes NOx (oxides of nitrogen).
GAWR: Gross axle weight rating. The total maximum weight an axle is designed to carry.
GCW: Gross combined weight. The total combined weight of a tow car and trailer.
GEAR RATIO: A ratio expressing the number of turns a smaller gear will make to turn a larger gear through one revolution. The ratio is found by dividing the number of teeth on the smaller gear into the number of teeth on the larger gear.
GEARBOX: Transmission
GEL COAT: A thin coat of plastic resin covering fiberglass body panels.
GENERATOR: A device which produces direct current (DC) necessary to charge the battery.
GVWR: Gross vehicle weight rating. The total maximum weight a car is designed to carry including the weight of the car, passengers, equipment, gas, oil, etc.