GMC vehicles are made in the United States of America.
No, GMC deals do not warranty repairs on other makers of vehicles. They do however warranty their own vehicles. It would make no sense for them to warranty other vehicles.
Chevy and GMC are both part of the General Motors corperation
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GMC Canada makes the following: Buick, Cadillac, Chevrolet, and GMC brands. Those include Camaro V6, the new Buick LaCrosse sedan, and the Chevy Volt which is an electric powered car.
Some vehicles are not equipped with a fuel cutoff switch. A 2000 GMC Jimmy is an example of a vehicle that does have a fuel cutoff switch.
GMC dealers sell trucks, vans SUVs, and crossovers, including hybrids as their newest option. GMC vehicles allow you to safely transport more than 4 people at a time.
A chevy Tahoe is the same suv, just badged differently. Some parts are interchangeable with the gmc/chevy pickups of the same model run.
GMC vehicles do not use inertia/reset switches.
Chevy/Oldsmobile
If you want to purchase a used GMC truck, you can check any authorized GMC dealer. Many of them will sell previously owned vehicles, including GMC trucks.
The GMC Yukon is ranked as one of their top dependable vehicles. GMC is ranked 20 in the nation for dependable brands.