Here's why:
* Q-Jet was a popular carburetor model by Carter, specifically designed for use on General Motors vehicles.
* GMC is a division of General Motors, so it makes sense that their vehicles would use Carter Q-Jet carburetors.
Here are some specific examples of GMC vehicles that might have used a Q-Jet:
* Pickup Trucks: From the late 1960s to the mid-1980s, GMC's C/K series pickup trucks were often equipped with Q-Jet carburetors.
* Suburban SUVs: The GMC Suburban, a popular full-size SUV, also used Q-Jet carburetors during this period.
* Other Models: Other GMC models, such as the Caballero and Jimmy, also used Q-Jet carburetors in various configurations.
Note: While it's most likely from a GMC vehicle, the Q-Jet was also used on other General Motors brands, like Chevrolet, Buick, Oldsmobile, and Pontiac.