* Carburetors are not motors. A carburetor is a fuel delivery system that mixes fuel with air for combustion in the engine. The engine itself is the motor.
* GMC made many different models in 1985. The engine and carburetor used would vary greatly depending on the specific GMC model (truck, van, etc.).
* "Motor manual" is ambiguous. Are you looking for a manual specifically for the Quadrajet, or for the engine it is attached to?
To help you find the information you need, I need more details. Please tell me:
* What specific GMC model do you have? (e.g., Sierra, Jimmy, Caballero, etc.)
* What is the engine size? (e.g., 350 cubic inch, 4.3 liter, etc.)
* Are you looking for a manual about the Quadrajet carburetor itself, or about the engine it's attached to?
Once I have this information, I can help you find the correct manual or resources.
