What is the spark plug number and gaping for 1994 Cheyenne 2500 truck?

The spark plug number and gap for a 1994 Chevrolet Cheyenne 2500 depend entirely on the engine it has. The Cheyenne 2500 came with several different engines. You must know your engine's displacement (e.g., 5.7L, 6.5L, 7.4L) or the engine code (found on a sticker under the hood or on the driver's side door jamb) to determine the correct spark plugs.

Once you know the engine, consult your owner's manual, or use an online parts lookup tool (like those found on auto parts store websites such as AutoZone, Advance Auto Parts, or Napa Auto Parts) by entering your vehicle's year, make, model, and engine. These tools will provide the correct spark plug information, including the gap specification.

Do not attempt to guess the spark plugs. Using the wrong plugs can severely damage your engine.