The spark plug gap for a 1990 Chevy Silverado depends on the engine. There's no single answer. You
must consult your owner's manual or a reliable repair manual specific to your truck's engine (e.g., 4.3L V6, 5.0L V8, 5.7L V8, 6.2L V8, etc.).
The gap is typically between 0.040" and 0.060" inches, but that's a broad range. The exact specification is crucial for proper engine performance and starting. Using the wrong gap can lead to misfires, poor fuel economy, and engine damage.
