Failing that, you can:
* Check the sticker under the hood: Sometimes, manufacturers place a sticker with maintenance information including spark plug gap specifications.
* Look up the gap online using your engine's displacement (e.g., 5.7L, 4.8L): Searching "[Your Silverado's Engine Displacement] spark plug gap" will yield results, but always double-check against your owner's manual for the most accurate information.
Using the wrong gap can lead to misfires, poor performance, and damage to your engine. Always prioritize the information found in your owner's manual.
