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What is the best spark plug gap setting for a GM 5.7 Engine in 1500 Van?

The best spark plug gap for a GM 5.7L engine in a 1500 van depends on the year of the van and the specific spark plugs used. There's no single answer.

You must consult your owner's manual. This manual will specify the correct gap for your engine and year. The information is crucial for optimal engine performance and to avoid misfires or damage.

Failing that, you can try:

* Checking the spark plug box: The packaging for the replacement spark plugs often lists the recommended gap.

* Consulting a reliable online parts source: Sites like AutoZone, Advance Auto Parts, or RockAuto allow you to search by vehicle year, make, and model to find the correct spark plug and gap specifications.

Improper gap settings can lead to poor performance, misfires, hard starting, and even engine damage. Don't guess; always use the manufacturer's recommended setting.

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