My 2001 Silverado won't start sometimes, unless I sit and wait try again if not sit and wait. Sometimes it may take up to 30 min to get it started. I have tried a new fuel filter and a lot of fuel injector cleaner. I have taken it to a dealer and they say there is no chip in my key to go bad. It turns over just fine it just won't catch.

. Change the platinum spark plugs (ACDelco only), if they haven't been changed in the last 50,000 miles?

. Perform tests in the link below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-11.html#post2123675