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+1. My truck will do this if I don't clean the battery connections at least twice a year. Even though they look immaculate, it will fail to crank, and it will work perfectly after I clean them.
 

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Super Moderator
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Even if they look clean, scrape it all with a battery brush/terminal cleaner.

Also, check the battery voltage after sitting overnight with engine off (should be about 12.4V); while idling (should be about 13.8-14.4V); and while cranking (should be about 10.5V or higher). The battery may be failing, or the charging system has a fault, if any of these 3 are out of spec.
 
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