amen i have a 10 yr old alternator on mine, but i had a new SI off the truck do this under a load. it can never hurt to clean a few things for sure.Originally Posted by Turbodude06
This could be anything I had this problem once and it ended up being my throttle body just needed to be cleaned. But I would start with cleaning the battery connections too.. The altenator could be starting to go out too, cause when your on your brakes its lighting up the brake lights...
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