2000 Chevy Blazer well not stay on when put into gear
scan for codes even if the light ain't on , is a good place to start
It was scanned for codes I have replace the alternator, the distributor cap and and have checked. It also wont keep the battery won't keep a charge either it has to be jump started every time it gets turned on
check the power wire going to the starter, make sure it's not grounding.
sounds like you have a short somewhere , search "parasitic drain"
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