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GMC Forum: 03 drops voltage when in drive
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Old 02-11-2018, 04:04 PM
Mygmc Mygmc is offline
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Drives a GMC Truck
Join Date: Feb 2018
Posts: 1
Default 03 drops voltage when in drive

My 03 sierra has a good battery and new alternator. But when I put it in drive or reverse the volts drop and sometimes the truck dies, a real bitch at a stop light.. anyway when the truck is in park it runs fine only in drive or reverse. The funny thing is I used to have a check engine light on, well after it died the first time the check engine light is no longer there. Any ideas on what could be the problem. ???
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