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2003 GMC Sierra 2500 HD SLE 6.6L Alternator
Posted to GM Electrical on 1/29/2007 8 Replies

Vehicle came in with battery light on, "no battery charging" message on dash. Tested for output, found no alternator output. Scanned OBD, found code p0621 "gen L terminal fault. Figured the alernator was bad, so got another one and installed it, still no charg...

8 Replies Received (View Replies)

  Related Documents & Media  2003 GMC Sierra 2500 HD SLE

 
Message Closed w/FIX

car Vehicle Data

2003 GMC Sierra 2500 HD SLE

VIN 1GTHK23173
Engine6.6 L / 8 cyl / DIESEL
Trans5-speed Automatic (Electronic)
DeliveryFI
AffectedAlternator
ConditionsNo Output
Misc.Crew Cab, PCM #12210729
Message Closed w/FIX

car Vehicle Data

2003 GMC Sierra 2500 HD SLE

VIN 1GTHK23173
Engine6.6 L / 8 cyl / DIESEL
Trans5-speed Automatic (Electronic)
DeliveryFI
AffectedAlternator
ConditionsNo Output
Misc.Crew Cab, PCM #12210729