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2003 GMC C5500 Topkick C5C042 6.6L Alternator
Posted to GM Electrical on 10/3/2017 9 Replies

Alt. charges randomly. Set code PO621 (Gen. L term.) Tested while charging. Tec 2 shows V @ term. L; Have 11.5V @ brown wire,35% D/C on gray wire, and B+ on red. Caught it while not working:1.33V brown;67%D/C gray;(B+ red) Shows no V on scanner. Disconnect plu...

9 Replies Received (View Replies)

  Related Documents & Media  2003 GMC C5500 Topkick C5C042

 
Message Closed w/FIX

car Vehicle Data

2003 GMC C5500 Topkick C5C042

VIN 1GDE5E1173
Engine6.6 L / 8 cyl / DIESEL
DeliveryFuel Injection
AffectedAlternator
ConditionsNo Charge
Message Closed w/FIX

car Vehicle Data

2003 GMC C5500 Topkick C5C042

VIN 1GDE5E1173
Engine6.6 L / 8 cyl / DIESEL
DeliveryFuel Injection
AffectedAlternator
ConditionsNo Charge