Charging system failure

Tiny
CQCARPROS
  • MEMBER
  • 2007 GMC SIERRA
  • AUTOMATIC
Hello, I have a 2007 GMAC Sierra 1500. While driving the battery light came on and the dash displayed 'charging system failure'. The battery was tested and it tested good. Charging system tested while vehicle was running and it failed, no charge. Alternator was removed and bench tested and it passed all test. Reinstalled alternator was reinstalled, checked all terminals and wire connections to make sure they were secure. Dash continues to display 'charging system failure'. The dash volt meter shows that it is charging at 12 volts.

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Thursday, August 11th, 2011 AT 2:22 AM

2 Replies

Tiny
RASMATAZ
  • MEMBER
Could be caused by the computer controlled of the alternator's field generation circuit-have it checked
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Thursday, August 11th, 2011 AT 5:09 AM
Tiny
IMTHONE
  • MEMBER
Check belt make sure its not slipping
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Tuesday, January 29th, 2013 AT 3:14 PM

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