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here are what the codes are:

DTC 652-6 - GM Gas Injector 2 Drive Circuit Shorted To Ground
DTC 653-6 - GM Gas Injector 3 Drive Circuit Shorted To Ground
DTC 654-6 - GM Gas Injector 4 Drive Circuit Shorted To Ground
DTC 656-6 - GM Gas Injector 6 Drive Circuit Shorted To Ground

Possible causes are:
- Injector Driver Circuit Short To Ground
- Shorted Injector Coil
- Injector Driver Module Failure
- Functional Failure in Controller

good luck
  • Posted 3 Oct 2013 21:05
  • Modified 3 Oct 2013 21:05 by poster
  • By swoop223
  • joined 23 Mar'12 - 3,691 messages
  • North Carolina, United States
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