GMC TSB #PI1214B
2013 GMC Sierra 1500
Affected Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
- Summary
- This preliminary informational bulletin provides service personnel with a guide to determine which SI documents and scan tool parameters to reference when encountering an: Exhaust Fluid Quality Poor message displayed, and a Reductant Fluid Quality Test status that will Pass, Time Out, Fail or Interrupt and other DEF messages that maybe observed.