Random P0700 and P0607 Codes

[J2Jones]

 

I have a 2019 GMC Sierra 1500 with 6.2L.  About 42,000 miles.  Stopped at the pharmacy the other day and when restarting the truck, it threw an Orange, constant on CEL.  The truck drove normally but the light stayed on through multiple starts/stop through the day.  Took it to Advanced Auto Parts and their scanner gave the generic codes above.  I started the vehicle to back it out of the garage yesterday and CEL was still lit.  Went out late in the day and restarted to pull in to the garage and the CEL was gone.  I've only driven 5-10 miles since it originally came on.  Any ideas?  Has anyone else seen this?  TIA for any help.

 

Also, the myGMC app reflected warnings on the following but they are all gone now too...
   Engine and Transmission System

   ABS

   Stabilitrak Stability Control

   Airbag System

 

Edited December 29, 2022 by J2Jones

[Transient]

Google tells me P0700 is a transmission or transmission control module issue. P0607 results in an ECU/PCM/ECM programming issue. In my very limited experience it could've been an emerges gremlin that appeared for just a moment and went away just a quickly. The light was probably on for several engine start/stop cycles (5-10) and not seeing any new issues during that time resulted in the light going off.  Computer may still have a record of the DTCs.  Going back to the auto parts store to see if the code still come up may help in knowing this.

 

Btw, whenever I have a CEL on any of my vehicles I immediately press the OnStar button and have them check for issues.  If they find anything at that moment they can email you the results so you can provide documentation to your dealer service dept.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[J2Jones]

2 hours ago, Transient said:

Btw, whenever I have a CEL on any of my vehicles I immediately press the OnStar button and have them check for issues.  If they find anything at that moment they can email you the results so you can provide documentation to your dealer service dept.

 

Thanks for the suggestion, hadn't thought of that and will certainly do that if the light comes back on.  I have a code scanner on the way and an appointment with the dealer on Monday.