Hey guys, currenty have my sierra tuned to run in speed density, which still has 2 dtc's that set, but the MIL is turned off. I need to smog the truck for a sale, and in CA I cant have any DTC's detected by the scanner. I was hoping someone can help me figure out what to change in HPT's need to be made so I can at least have it pass the OBD test, then I can just revert back to the SD tune.
I guess just turning off the codes will cause the truck to not run or run very poorly. I just need it run enough to have all the readiness codes complete and not DTC's