Getting a mail order tune from Frost but need help.
Ok, I understand the whole process for removing PCM from the car, mailng and payment. I see that it will take care of the rear O2 sensors amoung other adjustments for power. Right now I have trouble codes for the front O2's though. I am 99% certain this is from the long tube headers that are on the car. I will be including that information on my order sheet, however, will this tune remedy the SES light for all of the O2 sensors? I plan on replacing the front two with some Delcos if not. The codes for most of the sensors are for the heater circuit and one is for insufficient switching. I don't know what the tune will do with the front sensors if anything so if someone could elaborate on that I would greatly appreciate it.
On another note; the car came programmed with a Predator handheld programmer. It has the option to remove the programming and install the GM factory tune from saved data. Am I going to run into any issues since the PCM has had prior tuning? I am assuming I should upload the GM factory tune prior to sending it in.
