02shayne2500hd

I have a 02 Silverado 2500 HD with a 6.0l in it. I tried installing a tune on it and my obd ll port won't power up the tuner. I also tried my scan tool and it won't read either. Can anyone point me in a direction to start to correct my problem?

oldchevy

Does your scan tool power up or does it power up and able to connect? If the port is dead you probably have a blown fuse. In most years the fuse also is for the cigarette lighter. It is best to check all the fuses.

cleveland63b

i agree check cig lighter fuse

02shayne2500hd

That was the fix. I checked all the fuses a couple days ago and the CIG lighter one was blown so I changed it and never thought to try that I never would have guessed it was on the same circuit. I have mostly been a Mopar man until recently. Thanks for the help

paraloco

I also noticed that my obd port was not working at all. now I'll go check that fuse. Its probably the only one I didn't check.

Donny Bush

Please help anybody no data communication through my OBD two truck runs fine I only have four wires in my OBD 22 are showing ground one power number two and fluctuates from .2 bolts to three volts
please help