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Thanks. I?ll look it up.
I have this cable that came with the + scanner but the one you described sounds like the ticket.

Thanks. I won?t dwell on the voltage any more. I just don?t remember it dropping down that low and I swear the oil press gauge dips when this happens.
I?m replacing those fan relays. I think the...

Thanks for the help. I?m gonna get back on it tonight. Been doing a lot of reading. Lots of good info on here.

I have the prolink+ cable so guess It will wire up to it. HP tuners didn't list one.

Thanks. Good information; is there any way to turn the regulator on and off?

Was goiing to try and buy a wide band O2 sensor tonight...
Any advice on which one to get for the MPVI2+; they also have a LSU 4.2.
I have the cable to wire it into. Jsut need to pick a sensor.
...

Stock tires.

Found broken vacuum hose fitting from passenger side valve cover to intake.
So it is sucking a little air, not much. Gonna try and replace tomorrow.
and replace fan relays.
Do I need to worry...

I'll check the hoses.
Seems to be generating a lot of heat. the IAT goes up when not moving and it's pushing a lot of heat out of the radiator.
The MAF just seems to run down on the lower end of...

I didn't think about the cats getting plugged.
any ideas on troubleshooting this, maybe take the O2 sensor out and get a back pressure reading?
The fans don't seem to be running on high speed all...

Good day everyone,
I just purchased the HP tuner kit with pro feature package and I'm getting started with a 2013 Yukon Denali, 6.2 that is running hot and low power.
I'm doing a lot of...