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Haha the tune will improve some more as you drive it and it adapts more to the car.
What was going on with the stereo? I remember running into something when I done the hu in my impala, I'm trying to remember that it was and how I fixed it. It was basically the same system.
As far as the oil percentage, you turn the key to the on position without starting and push the gas pedal to the floor 3 times very quick all the way up and all the way down. That resets it.
With the stereo interface, you hook everything up. You adjust the stereo to max volume, pop the cover off the box if it's the "black" box or look for the adjusting screw on the side and set the gain. You adjust it up and down until you get a good clean and loud sound from the Headunit. Then install the headunit and piece the dash back together. There should be 2 adjustment screws, one for the volume of the "chime" and one for the "gain".
That is the problem I had. I remember now
the subs wouldn't have fit, but I could have used the headunit, amp and the infinity kappa 6x9s to put in some wedge boxes 
I'm pissed that I didn't get to get my stereo out of the impala before it got repoed.
I lost the stereo, magnaflow exhaust and 4" tips (was gonna cut off the rear section 
) new set of wheels and a bunch of other **** I had done to it.They snagged the car without notifying me, and wouldn't let me take anything permanently mounted to the vehicle. And my dumbass had bolted my amp and sub box down cause it didn't wanna stay in place driving too fast to work
