Just installed Range device, potential issue

[scomis]

2009 Tahoe 5.3. 175000 miles. I have owned it for a month and a half and have not heard a single tick. I bought a range device, plugged it in yesterday and drove it to and from work. Loved the subtle differences in how it drove.
However, when I started it cold this morning, I noticed a small tick that lasted about 10 seconds. Any ideas as to why this would have happened? Is the Range device reducing the oil from the top of the motor and causing issues?
I unplugged it for now, so I can check it on cold start tomorrow.
I bought the Range device to try to be proactive and make the motor last many more mile before any ticking developed........ not immediately cause ticking.........

 

[scomis]

I was just googling about this. Something mentioned it could be piston slap that was masked by the AFM previously? Now that it's disabled, it's noticable?

 

[mikez71]

It won't enable until the engine has been running for 30 seconds, and won't enable in Park/Neutral unless vehicle speed is below 0mph, so I don't think it will enable at all in Park/Neutral..

Probably coincidence..