Could also be your engine is now burning oil.
I did that mod. No more oil in my tube.
But I still burn oil.
I check my oil level weekly.
Im close to 150,000 now.
Burning about 2-2.5 qts every 5,000 miles.
GM considers 1 qt every 2000 miles- as 'normal'.... but thats a whole other discussion.
2010 FWD LT1-Gold Mist Metallic- seats 8
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.
2013 Equinox 3.6L 83,000
2010 Traverse 3.6L 148,000
2003 Trailblazer 4.2L 181,500