Send me a pm with all the details wrt your fuel economy issues, including who you talked to (dealership & customer assistance) if you have recorded that info.
As for the mirror tilt, have you gone through the configuration menu in the vehicle? Last time I had a Tahoe, the process for configuring the mirrors to tilt on reverse is to go to the button that looks like a pair of check-boxes
and cycle through the menu choices. Every Tahoe I've driven in the past several years has had the ability to set the mirrors for curb-tilt. I can't imagine that we'd do it differently for the hybrid unless it really is tied to the seats. The hybrids do have unique front seats.
Peace,
Martin
I am NOT the official voice of GM with respect to Hybrid issues
I am NOT the official voice of GM with respect to Hybrid issues
I am NOT the official voice of GM with respect to Hybrid issues