well, there's one other scenario... that i just realized... this programming instruction that i posted is from my 97 service manual.... i wouldnt think it has changed, but not sure.
what are the GM part numbers on your fobs?
Busy weekend, slow reply. Entering programming mode was correct, but whether that's how to program fobs, I can't say. Here are the numbers on the back of my fobs.
2016 Ford Fusion Energi Titanium - Still trying to figure out what I can do
2006 Mercury Mariner Hybrid - K&N Drop in filter. Not much else you can do...
TOTALED 9/2016 - 2004 Impala SS
SOLD 3/2013 - 2000 Grand Prix GT