I realize this is an older thread here but question for those who have unplugged the brake booster sensor.....I unplugged my on my 2011 Tahoe. When I started the truck, service brake soon blinked and it clear when I switched dash buttons. Anyhow I drove it around and I never got any check engine light or code. But I could see on the dash it still switching from v8 to v4 when I would coast. Hard to tell when I hit the gas.....But the question is, with this method will the dash still switch like normal from v8 to v4 but in reality the afm is disabled? Or does it not not work on the 2011?
I believe the brake pressure switch is a trick for the 2015 and up trucks but even then I don't know that it's worth putting today's modern over engineered braking systems onto a default mode over stopping afm.
if your dash is showing 4cyl mode, it's going into 4cyl and it didn't work.