@roscodick It turns out that enabling IntelliBeam in the Tahoe/Suburban is a slightly different process than in the Cadillacs, so my apologies for that.
To enable the IntelliBeam system, with the turn signal lever in the neutral position, turn the exterior lamp control to AUTO. The blue high-beam on light should appears on the instrument cluster when the high beams are on. Also, the system only turns on the high beams when driving over 40 km/h (25 mph).
Does any of that help?
