Justin, I would agree that the newer alts have the sensor wires etc but all 125 amp GM alts all still suffer from minuscule amp outputs at idle, unless smaller diameter pulley'* are used, or you buy an alternator built to 120 amp+ at idle specs.
It is simple to tell how your battery & alternators charging system it truly doing....
At night with lights shining against a wall at 25 feet back....
Turn on your wiper'* on low, your heat/fan on high, rear window defog on, stereo on and hold your brake pedal down while in park at idle....
Now step on the gas to about 1800 rpm, If your lights brighten up....at 1800 rpm and then go dimmer back down at idle, you know that your system would benefit from an improved custom built alternator.
Even with my Odyssey battery..I fail too at idle.
1997 Buick Pk Ave (Soft Ride) Suspension!