I also have a Nexus 4 and never used anything but the stock vanilla Android 4.2.3 and now 4.3. Ever since I've had my Cruze I've had issues dialing using the voice command in the car. If i directly dial from the phone it works with the car's speak system. I also notice once I dial out successfully through the phone I can then use the car's voice command system to dial out. Has anyone contacted GM or hear anything new with this issue?