I had my radio installed and they did no hook up my light sensor to the z1. It is an 04 suburban, does any one know what wire it is from the car so I can hook it up.

YOU CAN RUN A WIRE FROM YOUR ILL WIRE TO THE DIAL ON THE LT. OF YOUR STEERING WHEEL. THE KNOB WHERE YOU CAN TURN YOU HEAD, PARK, AND AUTO LIGHTS. PULL IT OUT, WHICH IS SIMPLE AND TAP INTO YOUR PARK LIGHTS. NOT SURE WHAT COLOR WIRE. USE A VOLTAGE METER. THAT'S WHAT I'VE DONE ON 2005 YUKON.

Did you find an answer to this? If so can you pass it along. I have a similar question installing a Z1 in a 2003 Chevrolet Suburban. I need direction on how to best connect the Z1 illumination wire. Specifically so that the Z1 night illumination mode works in the following 2 scenarios. First scenario is when the dash lights are turned on "Automatically" (headlight switch in "Auto" position, it is dark outside, and dash lights come on automatically). The second scenario is when the dash lights are turned on "Manually" (headlight switch in "Park" or "Head" position, and dash lights come on). Thanks!

I followed this guy's install on my 03 Silverado SS....Iwould imagine it would work for you as well.....

http://www.avic411.com/forum/viewtopic. ... +silverado