- Feb 27, 2015
- 579
My sister just bought on 04 Suburban Z71, is the 4-high headlight mod done the same on it as the 03-06 Silverado/Sierra (diode between high and low beam relays) or is there another method required, if another method is required is it possible to maintain the automatic headlights when doing it? I haven't had a chance to check out the fuse blocks and can't find anything that specifically talks about the tahoe/suburban platform. I've done the diode mod to my dads old 03 2500HD and my 03 Trailblazer (at the BCM) would like to do it to her's too.