2004 GMC Yukon Denali Q&A
2004 GMC Yukon Denali Question: Low beam headlights won't come on.
Do your brights work? If they do then it is most likely a switch or light module problem. here is a link to an online repair manual site, that will have the wring diagrams to use to inspect your problem. http://bit.ly/mitchell_repair_manuals_online - dandd