Upgrading the Interior Dome Lights on 2005 GMC Sierra rentry.co

Before purchasing LED bulbs, you need to know the correct sizes for your 2005 Sierra. The dome light (center overhead light) typically uses a 561 or 578 bulb, often called a "festoon" style with contacts at both ends. The map lights (if equipped, located in the overhead console or near the rearview mirror) usually use 194 or T10 wedge bulbs. The cargo light, mounted above the rear window on the outside of the cab, also uses a 561 or 578 festoon bulb. Some trims have additional lights in the rear cab pillars or under the dashboard. Check your owner's manual or remove the existing bulbs and match them to LED equivalents. Many online retailers offer complete LED interior conversion kits for the 2005 Sierra that include every bulb you need.