The factory third brake light on your 2006-2007 GM 6.6L is often overlooked, but upgrading to an aftermarket LED third brake light can make a surprisingly noticeable difference for your GM 2500HD/3500HD build. Whether you're replacing a failing stock light or looking for enhanced visibility and style, Alligator Performance offers a range of LED third brake lights to suit your needs. Featuring easy installations and greater in overall light output, these featured lights are designed to provide hassle-free lighting and styling upgrade for your GM. Pair your new high powered 3rd brake lights with our selection ofTaillights!GM Duramax Fitments: 2006, 2007 GM 6.6L Duramax.Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali.Some exceptions apply, please see individual product pages for specific fitments.