Cargo Light LEDs for 2001-2006 GMC Sierra 3500 (Pair) XPR (720 Lumens) Diode Dynamics Volvo these are known to work

these are known to work well on cars like the newer VW MK5 Golfs

Upgrade your stock H11 halogen bulbs to Nokya H11 Hyper Yellow

An F1-style rapid flash module is also available

While they may be slightly pricier

Cargo Light LEDs for 2001-2006 GMC Sierra 3500 (Pair) XPR (720 Lumens) Diode Dynamics Volvo these are known to workUpgrade. Add more light output and a modern appearance to your backup lights with the 921 XPR backup bulb. Each of the four sides of this bulb is populated with 4 high power LED chips for maximum brightness. Housed in an aluminum casing with a textured finish for superior heatsinking properties the XPR will last for years to come. Best of all installation only takes minutes simply take out your factory bulb and the XPR will fit snugly in the socket.