2008 CHEVROLET EXPRESS VAN keyless entry remote must be programmed to your vehicle before it will work for you. Programming can only be done at an automotive locksmith shop or the dealership with the vehicle present. There are no onboard programming instructions available for 2008 CHEVROLET EXPRESS VAN remote. This keyless entry remote comes with Brand new battery and is tested for functionality before sending. The numbers on the back of the remote read 15913420.