Dazed,
The Avalanche does not have a chip in the key. A mistake I think that they made when my wife's venture has the key as standard equipment. The Escalade cluster is an easy swap, the only thing you have to remember is that you would have to have the mileage and hours swapped from the old cluster. Any certified shop or dealer should be able to do this for you for a nominal charge. We are having a raffle for an Escalade cluster on this site, $5.00 and you might win the cluster and $50.00 towards the installation.
PS Welcome to the site