Lost every GMC key?
Many GM trucks from the Circle Plus years relearn keys on a timer: new key in the ignition, security light lit for about ten minutes, repeated three times. That half hour is written into GM's procedure rather than added by us, so plan on it rather than a quick in-and-out on a Sierra, Yukon or Savana with no key left.
The lost-key charge adds $60 to the key, covering the cut data from the VIN and programming from scratch. Proof of ownership is required: title or registration, with a matching driver's license or ID. When the relearn finishes, the missing key no longer starts the truck, and wiping it costs nothing extra.
What the dealer charges, and why
A GMC dealer charges for the part, then adds $100 to $180 for programming, which puts a chip key near $230 and a Denali smart key near $440. A truck with no key gets towed in beforehand ($125 to $200), and a crew truck can sit for one to three days when the fob is on order.
For a business, the idle truck usually costs more than the key. We program at the yard or the job site, quote every truck by VIN before we drive, and charge for each key only after it starts its truck.
Two things we say on the phone first
Keep a second key. A spare Sierra or Savana key is $125 while one still works, and losing the last one adds $60, the relearn wait and a truck parked until we arrive. Online remotes are the other trap: a Sierra remote and a Sierra smart key look alike in photos and are different parts, so read us the FCC number from the case before paying anyone to program one.