Lost every Terrain key?
No key left for a first-generation Terrain means a VIN lookup for the key code, milling the HU100 blade in the van and coding the chip beside the car: $225 for the flip key, $205 for the plain chip key. Nothing waits on a parts order.
For a 2018 or newer Terrain the lost-key price is $289: a new fob, its hidden blade cut to fit the driver's door, and programming. Proof of ownership comes first, registration or title matched to a photo ID, and the missing fob is struck from the Terrain's key list at no charge once the new one works.