It is an extension of the Amazon Key service that allows customers to get deliveries inside their homes.
Amazon customers in the US who have certain GM or Volvo cars can now have their packages delivered to their vehicles and left locked in the boot.
Last year, Amazon launched Amazon Key, enabling the e-commerce giant to unlock customers' front doors and leave packages inside their homes. There are no stats on the frequency of the modern-day crime of opportunity but plenty of anecdotal evidence.
Auto owners download the Amazon Key app and use it to link to their connected vehicle service.
Amazon stresses that it will authorize the delivery driver before your auto is unlocked.More news: Opera announces a brand new mobile browser for iOS and Android devices
The service is Amazon's latest push into areas that were once considered no-go zones for delivery drivers and postmen.
Amazon's FAQs about in-car delivery don't explain all the technical details of how delivery works, but CNN tech reporter Matt McFarland says Amazon Key In-Car uses a car's internet access to remotely open a customer's trunk.
Amazon says it will not deliver to private parking garages or other places where access to a vehicle is not readily available.
"Porch pirates", people who walk off with deliveries left outside homes, are a problem in my Washington, DC neighborhood.
"Unlocking Amazon Key In-Car delivery for more than seven million Chevrolet, Buick, GMC and Cadillac owners is another great example of how we are leveraging the embedded connectivity in our vehicles to provide our customers with services that make their ownership experience more valuable", said Alan Batey, President, General Motors North America.More news: Benoni not affected by Saftu strike
With better package security being one of the main benefits touted of the service, a critical point of this service will be, effectively, whether customers can trust Amazon with the keys - and that's in terms of cybersecurity, trustworthiness of personnel, and system malfunctions. Customers can track when their auto was unlocked and relocked in the App's activity feed, and rate their in-car delivery. Packages will be placed in cars parked in publicly accessible areas like a customer's home or workplace, and then secured.
Interestingly, though, Post&Parcel has been running an online poll about alternative delivery options for food and meals - and deliveries to the vehicle boot has so far proved to be the least popular, attracting just 7% of the vote. And no special access or keys are given to the driver. For added peace of mind, in-car delivery is backed by Amazon's Happiness Guarantee.
"Receiving a package securely and reliably in your auto, without you having to be there, is something we think many people will appreciate", said Atif Rafiq, chief digital officer at Volvo Cars.
Customers need to own a supported vehicle.More news: Auntie Pippa pops in to see baby prince