Investigators say the truck was stolen last Thursday while the real driver got out of the van.
A man jumped in, and drove it to a home where the California Highway Patrol says Steve Ackelbein helped unload 71 packages inside.
RELATED: Package thefts on the rise as Amazon Prime Day deliveries head to residents
Officers found the truck and arrested Ackelbein the next day on several charges.
The CHP says the man they believe stole the truck is 48-year-old Charles Farmer who is still at large.
Only one of the 71 packages have been recovered.