The factory squad will field a pair of the Pratt & Miller-built cars in the highly competitive PWC GT class next year for Andy Pilgrim and three-time and defending series champion Johnny O'Connell.
"I feel it's our responsibility as the constructor to make sure it's right," Cadillac Racing technical program manager David Caldwell told Sportscar365.
"If the marketing side determines that we will expand out into customer teams, I see '15 as our opportunity to make sure we have a great car for that.
"At this point in time, we have no official plan put together [for customer cars]. We've had a couple of questions come at it from different privateer teams, but we don't have a schedule like that."
The car, powered by a 3.6-liter twin-turbo V6 engine, turned its first laps in mid-August before being sent to France for the FIA's Balance of Performance test.
Caldwell would not disclose the extent of its testing since, other than confirming multiple tests at multiple locations with both drivers.
"We can do all the testing we want, but we need to go race it," he said. "We're excited to have the opportunity to race in World Challenge next year.
"We'll get through the year and hopefully everyone will be satisfied with the results and we'll have confidence that we have a good GT3 car."
While customer cars could be on the agenda for 2016, so could additional races for Cadillac Racing as a team, thanks to the flexibility of the GT3 platform.
Could Cadillac be interested participating in events such as the NÃ¼rburgring 24? Caldwell wouldn't comment although said one-off international events remain options for the future. Sportscar365.com