While you're probably still digesting that extra serving of holiday cookies, here's something else to chew on – GM says some 2017 Cadillac XT5 and GMC Acadia SUVs will have diminished braking ability because of hydraulic fluid leaks. Engineers found an oversized front caliper piston bore had allowed the piston seal to leak hydraulic brake fluid and it was determined the oversized bore can prevent the proper compression of the caliper piston seal.
GM says a red "BRAKE" warning light will come on when this happens. So if you see that, stop driving as soon as possible – which in these SUVs could take quite a while. The bad caliper assemblies are on Acadias built between 04/19/2016 and 04/22/2016