Winter storms, a strong November and one less selling day than in December 2012 combined to keep the lid on US light vehicle sales last month as year on year market growth was limited to 2,602 cars and trucks or barely 2%. The seasonally adjusted annualised sales rate (SAAR) came in at 15.4m: well below analyst expectations of 15.8-16m and just 160,000 deliveries ahead of 15.24m a year ago.