The Costco Auto Program predicts its holiday promotions will be even more successful this year, after recording the highest sales the program has seen during its winter 2014 special offer.

This time around, Costco is partnering once again with General Motors for the seasonal promotion, and it projects 20-percent growth in vehicle sales compared to last year.

The Holiday Sales Event offers additional savings and benefits to Costco members on popular models from Chevrolet, Buick, GMC and Cadillac.

Among the models being offered is the Chevrolet Silverado, which the company says is a model that has consistently come out in front during these winter events since Costco and GM first partnered up in 2011.

The promotion began Friday and will run through Jan. 4, 2016. Through the event, Costco members who register for the offer at CostcoAuto.com will be privy to GM Supplier Pricing and additional benefits on a variety of 2015 and 2016 trucks, SUVs, luxury and fuel-efficient vehicles.

The GM Supplier discount offers pricing normally reserved for GM supplier employees that is less than the MSRP. Furthermore, all qualifying manufacturer rebates and incentives will be applied to the transaction.

Costco also pointed out its Executive Members will receive a $700 Costco Cash Card, and Gold Star and Business Members will receive a $300 Costco Cash Card upon completion of eligibility requirements. Gold Star and Business Members may upgrade to an Executive Membership in order to receive the additional $400, the company shared.

The lineup will include popular models, such as the aforementioned Chevrolet Silverado, Cruze and Tahoe; Buick Enclave, Encore and LaCrosse; GMC Acadia, Sierra and Yukon; and Cadillac ATS, CTS and SRX. The complete list of eligible vehicles can be found here.

Taking a look back at last year’s GM Limited-Time Offer, Costco sold 43,400 vehicles with a 69-percent closing rate on the eligible vehicles. Costco pointed out this is more than twice the amount sold during the winter 2013 offer.

Trucks came out in front for sales during the 2014 offer, making up 39 percent of total sales. The Chevrolet Silverado and GMC Sierra were the most popular, with a combined 17,000 vehicles sold.

The crossovers were popular, as well, and the segment’s seven models represented a larger share of the promotional vehicles available; they represented 35 percent of total sales.

“Increasing consumer confidence coupled with falling gas prices last year helped crossovers, trucks and SUVs trend higher in 2014; so it’s no surprise that our special offer reflected the same results,” said John Conlon, Costco Services director. “We’re pleased to provide our members yet another opportunity in 2015 to purchase vehicles that meet their needs while providing great value and a quality, time-saving purchasing experience at the same time.”

And this year, the program is taking the promotion onto social media, as well. Costco is launching a social media quiz, titled, “Are You Driving the Right Car?” The quiz — similar to the personality-driven quizzes on Facebook — includes 10 questions about the driver’s personality to determine a vehicle recommendation from one of the four brands offered during the Holiday Sales Event, the company explained. The quiz will be available on most social media platforms during the promotion and posted on Facebook.com/CostcoAuto.