The Costco Auto Program announced early this week the top brands requested in the month of October by Costco members.

So who came in at No. 1 last month?

Costco said that General Motors’ brands overtook both Toyota and Honda, following the commencement of the Costco GM Holiday Sales Event, which started Oct. 1 and runs through Jan. 2. This promoties a special offer available for 17 select 2014 and 2015 models at GM Supplier Pricing and additional benefits, including all qualifying manufacturer rebates and incentives, and either a $600 Costco Cash Card for Executive Members or a $400 Costco Cash Card for Gold Star and Business Members, for completing certain eligibility requirements.

“Taking the No. 1 spot as the most-requested brand by Costco members confirms that we made the right decision in partnering with the Costco Auto Program to offer the Costco GM Holiday Sales Event,” said James Bell, GM’s head of consumer affairs. “Together, we were able to collaborate on a unique savings opportunity, featuring a diverse vehicle selection, GM Supplier Pricing and a Costco Cash Card offer that members find valuable during the holiday season. We’re excited to be a part of it.”

The promotion saw a 33-percent increase over the same first 30 days last year, bringing in over 17,000 Costco members registered for the event. The four largest increases in average daily requests, according to the program, were for trucks, SUVs and luxury models, with the Chevy Silverado, GMC Sierra and GMC Acadia rounding out the top three most-requested vehicles. The following three top most-requested vehicles for the month were also GM products.