Automotive News reports that General Motors issued a message to dealers on Wednesday, outlining June promotions for its Chevrolet brand.

GM has seen its market share erode in the first five months of the year, falling to 15.7 percent in May to narrowly eclipse Ford at 15.3 percent. Its Chevrolet brand dropped 1.7 points to 11 percent for the month, placing it at No. 3 behind Ford and Toyota.

GM has attributed its May slide to a reduction in fleet deliveries and production issues resulting from the April earthquake in Japan.

In the e-mail, Chevrolet U.S. chief Brian Sweeney indicated that May sales “did not deliver the result we planned for,” adding “Now, it’s time to close out the second quarter and defend our position as the fastest growing full-line brand of 2016.”

In June, GM will introduce a number of incentives, including:

  • A Truck Month promotion, offering 0 percent financing for 60 months plus up to $8,250 in cash and rebates on the Silverado crew cab.
  • 20 percent off the sticker prices of high-end models of the 2016 Impala, Sonic and Spark through June 15.
  • $750 in cash as a conquest promotion for owners of non-GM vehicles until June 15.
  • An additional $500 on top of the conquest offer for Cruze and Malibu.

Advertising campaigns supporting the redesigned Cruze and Malibu will also be accelerated to coincide with the promotions.