Summer’s here, and it’s never been a better time to please, please buy one of our cars, General Motors wants buyers to know.

The automaker plans to roll out a host of incentives during the month of June, Automotive News reports, to make up for a month that saw combined sales at all of its divisions sink 18 percent year-over-year.

The promotions, mostly targeting Chevrolet buyers, were outlined in a letter sent to U.S. dealers yesterday by Brian Sweeney, the brand’s U.S. chief. In it, he said May “did not deliver the result we planned for.”

May was a bad month for most automakers, but GM had it worse for a variety of reasons. A decrease in rental sales, something GM planned as part of its long-term sales strategy, ate into deliveries. Also, a series of earthquakes that hit Japan’s manufacturing heartland in April led to supply chain disruptions, forcing GM to idle four assembly plants.

The sales slowdown caused GM’s market share to plunge to its lowest in decades — 15.7 percent, narrowly beating out Ford.

Sweeney doesn’t want a bad May to bring down the brand’s second quarter sales numbers, so he called on dealers to “defend our position as the fastest growing full-line brand of 2016.”

One of the promotions will promise zero percent financing and $8,250 in dealer cash on some Silverado crew cab models. Until now, incentives on full-size GM pickups lagged that of its rivals.

Through the middle of the month, Chevy will offer 20 percent off the sticker price of its 2016 Impala, Sonic and Spark models, and offer $750 cash to owners of non-GM vehicles. The automaker will add an additional $500 in cash to its redesigned Cruze and Malibu sedans, and boost their advertising.

[Image: General Motors]