I was at the base auto hobby shop today doing an oil change and I notice these slits in the rear struts. Is this bad or something I need to repair right away?

 

That's the plastic boot that protects the strut's shaft from dust/dirt/water. It's not a safety concern, though as the boot continues to degrade, road "stuff" entering that area could shorten the life of the strut. Most people (i.e.: GM owners) would just ignore this condition and replace the boot when the shock needs replacing. The boot is not hard to replace if you have access to a spring compressor and basic hand tools. If you have access to a base auto/hobby shop you should have access to all the tools (and advice) you would need for the job. If you go for the replacement and the Max has over 50K miles on the odometer, consider replacing both rear struts and dust boots.

 

Cool, I really appreciate the response, I was getting worried.

Thanks!