2015 Chevrolet Colorado - do I really need add-on services?

Every time I go to a dealership to have an oil change, I have to say ‘no’ several times to add on service offers. Do I really need to change all the fluids , filters, etc. they pitch to you?

Probably but here’s a link to your truck’s recommended maintenance schedule, which can also be found in your Owner’s Manual. https://my.chevrolet.com/content/dam/gmownercenter/gmna/dynamic/manuals/2015/chevrolet/colorado/2015%20Chevrolet%20Colorado.pdf I’ve had experiences when an oil change shop insisted on rotating brand new tires or performing a coolant flush that had already been done. The guy recommending the service is just looking at a list and trying to make a sale.