Q: Services on 2004 GMC Envoy

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I would like to know if there are any maintenace that I should have done to my Envoy after I just had it for 5 years for example, like should i or do I need to get the coolant, brake fluid flush and the clean injector done. or are the dealers just trying to get my money for something that doesnt need to be done .
(1) Answer
People drive their vehicles in different ways, your vehicle may be equipped with a CHANGE ENGINE OIL light that indicates the Scheduled Maintenance. I would take a look at the owner's manual and learn about the additional required services depending of your current mileage. Find your owners manual "free" here;
How many miles does your truck have? I wonder what is the dealer offering you? How did they call that service?