Services on 2004 GMC Envoy

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 .

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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; http://repairpal.com/automobile-owners-manuals-online
How many miles does your truck have? I wonder what is the dealer offering you? How did they call that service?