: Tune up check list for 05 STS Northstar

11-21-11, 10:33 AM
What needs to be replaced for my 100,000 mile tune up? Can I do it myself?

11-21-11, 10:39 AM
8 AC-Delco spark plugs is all that I can think of. And only AC-Delco. Maybe check the engine air and cabin air filters.

11-21-11, 11:25 AM
The owner's manual will say this about the 100,000 mile maintenance
Inspect fuel system for damage or leaks.
Inspect exhaust system for loose or damaged components.
Replace engine air cleaner filter. See Engine Air Cleaner/Filter .
Change automatic transmission fluid and filter (severe service). See footnote (h).
Change automatic transmission fluid and filter (normal service).
For all-wheel-drive vehicles used for trailer towing: Change transfer case fluid.
Throttle body service. An Emission Control Service. See footnotes and (l).

11-29-11, 01:07 AM
Thanks guys. I was about to get charged $300 for plugs and fuel filter change. They said nothing about the xmission fluid.

12-01-11, 10:58 PM
And if you search this forum, you'll find the transmission drain/refill & filter change isn't bad, just requires some planning ahead.