Chevrolet 2008 TrailBlazer Owner's Manual page 317

Except 6.0L V8 (VIN
Code H) Engine
See Engine Compartment Overview on page 5-12 for
the location of the engine oil fill cap.
Be sure to add enough oil to put the level somewhere in
the proper operating range. Push the dipstick all the way
back in when you are through.
6.0L V8 (VIN Code H)
Engine
6.0L V8 (VIN Code H) Engine Only
Remove the engine cover to access the engine oil
fill cap:
1. Remove the screw in the center of the cover.
2. Remove the cover from the stud on the driver side.
3. Pull the cover up and off the bracket.
4. Reverse the steps to reinstall.
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