Chevrolet 2007 TrailBlazer Owner's Manua page 403

For engine oil crankcase capacity, see Capacities
and Specifications on page 513.
Notice: Do not add too much oil. If the engine
has so much oil that the oil level gets above the
cross-hatched area (F) that shows the proper
operating range for the L6 engine or above
the cross-hatched area for the V8 engine,
the engine could be damaged.
Except 6.0L V8
(VIN Code H) Engine
See Engine Compartment Overview on page 396
for the location of the engine oil fill cap.
6.0L V8 (VIN Code H)
Engine
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.
SS Model Only
Remove the engine cover for access to the
engine oil fill cap as follows:
1. Undo the screw in the middle of the cover.
2. Pop the cover off of the stud on the
driver side.
3. Angle the cover up and pull it off of the
bracket.
4. Reverse above steps to reinstall the cover.
403