Buick LaCrosse Owner's Manual page 416

5. Push the new canister into
place.
6. Screw the connector (B) to the
canister (A).
7. Slide the plastic cover back on.
If the vehicle has the tire sealant
and compressor kit shown above,
see the operating instructions that
follow.
If the vehicle has the tire sealant
and compressor kit shown above,
follow the operating instructions
under "Tire Sealant and
Compressor Kit (With Pressure
Relief Button).