this should help you
Suzuki Vitara, Grand Vitara, XL7 2000-06
NOTE During these procedures, identify all components removed from the engine so that they may be reinstalled in their original positions. If discarding the old components so that new components can be installed, identifying the old items is not necessary. 1.6L 16-Valve Engine
The 1.6L 16-valve engine is known as an interference motor, because it is fabricated with such close tolerances between the pistons and valves that, if the timing belt is incorrectly positioned, jumps teeth on one of the sprockets or breaks, the valve and pistons will come into contact. This can cause severe internal engine damage.
WARNING Do not rotate the crankshaft counterclockwise or attempt to rotate the crankshaft by turning the camshaft sprocket.
FIG : Camshaft timing marks-Suzuki Sidekick, Vitara and X-90 1.6L 16-valve engine
FIG : Align the punch mark with the arrow for proper timing belt installation-Suzuki Sidekick, Vitara and X-90 1.6L 16-valve engine
FIG : Rotate the crankshaft clockwise until the camshaft and crankshaft timing marks are aligned-Suzuki Sidekick, Vitara and X-90 1.6L 16-valve engine
this don't have a belt..it has chains,and shouldn't need to be replaced
2.5L, 2.7L Engine