Suzuki had different offset alternator brackets for the 8v & 16v, 1.6L engines. If your Sidekick has the 1.6 engine; do you know the history of the replacement engine? If the engine is a 1.6 & you don't know the history, possibly someone, with access to both 1.6 configurations, could have put on the wrong brackets. This is why I asked if you had a Sport model, as to the best of my knowledge, the 1.6 was never installed in the Sport.