Have a VX Berlina LS1 wagon. Has progressively developed an issue when trying to start. When I turn the key I hear a loud click from the starter motor but no cranking. After several attempts it will crank, fire and run. Before I start this is NOT an immobilizer issue so please don't suggest that as it is totally unrelated. This issue has gone away for periods of time and then returned. I recently changed the starter motor which made absolutely no difference whatsoever. I have also tried another battery which made no difference either. Battery terminals are tight, earth straps are done up to the body near the ABS unit. Can see an earth connection on front of driver's side head but can't see any others elsewhere, not sure where to look for them on an LS1. Also have recently noticed my battery light coming on and charge voltage spiking to 15.5V so wondering if the two issues are related. Anyone else had this issue and successfully diagnosed it?