I agree with the above comments. It was about a 6 second start which is a little long but it really depends on the age of the engine, the ambient temperature and the battery
(and battery leads) condition.
If the engine is getting long in the tooth, it could possibly
do with head
recondition and an injector test. Both of these are straightforward jobs.
However it sounds OK as is to my ears.
If the cold start was say longer than 10 seconds with an ambient of 10+ degrees C and a good battery then further investigation is warranted (IMO).
but easy maintenance
item on the 1GM10 is keeping the raw water cooling
zinc replaced as required (i.e. regularly/yearly or sooner) and removing engine scale every 5 or 10 years unless used in freshwater only (again - straightforward maintenance