I have Spicer u-joints on my Colorado. I've greased them around 5-6 thousand miles so far. What is the normal interval for doing this?
Most vehicles I have owned that have zerk's have stated 15 to 30k. I do mine at every oil change which is around 5k miles.
If they say 3k then they expect you might do it every 10k. Maybe every 3k as they nearing end of life.If Spicer says 3k...until you learn different.