Engine Mechanical problem
1999 Chevy Suburban V8 Four Wheel Drive Automatic 145000 miles

I have a '99 suburban. About a year ago I had both batteries replaced, and the starter motor. I am (50% of the time) getting a click and no start. Continues attempts to start has so far worked and the starter will engage and start normally. I checked both batteries for corrosion and loose terminals, they seem ok. There is no loss of electrical power to any accessories. Before I rip out the starter to have it checked, is there anything else I should look at ?

Two days before this began the passenger rear directional died. Looks like the multi function switch or wiring harness. These two circuits are not connected are they?

sounds like a starter. they shouldnt be related. did you check the bulbs