My 96 suburban has had a few problems here lately.... 1st. having a hard time starting.
When I bought it 5 yrs ago the previous owner told me I might have to replace a battery.
Well sure enough I did, everything was fine for a while after that. but here lately having a hard time starting.
Thought it might be alternator had another one so... I changed it.
But the problem continued, so I went to auto zone to have them check the alternator and battery's.
It turns out that the battery's are fully charging but reading that there no good... got a 2nd option just to make sure from Advance Auto parts... same reading so, had to buy one battery because I was still in two years of buying battery.
Have them changed out and everything is cool.... well this morning while starting the truck seem to be doing the same thing?
My thoughts, it has to be the starter, but needed some guidance?

 

check your grounds and where the 2 posivive cables are together on the battery put a small washer between them it may requier a longer battery bolt and make sure the engine ground is connected to the frame

 

Check your grounds.

Try jumping starter if nothing happens yea it's probably the starter