1997 chevy blazer s10 cranks but wont start

Do the dash lites come on when you turn the key on? Are you saying the starter doesn't crank?

I'd have to be sure the battery has a full charge and battery connections all clean and tight.

The starter has two voltage circuits, one is hot all the time, the other circuit, sometimes called the starter s terminal, goes hot with the key in the crank position and is wired through neutral switch, if auto tranny. Did you try cranking it in neutral?

Have you had it scanned for codes?

poss. the crank sensor

the dash sound's like a fuse, check the fuse box under the hood and in the door jamb on the side of the dash, also check your fuel filter and fuel pump, im betting on the pump because i have a 2001 chevy blazer that has had two replaced and it has 233000km on it!

underhood relay center has fuel pump fuse

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If this is third tranny ,I would start to begin thinking of a computer problem.I woyld find it hard to beleve that 3 trannys in a row are the fault.

sounds like the starter is bad

i know what you mean i have the exact same problem with my 97 blazer. it takes for ever to get up to speed and in gear,but if i shift from 1st to 4th on my own it runs fine! i dont understand the key thing either but my husband took off the plastic around the sterring coloum and therer is a little button under the iginition and if you press it in key will turn over and come out!!!! its so weird cause sometimes i crank the truck up and it takes off like it has never had a problem,and as soon as i turn it off the key comes out . then the very next time it will happen again!!!!!!!! let me know if you find out th e reason!!!!!!!!!!!!!!!!!!1

Has anyone tried lubricating & or adjusting linkages/cable?

There are no free full diagrams on the net, you need to charge and test the battery, clean the battery cables and run a voltage drop test as well, replace them if the are badly corroded. Kragen will test the battery for free.