i dont know what its the problem some times when im in park and then put in to reverse the rpm goes low than 700 and then stop the car and no power at all. so i need to go back and then make the same process but press first the brake pedal and a litle gas pedal put it in to the reverse and give it some gas and thats the way it dit'nt shot down can some one plese give some help here?

i have starts problems too. i need turn the key like 2 or 3 times to start the car some times i need to hear the gas relay.first i hear the fuel punp like 2 second and 1 relay click and then turn more my key to hear the second click and wait like 1 second and make the full key turn some times it works i know it its not normal but i dont'n know if this its couse the reverse problem .
please help.

I've had the gear problem with mine, and I know what cured mine.

My shifter hit my key ring which it turn sometimes kills the ignition for a moment.

The fix for me could have ben change my key ring, but I ended up adding a couple of mure keys which also cured the problem

i will check that.

If that doesn't work, I'd be willing to bet that it is your fuel pump. I have a 97 that is having the exact same problem (sometimes no start, sometimes it starts after 3 or more tries, sometimes the engine dies when I but it in gear). No column shifter here though. The pump would work intermittently so I'm in the the middle of changing it right now. Just have to wait till the wife gets back with the other car so I can go get a part.

Also, any problems with your fuel gauge? What year is your Blazer?

let me nkow if you fix the problem.

What year is this?

Well duarte guess what. It didn't work. And today I got a new problem to go along with the others... The Blazer shut off for about a second (no dash lights) and then the dash lights came on + the air bag light and buzzer while driving home, twice within 10 seconds. The first time was right after using the turn signal. After going through old threads I am now thinking it is an ignition switch problem. It seems to be a re-occuring theme with the 97 Blazer. I'm not sure if that holds true for yours (96 4D 4x4). But, I am sure one of the gurus here could answer that one.