I have a 01 blazer, I don't know what to try next. It will turn over but not start. Sometimes it has spark but not all the time. Sometimes I can turn the key one click and the motor will turn over a little. I have replaced the crank sensor, the sensor in my distributor, ignition control module, and coil. I was told that it could be the ignition switch. Thanks for any help.

 

You should diagnose using the 98+ No Start article listed in the forum, it's very helpful. Also, use the search feature to find the many similar posts.

 

I looked over that. I had a crank sensor code replaced that. and many other parts. Sometimes it has a spark for a few seconds most of the time it doesnt. The motor will turn over a little bit when i turn my key one click. it never did that before. i have replaced almost everything except the computer, and ignition switch.

 

Did you test the wiring from the CKP to the PCM?

 

i dont know what those are?

 

As can be found with a quick search:
CKP==crankshaft position
PCM==powertrain control module

You can also search for the specific code you received that led to the replacement of the CKP sensor. Many of the codes are posted in the OBD2 code area within the Tech Article (DIY) section and the code sheets show a wiring diagram.

 

no i havent tested that. is that what is under my steering wheel?

 

No. You said you replaced the CKP sensor already... The PCM is located on the passenger side fender sitting on top of the coolant over flow tank.