Crank no start

Hello, I'm Danny.

Yes, it sounds like you might be having a fuel pump-fuel pressure issue. Your fuel pump might be weak or failing and not supplying adequate pressure causing this issue. Here is a tutorial for you to view showing how to test fuel pressure:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

If you don't have access to a fuel pressure tester most auto parts stores have a tool loaner program and can rent you one. The fuel pressure specification should be 9-13 PSI with the key on and engine off. Get back to us after testing and we'll go from there. Hope this helps and thanks for using 2CarPros.

Hello again.

It sounds like you might be having a ground issue at the fuel pump-fuel tank area. The 88-98 obs trucks are notorious for this happening. Here is a tutorial showing how to check wiring:

https://www.2carpros.com/articles/how-to-check-wiring

I've attached the fuel pump wiring diagram below for your truck. The first thing I would suggest is to check the fuel pumps ground to make sure its not loose, broken, corroded, or otherwise damaged. Get back to us and let us know what you find and we'll go from there. Attached is a picture of my 1989 K1500 below. Hope this helps and thanks for using 2CarPros.

Danny-

Hi,

I noticed it has been a couple of days since we heard from you. Has any progress been made? Also, I read through the thread and if you have good fuel pressure, that isn't the issue. So, yes I recommend checking for spark when it won't start. Here is a link to help with that:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Also, if it won't start, see if it will if you use starting fluid. If it starts and then stalls, then we know it is fuel-related. If it still won't start, then it is likely ignition-related.

Now, if there is no spark, there is a good chance the ignition control module is bad. What I need you to do is perform the tests listed below in the attachment section.

Also, if you haven't already, check to see if there are diagnostic trouble codes stored in the system. This truck has an OBD1 system. You don't need a scan tool to check it. All that is needed is a short jumper wire or even a paper clip. Here is a link that explains how to check for codes:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

If there are codes, let us know what they are.

Let us know what you find or if you have other questions

Take care,
Joe

See pics below.

You're welcome!

We are glad to hear you were able to fix the issue. Thanks again for using 2CarPros and we hope you will use our site again in the future when needed.

Danny-