My glow plugs have worked since day 1 , but I have this code that is popping up so I took off my heater and found out it was not working , soo with the heater unplugged i tried cycling the glow plugs and got no clicking from my glow plug relay , it's just that code that is killing me

Check and clear the codes again and then post the exact code please.

p0380 glow plug/ heater circuit A

http://www.justanswer.com/gm/2qktr-1...ine-light.html
https://www.dieselbombers.com/chevy-...094-p0380.html
glow plugs - SixFiveTurboDiesel.com

None of those do help me I have glow on all my plugs, those are all different problems

There are only so many soloutions to that code,I expect you can use google as well as I can so at this point I am stuck for an answer with the info you have given.

Ok thank you very much for all your help it is well appreciated

What is the gm part number for my connector that goes into my computer that I need for my high idle switch ? I tried to get them to get me one but they said they need a part number ??

Ask a dealer to look up the terminals.
Delco 96+:12089649
napa 95 older:NW 725180