Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
I have a 2000 GMC 1500 Savana 5.7. 106000 miles
I have gone through many of you videos, very well done. I do not have a scope but am very familar with the use of VOM and test light. I have already replaced the Cap and Rotor, and CPS. I have no spark at the coil. I do have 12 V at the coil positive terminal and negative terminal is lighting with a test light with ignition on but no flash when cranking. The ICM is showing 12 V at pin A, pin C is showing solid light with test light, pin D is showing no light with the the ignition on and also no light or pulse when cranking. All fuses have been checked. Do you have any suggestions as to what next. I also did resistance checks on the coil and they seemed to be within spec. Thanks
If its not flashing then take icm out of distributor and ohm test it following the shop manual specs. Or visit
www.eautorepair.com
and get a subscription it will give you all the info you need to test it. I have had plenty of icm issues with gmc. Some parts stores will have a ignition control module tester so call a few parts stores and see. I am pretty confident that the icm is the issue in your case.
