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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1667
Experience:  GM Grand Master Technician 2007. 14 year experience.
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The service engine soon light is blinking and the truck is

Customer Question

The service engine soon light is blinking and the truck is idling rough
Submitted: 10 months ago.
Category: GMC
Expert:  Gary replied 10 months ago.

I am sorry you are having this problem

if you unplug one injector connector at a time at idle which cylinders injector do you unplug that the idle will NOT change at all ?

we need to know which cylinder or cylinders are dead