I have a 2005 Chevy Silverado 1500. I am not getting voltage to fire the coils for the plugs. Any ideas?

Asked by Jun 10, 2015 at 07:01 PM about the 2005 Chevrolet Silverado 1500 Long Bed 4WD

Question type: Maintenance & Repair

I have changed the camshaft
position sensor and crankshaft
position sensor.  Fuel pressure is
58psi not cranking and 64 psi
cranking.  All fuses are good.  Truck
does have yellow check engine light
on.  Put code reader and it says that
no codes are stored in module.   It
does see 4 modules and it says only
3 are Ok.  Coil packs do have the
supply voltage of 12 volts on all 8
coils.  There is no signal(the 5volts
needed to fire coil) being sent to the
coil.  Any ideas out there.  Engine is
a 4.8L.

1 Answer

210

So basically you are getting no spark? You must test for controls, the switching on and off of the coil.

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