Truck problems

6 CYL • 4WD • AUTOMATIC
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2004DEUCE65
  • MEMBER
  • 1 POST
I have a 1999 gmc sonoma 4.3 litre no spark while cranking the engine over
Jan 25, 2011 at 11:00 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Key on, did you check for primary voltage at the ignition coil and injectors, pink wire. If no voltage check the ecm 1 fuse-- 15 amp in underhood fuse box. The circuit goes hot when you turn on the key, you don't have to crank.
Jan 25, 2011 at 11:13 AM
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