1999 gmc

1999 GMC C3500
V8 • 4WD • AUTOMATIC
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J65720JC
  • MEMBER
  • 1 POST
have trouble starting my 1999 6.1 litre gmc truck motor. runs fine once it starts
Nov 18, 2010 at 9:05 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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MMPRINCE4000
  • CAR REPAIR CONTRIBUTOR
  • 8,548 POSTS
Start by checking fuel pressure with mechanical gauge, next spark.

Nov 18, 2010 at 9:08 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Do you hear the fuel pump come on when you turn key to run-if so check the fuel pressure to rule out the fuel filter and a weak pump if all okay -check if the injectors are pulsing if okay-test the coolant temperature sensor, fuel pump relay and trhe duel pump and oil pressure sending unit-could also be the injectors and fuel pressure are leaking dropping the fuel pressure causing the hard starts
Nov 18, 2010 at 9:10 PM