1999 GMC C7500 Topkick C7H042 7.4L No Start
Randomly crank no start when you let of the key it will backfire, cycle the key and it will fire right up and run smooth, cycle the key the next few times and it will start fine?? When you are cranking and it will not start and you inject propane it will start...
FIX posted 5/5/2012
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Vehicle Data1999 GMC C7500 Topkick C7H042
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Vehicle Data
1999 GMC C7500 Topkick C7H042
VIN | 1GDJ7H1D4X |
Engine | 7.4 L / 8 cyl / GAS |
Delivery | Fuel Injection / SEFI |
Emissions | OBD-II Compliant |
Symptoms | No Start |
Occurs | Intermittently |