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2003 GMC C6500 Topkick C6C042 8.1L Backfires Under Load
Posted to GM Driveability on 5/13/2014 13 Replies

I've been working on 03 topkick with [...] is backfire under hard load,[...] off the bat I found intake duct rubbed through from drive belt.I thought easy [...] with same result.i smelled fuel so hooked fuel pressure gauge to ck if pressure was leaking [...] m...

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  Related Documents & Media  2003 GMC C6500 Topkick C6C042

 
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car Vehicle Data

2003 GMC C6500 Topkick C6C042

VIN 1GDJ6J1E83
Engine8.1 L / 8 cyl / GAS
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsBackfires Under Load
OccursOn Accel
Message Closed

car Vehicle Data

2003 GMC C6500 Topkick C6C042

VIN 1GDJ6J1E83
Engine8.1 L / 8 cyl / GAS
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsBackfires Under Load
OccursOn Accel