Question about 2003 GMC Sierra C/K3500

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2006 gmc 5500 8.1 liter propane

Esp when under load , feels like eng miss , no codes , im a ford tech by trade so im thinking maybe a coil pack going bad ,what is the correct way to test gmc coil packs and are there any other things to look for shouldnt it be throwing a code obd2 cant find 5500 on list so i put closest vehichal i could find thanks forvyour help

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Check with gm dealer on possible related bulletin for injectors

Posted on Nov 23, 2008

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