1999 Other GMC Models bacfire

Tiny
JIMBENNETT
  • MEMBER
  • 1999 GMC
  • V8
  • 2WD
  • AUTOMATIC
  • 19,999 MILES
1999 gmc 6500 top kick propane fuel system loud backfire on take off need help
Saturday, April 18th, 2009 AT 9:13 AM

1 Reply

Tiny
MICKEY-D
  • MECHANIC
  • 304 POSTS
I believe you might have some moisture trapped in the propane lines, or in the fuel distribution valves. You might want to get a manual on this truck to troubleshoot it properly.
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Sunday, January 17th, 2010 AT 9:06 PM

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