I have a 1997 P3500 step van with a 6.5 diesel engine/not turbo.

Tiny
OVERWORKED
  • 1997 GMC
  • 14,300 MILES

It starts and runs very well, then after a few minutes, white/gray looking smoke starts to go from light to heavy, but it still runs fine. What is causing this? I have been told that it could be EGR vaulve, but it is ok. Where do I look next.

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Saturday, September 10th, 2011 AT 1:26 AM

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Tiny
JACOBANDNICKOLAS
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  • 68,398 POSTS

Make sure your vehicle isn't using coolant. Check fuel pressure.

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Saturday, September 10th, 2011 AT 1:30 AM

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