Express van won't start in cold

Raymond_Schwalb
Sat, 12 Jan 2013 03:47:39 +0000
Maintenance/Repairs

My 2006 Chevy Express 3500 (cutaway) 6.0L won’t start when the outside temperature is below 35 degrees. Warmer than 35, it starts right up. Seems to be a fuel problem, as it fires, but doesn’t keep running. I can start it by fooling around with the position of the gas pedal, but usually it takes a few minutes of cranking. My mechanic thought it was low fuel pressure and replaced the fuel pump- a thousand dollars later, it is no different. Any thoughts?

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