my last van, although a 2004 ford e350 with a 6.0 powerstroke diesel had no problems getting warm inside even without a rear heater.....the front would warm up within just a few minutes of starting the van.
sounds like somethings not right with your PD van. perhaps flow ? t stat not working right ?
thats alot of idle time for it to warm up
'12 gmc sierra 2500 dmax slt carbon black.
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