03 Hd 6.0 Surging When Heat Turned On

By ToddZ
October 26, 2007 in Ask A GM Technician

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ToddZ

Posted October 26, 2007

I have noticed that when my fan is turned on whether I have the temp set hot or cold, when the fan kicks on and off, the truck surges quite a bit almost to the point where it sounds like it is going to die. Is this normal? I will add that I have been driving the truck around with no tailpipe for a while... Just muffler and nothing after that.. i meant to have it finished but never found the time or the $$$$.

Any suggestions would be great!

thanks!

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