The '03 and early '04 does have a vacuum pump. It is located on the passenger side at the finder and firewall. If you have had a break in the line it will cause the pump to run all the time and will burn up the pump.
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How does the cruise control work?
Can someone tell me how the cruise control works on a 2004.0 manual transmission truck? Does it work off a vacuum pump?
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I do not have a picture but this thread does.
http://www.cumminsforum.com/forum/2003-2004-general-discussion/557237-need-help-identifing-part.html
http://www.cumminsforum.com/forum/2003-2004-general-discussion/557237-need-help-identifing-part.html
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