<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>The pcm isn't connected to the cruise on the C1500, the VSS goes directly to
<BR>the cruise control module. The Helms manual may not reference the VSS to the
<BR>idle, EGR or purge possibly because diagnostics can't be performed in a
<BR>moving condition. The two major spark maps are controlled by mph and off idle
<BR>driveability is enhanced with VSS input. The VSS input is easily duplicated
<BR>for this pcm. What transmission are you considering using? Have you already
<BR>obtained the pcm and/or engine setup?
<BR>HTH's
<BR>AL
<BR>
<BR></FONT></HTML>