T Tiffany New member Joined Sep 10, 2010 Messages 4 Reaction score 0 Points 0 Sep 10, 2010 #1 1995 GMC Sierra 350 half ton. When I let off the gas thr RPM's drop to just about stalling then jump up again and idles around 500. I recently replaced throttle body and gasket. I will give 10 points for best answer.
1995 GMC Sierra 350 half ton. When I let off the gas thr RPM's drop to just about stalling then jump up again and idles around 500. I recently replaced throttle body and gasket. I will give 10 points for best answer.
