I just bought a '94 C2500. My Dad checked it out and bought it, as I am out of state right now, so I haven't seen the truck yet. Getting ready to order some tuneup parts, I checked the VIN...engine code N...seller said it had a 5.7, but the VIN calls for a 7.4. So, what do I look for to tell? Here's some pics. I ~think~ the broken sensor is the CTS (coolant temp)? This doesn't look right? Thanks!