Madhorn
Full Access Member
- Joined
- Jan 16, 2017
- Posts
- 623
- Reaction score
- 1,336
- Location
- AR-Arkansas
- First Name
- Ken
- Truck Year
- 1977
- Truck Model
- K10
- Engine Size
- 5.3/NV4500/NP205/4:56 gear/35in tires
Ok. The factory 1977 coolant temp sensor for gauges reads 623 ohms setting on my work bench. 40 degrees outside today. The 3 pin 1998 camaro sensor reads 2.6k ohms. Hmmm. Just for fun I went to Autozone and had them pull coolant sensor for an 80 C10 and it was not only a different sensor than the 77 it read higher resistance similar to the 98 sensor. So it seems sometime around 80 the resistance values in the coolant sensors changed.