Originally Posted by willwren
Pontiac switched to a 180° thermostat in 1999. Anybody from then on should already have one.
As (I think) I stated earlier, my 2000 Bonneville manual states the thermostat is 195. Unless I have a bad 180 (and I do have experience in this department - t-stats don't like me....
) my Bonnie runs about 200 on the gauge, which would be the big tipoff in favor of me having the 195.
Is it possible that they switched to 180 on the SCd models? BTW, I saw no mention of the 180 t-stat in my manual, and methinks that they make those owners' manuals generic across all model lines - feel free to correct me if I'm wrong....