All Bonneville through 99 should have no issues at all with a 180 T-Stat..
The 00+ does have a code for not meeting a certain temp range.. But I'd like to see a service manual on the 00+ to see if that temp is actually 176...
Now on my older Bonneville I'll bet I could get away with a 160, but barely... So I run and am happy with the 180'*..
And I agree... I can't remember the last time anyone had an issue with a 180F T-stat
Same goes for all of the GP guys and Gals as well
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