This is mechanical, but not Bonneville. It is G.M. related though.
1992 Chev Silverado 1500 PU
At exactly 60 kph the brake warning lights and ebrake light come on. (on the dash)
Ebrake switch, brake light switch and master cylinder low fluid warning system all check out OK.
Cruise control don't work. Could the two be related? Is there a CC modual that could be causing the problem?
I know I could join yet another forum to ask this question, but I'm here, I'm bored, and you guys and gals are so darn helpful.
So, any ideas?