2005 Bonneville SLE
I have a 2005 Bonneville SLE-with 39K miles I have replaced the heater fan blower motor twice-also the temperature gauage is irratic-has anyone else had theae problems
try changing temp control censor.
Agreed, coolant temp sensor may cause your temp gauge to be erratic...However, the heater fan blower motor sounds like either a bad part (did you get it from the dealer) or stray voltage/excess voltage is killing it. This will require some diagnosis.
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