My girlfriend's family has a Buick LeSabre. Vehicle starts up, system
checks okay (various lights in cluster, such as service engine - ABS -
traction - etc. shut off as they are supposed to shortly after car is
running). However, I rode with him for about 5 miles and the ABS system
turned off, the traction control turned off, and the service engine
light came on. These three lights came on simultaneoisly in the
instrument cluster, combined with the annoying 'beep' you hear when a
door is open and your headlights were left on. The car still drives and
functions as normal (aside from braking and traction), except for that
the blower fan for the climate control shuts off or changes speeds <---
??? I looked on edmunds.com reviews, and there were many instances of
this problem tolerated by other drivers, but no 'cure'. Suggestions?
Note: Car has been in 'shop' various times - some sensors have been
replaced. Problem is intermittent and resumes back to normal operation
at random intervals.