GMC Repair: 2000 Lesabre false electrical alert, vacuum line, warning lights

Question
Different warning lights will come on and then go off.  They may flash for 3 seconds and then mysteriously go off.  I get a security lights for problems with: air bag, the cluster of warning lights will get very bright and then return to normal, the radio will go off for a second or two, when put in park, it may not unlock the doors, etc.  Can you help us figure this out?

Answer
What mechanical work or ANY kind of work has been performed on the vehicle recently ?. As most problems that occur after a recent repair was made can be traced back to the area of where the repair was made as a vacuum line may have been knocked loose or a wire connection came loose, Look around in the area where work was performed.

Your problem sounds exactly like someone who has worked on the vehicle has forgotten to reattach a GROUND wire.


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