check abs, trac off can be turned off by computer service engine light can come on for both them items. check for air in ABS system, look for bleeder on ABS valve body
Try looking at the fuel filter, it might be partly clogged or just clogged.Locate the fuel filter, disconnect it and (I know this sounds strange) blow through it, if you get resistance of any kind, then it's bad, if it blows completely through with NO resistance at all, then it's good.
Having a factory or professional type scan tool hooked up checking DTC'S - diagnostic trouble codes in all the modules on the vehicle . Insturment cluster , PCM , BCM ,ABS , SRS etc.... Should be the first step in the diagnostic procedure.. Could have a serial data network problem . Do you know what a serial data buss is ? In the case of your vehicle it is GM class 2 data buss . Anytime a bunch of thing's electrical wierd out , suspect the buss.Buick , chevy , cadillac , olds , pontiac all used this .
Buick Class 2 Operation Diagnosis 1998
yes its replacable, they just tell you it isnt so you buy the new 200$ guage. There was actually a recall on the cavi's for this problem. You can unsolder the old bulb and solder a new one in
on the end of the splines in a groove of the shaft there should be a round "c" clip ( like a round piece of spring wire ) that is used to retain the shaft in the diff
it compresses into the groove when removing or installing
make sure that the shaft is the correct length for that side and get the clip from a drive shaft shop / service center
Could be the light switch is bad , but that would be just guessing ? And you don't want to replace parts form a guess posted on here !
The way to find the problem is with electrical testing , using a volt meter , wiring diagrams an leaning how to do automotive electrical testing , how to read an use wiring diagrams etc.. Testing B+ voltage to the headlamps an the ground circuit using voltage drop testing . That is if you want it fixed right .
Electric Testing Techniques You Need to KnowElec Lesson 6 AC Diag 1How to read an electrical diagram Lesson 1
Find a wiring diagram at http://www.bbbind.com/free_tsb.html free wiring diagrams . Enter vehicle info. year , make , model , engine size . under system click on lighting then under subsystem click headlamps . Buy a volt meter an test the circuits .
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
I would check a sensor called the mass air flow sensor its located in the intake stream before the air gets to the intake air temperature .
Its baslcly the first sensor the computer use's to control the vehicle .
It is expensive how ever some times it can be cleaned you can by mass air flow sensor cleaner for about 10 bucks dosn't always work but if it is bad t5heir is a huge recore for it like 80 ti 100 dollars so don't through it away.
