Question about 2003 Oldsmobile Bravada
The problems/warning indicators u have are most likely not related and likely are all separate issues, they are each related to sensor failures and other issues such as defective wiring, each one of these problems that has turned on a light in the dash will set a fault code in the memory of the following control modules, the Body control module (BCM) and the Powertrain control module (PCM) and the Airbag diagnostic monitor, as far as the speedometer goes that may just be a defective speed sensor, the airbag light can be one of about a dozen components with a failure, the Service engine soon (SES) light can be turned on by a loose or leaking gas cap and about 200 other electronic problems within the system, each has it own distinct fault code, the poss defective parts are just to numerous and expensive to guess on, you could spend a $1000 on parts and not fix the problem, so what do u do here? u go to any GM dealer, they have very sophisticated diagnostic scanner that can read and test the system i mentioned for fault codes, then isolate the separate problems causing the warning light to come on, u don't have a shorted dash. I have been a mater tech in automotive electronic systems diagnosis and repair for 30+ years, whish i had a quicl answer for you, but there is none, just to many poss problem area's here.
Posted on Dec 10, 2009
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Posted on Jan 02, 2017
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Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
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