Question about 2001 GMC Sierra 1500HD
I would change the map sensor and the throttle position sensor and check the wiring while you're at it.
I know it can be frustrating, but try that first.
Posted on Jul 08, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
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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.
we need the trouble codes to help you, please.
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