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Old 01-08-2015, 08:07 AM
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aklim aklim is offline
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Join Date: Apr 2000
Location: Location: Greenfield WI, USA
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Quote:
Originally Posted by JB3 View Post
89 no scanner, should be obd1.

My 89 chevy the service light turned out to be the egr valve was plugged, but that was a 4.3 throttle body injection. You probably have a similar setup
My 91 is OBD1 too. We can jump the terminal to get the code. With scanner you get more data for diagnosis though. He'd need to find the ALDL which is probably under the driver side dash.
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