Question about 1999 Chevrolet Blazer

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Chevrolet blazer 1999 not commucating with computer

Took the blazer to a machanic but he said he coundnt read computer

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  • Chevrolet Master
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Hi Bigdave, I'm glad to help!

Most of the time when you can't read the computer its because there's no power OR no ground at the DLC connector where they plug their test equipment into. If you have a test light check for power and ground at the DLC Connector. If it doesn't have power then most likely you have a blown fuse. If it doesn't have ground then you'll need to trace where the ground comes from and repair it. NOTE: If you have both power and ground at the DLC connector then there's something wrong with the wiring going to the engine controller OR the controller itself. Hope this helps and have an awesome day Bigdave.

Posted on Jul 16, 2014

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redds55
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SOURCE: how to reset computer for 1999 chevrolet blazer

You can either pull the ECM fuse out then put it back or disconnect the ground cable on the battery for 30 seconds or you can use a scan tool to perform this task.

Posted on Dec 01, 2011

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