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Re: 2003 chevy c5500 engine change problems
Posted to HD/Fleet Forum on 1/29/2012 4 Replies

Hi Mike. First off, on '01-'03 models, the CANdi module wasn't required for communication. '04 models and later do require the CANdi with the Tech 2. If you don't use the CANdi, you may not have communications if all is connected and operable in the engine com... Login to read more.

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