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Re: GM Programming Error Code E4491
Posted to Technical Discussion Forum on 11/14/2015 2 Replies

Jasper, have you tried Tech2 remote feature. Sometimes this makes a difference. Also, do you have an MDI or Jbox to try and program the pcm?

Now, with all this being said. I have seen and experienced some after market tuners which have been installed and the... Login to read more.

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