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Old 11-14-2013, 06:12 PM   #1
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PCM code

I have a 2004 Winnebago sightseer 30b with the V10. I'm trying to find the PMC code on it. I was wanting to get a tune from Five Star tuning, but so far I have not found it yet. Looked all around steering column. Can anyone give some help here?
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Old 11-14-2013, 06:15 PM   #2
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Quote:
Originally Posted by BK53 View Post
I have a 2004 Winnebago sightseer 30b with the V10. I'm trying to find the PMC code on it. I was wanting to get a tune from Five Star tuning, but so far I have not found it yet. Looked all around steering column. Can anyone give some help here?
I couldn't find mine either, so Mike at 5 star shipped me a blank tuner. I plugged it in and it showed the codes he needs. I emailed them to him and he emailed the tune file straight back to me. Works even better that way because I now have a backup copy of the tune on my PC.
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Old 11-14-2013, 06:16 PM   #3
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Their web site shows a couple of places it could be.
Under "Where is My PMC Code?"

Got a V10 RV 5 Star Tuning
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Old 11-14-2013, 06:19 PM   #4
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I did talk to Mike and he told me he would do that for me too. I havent even found where to plug it in though. By the way, did it do what you wanted it to do?
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Old 11-15-2013, 05:22 AM   #5
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The PCM is typically a silver metal box, looks like brushed aluminum. It's an inch or so thick, about 6 to 8 inches square. It'll have a sticker on it and the PCM code, typically three letters and a number, are printed on that sticker. Somewhere near the steering column, you'll find the harness the tuner plugs into. It likely as a rubber cover, designed to protect the contacts, and that may make it difficult to recognize. Once you've located the PCM and you get your tuner, while in the coach with tuner in hand, if you look at the end of the harness on the tuner it shouldn't be too long before you recognize the corresponding harness in your coach. It will be in the driver's side dash area, as it's used for all engine diagnostics and needs to be accessible to technicians.

To answer your last question about being worth it: I consider the 5Star tune worth every penny I paid. I absolutely love what it did for my rig. And, Mike was a pleasure to work with.
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Old 11-15-2013, 09:58 AM   #6
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Thanks for the help. I'll look again. I guess it has to be there. It did show on 5 Star tuning website that the box it self may be in engine compartment somewhere. Hard to even see the engine on this Winnebago. Maybe I should lift dog house cover and look under. I've seen them on cars and pickups but never had a class A before or even tried to look under hood of one.
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Old 11-26-2013, 08:26 PM   #7
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I did find it. The box is on left side of steering column tucked up pretty far under dash. The data plug if on right side under the plastic surround that is on the column. You must remove this by taking out 6 screws. Its easy then.
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