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code p1781 2001 2500 HD Silverado, Duramax, Allison

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Old Nov 5, 2010 | 09:08 AM
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mcanfield's Avatar
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From: Hardin, KY
Default code p1781 2001 2500 HD Silverado, Duramax, Allison
First time posting, hope someone can help me.
My service engine light came on, went to Autozone for their free check.
P1781 is the code, poor or lost communication with TCM ( transmission control module ?? )
Any suggestions?
Thanks in advance for any help, I hate to take it to the dealer.
 
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Old Nov 5, 2010 | 10:09 AM
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Welcome.

Please take a minute to find the correct forum and post your questions there.
 
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Old Nov 5, 2010 | 11:02 AM
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Old Nov 5, 2010 | 11:56 AM
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Howdy! Welcome to Diesel Bombers! You're Going to Like it Here!
 
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Old Nov 6, 2010 | 03:45 AM
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Old Nov 7, 2010 | 05:04 PM
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welcome
 
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Old Nov 8, 2010 | 06:38 AM
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Welcome to db
 
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Old Nov 10, 2010 | 10:47 AM
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Enjoy the site..
 
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