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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, ... JOIN NOW TO REMOVE TRACER

code p1781 2001 2500 HD Silverado, Duramax, Allison

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  #1  
Old 11-05-2010, 09:08 AM
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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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  #2  
Old 11-05-2010, 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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98 12V quad cab 4X4 AND 2001 24V quad cab 4X4


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Old 11-05-2010, 11:02 AM
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chad83181's Sig:[/SIGPIC] SOLD 2001 LARAMIE SLT 2500 4X4, BHAF, 4" DOWNPIPE/EXHAUST, SILENCER RING MIA, SKYJACKER SHOCKS,FASS HPFP 95.SMARTY SENT TO BETTER HOME FOR A EDGE JUICE WITH ATTITUDE THANKS TO RAWilliams and a set of 150 BIG DAWG INJECTORS THANKS TO LUKE @ DIESEL DAWGS PERFORMANCEAND A FEW TRANNY GOODIES SOON WITH A TURBO
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Old 11-05-2010, 11:56 AM
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Howdy! Welcome to Diesel Bombers! You're Going to Like it Here!

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Old 11-06-2010, 03:45 AM
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97cummins's Sig:htt 3 piece exhaust manifold, banks twin ram air intake
turbo silencer ring mia/ Zombie soldier cold air intake
3000 rpm governor spring kit, #10 fuel plate
3 gauge pod setup, 4'' exhaust turbo back,into duels
Star wheel all the way forward, tranny 3/4 swith/and lockup switch
Dunrite tripple disc torque convertor, Heavy duty valve body
16 degrees timing, arp head studs, trans. Cooler,
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Old 11-07-2010, 05:04 PM
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welcome

crewcab59's Sig:1984 gmc crewcab s/b 6"lift with 92 cummins all on 37's gauges,intercooler,pump maxed, m&h#2, timing 1/8,timing spacer, 3200 spring,LBD 5x14's,walbro fuel pump,getrag,big air intake/4"exhaust/stacks, htt s300g 62/65/14, 60lb v/s and head studs
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Old 11-08-2010, 06:38 AM
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Welcome to db

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06 3500 MEGA cab auto srw 4x4.
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Old 11-10-2010, 10:47 AM
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Enjoy the site..

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