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Old 02-16-2011, 05:53 PM   eBay Motors  #1 (permalink)
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CEL:U0100 and P0700??

My truck seems to be stuck in Tow/Haul (even though I never engaged it and the T/H light is not on) and I got a CEL with the following codes:

U0100 Lost Comm With ECM/PCM A
P0700 Tran Ctrl Sys Error

Anybody have any idea what caused this and how to fix it?
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Old 02-17-2011, 05:46 AM   eBay Motors  #2 (permalink)
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Bump
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2006 Chevy 2500 LBZ 4x4 CCSB
4"TB, K&N, Nicktane/CAT, airbags, B&W, Bilsteins

None are more hopelessly enslaved than those who falsely believe they are free. --Johann Wolfgang von Goethe
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Old 04-09-2011, 07:01 PM   eBay Motors  #3 (permalink)
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Ever figure out what caused this?
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Old 04-10-2011, 11:48 AM   eBay Motors  #4 (permalink)
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No. The CEL went away (after a few days) as mysteriously as it appeared, and I haven't had any problems since. Another member had the same experience. Apparently the TCM just glitched.
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2006 Chevy 2500 LBZ 4x4 CCSB
4"TB, K&N, Nicktane/CAT, airbags, B&W, Bilsteins

None are more hopelessly enslaved than those who falsely believe they are free. --Johann Wolfgang von Goethe
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