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2500HD/3500 HD Trucks & Drivetrain Discussion Forum for the 2001 & newer 2500HD/3500 Trucks, Transmissions & Drivetrain

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Old 04-28-2017, 07:24 PM
Tractorhauler Tractorhauler is offline
Join Date: Aug 2001
Location: Scottsbluff, NE. USA
Posts: 204
Default Check engine light 2015 Duramax Allison. Towing 15K

I was just in the last mile of a 111 mile gooseneck tow. Heading home after a turn D.C. Highway. The Allison lurched into a lower gear and she went into limp mode. Check eng light came on. She is running well unhooked from trailer now. Going to get codes in morning. No high temps at all were happening
What codes should I look for. Can they be reset.

Talk to y'all in AM

2007.5 GMC SLE 2500 HD LMM **SOLD**
Owned 2006 GMC Sierra CC LLY/LBZ *2 not a D in SN* 214K Purchased 3/2010
CC/SB/4x4 Summit White
Owned a 2002 GMC CC LB7 CC sold with 135K
Now 2015 GMC Crew Cab Duramax/Allison
Custom Tool box
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Old 05-25-2017, 09:24 PM
gary_lucas's Avatar
gary_lucas gary_lucas is offline
Join Date: May 2012
Location: Langley
Posts: 372

Any info on this? I've had something similiar, but cleared the code and it never re-appeared. I wrote it down somewhere... About 3 years ago...
GMC Sierra 2500hd 2004.5 now with ARP studs
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