Go Back   Truck Forums > Chevrolet/GMC Truck Forums > Chevy Silverado/ GMC Sierra Forum
Sign in using an external account
Register Forgot Password?
Search

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-16-2010, 01:08 PM
Junior Member
 
Join Date: Jan 2010
Posts: 2
Default Error Code P3400

My father in-laws truck is a 2007 GMC sierria and on thier way to our house his check engine light came on. We took it to Autozone and they read it. It showed a P3400 error, but they couldnt tell us what that error was in a GMC. They reset the code and it hasnt come back on yet, but we have only driven it a few miles so far.

Can anyone tell me what that code is?

Thanks,
Eric
This ad is not displayed to registered members.
Register your free account today and become a member on Truckforums!
Reply With Quote
  #2  
Old 01-16-2010, 03:19 PM
RUFFNECK4LYFE's Avatar
Toyota, Nissan, and Other Truck Forum Moderator
 
Join Date: May 2009
Location: West Texas
Posts: 1,845
Default

I think thats for cylinder deactivation. Get on the highway and cruise until the motor shuts down 4 cylinders. If it comes back on then it needs to be serviced by the dealer.
__________________
That way you'll Learn!!!!
Reply With Quote
  #3  
Old 01-17-2010, 01:34 PM
Junior Member
 
Join Date: Jan 2010
Posts: 2
Default

Sounds about right. They were crusing down the highway when it came on the first time. Thanks for the info!
Reply With Quote
Old 01-17-2010, 01:34 PM
 
 
 
Reply



Tags
2010, avalanche, chevy, code, diagnostic, dodge, dodgeramcodep3400, engine, error, ford, honda, obd2, p3400, silverado, trouble, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising

Featured Sponsors
Vendor Directory

Our Sponsors
Advertising
All times are GMT -5. The time now is 05:06 PM.

Internet Brands, Inc.



SEO by vBSEO ©2010, Crawlability, Inc.