Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

Electrical issue on 04 2500 I have codes

Thread Tools
 
Search this Thread
 
  #1  
Old 06-24-2015, 03:29 PM
CharlestonFF's Avatar
Diesel Fan
Thread Starter
Join Date: Jan 2012
Location: Charleston SC
Posts: 25
Received 0 Likes on 0 Posts
Default Electrical issue on 04 2500 I have codes

I noticed a few months ago that the steering wheel selector switches were occasionally working and then not working! Now my gauges won't work for a min or two when first starting the truck until I put the truck in drive then the gauges work. Now my service air bag light is on when I take right or left turns... The codes are C0035,U12255,U1003,C0306!
Any ideas would be great!

Thanks'
Adam
 
  #2  
Old 06-24-2015, 05:58 PM
2004LB7's Avatar
Diesel Bomber
Join Date: Dec 2010
Location: Fool's Golden State
Posts: 1,190
Likes: 0
Received 113 Likes on 109 Posts
Default

sounds like a bad ground

check the grounds, especially the one on the frame under the driver door

C0035 = left front wheel speed sensor
 
  #3  
Old 06-24-2015, 08:43 PM
CharlestonFF's Avatar
Diesel Fan
Thread Starter
Join Date: Jan 2012
Location: Charleston SC
Posts: 25
Received 0 Likes on 0 Posts
Default

I will do that first thing in the morning... Do you think all the codes are related to the ground issue... it makes sense that would be the problem on everything! Thanks for your suggestion
 
  #4  
Old 06-24-2015, 10:02 PM
2004LB7's Avatar
Diesel Bomber
Join Date: Dec 2010
Location: Fool's Golden State
Posts: 1,190
Likes: 0
Received 113 Likes on 109 Posts
Default

C0035 = left front wheel speed sensor and C0306 is a 4wd issue. May be unrelated but i would check the grounds as that particular one under the driver side door can cause all sorts of weard problems. The "U" codes are communication errors and are not normally something to worry about.

All your other problems may by from the ground or something else. Tjere is one other connection to check. The two large bale connectors on the top driver side of the engine. Sometimes the pins work there way loose and need to be pulled back out. Disconnect them and inspect the pins. With needle nose pliers pull any "short" pins back out to their full length. I had this happen to me and i had gauge issues, lights staying on, etc. Weird stuff
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Squirt
Diesel In Distress - Support Ticket
0
06-19-2015 12:40 PM
DSM1988
Diesel In Distress - Support Ticket
1
01-25-2015 07:23 PM
Diesel Bombers
General Diesel Related
0
12-29-2014 10:20 AM
RollinDiesel
Diesel In Distress - Support Ticket
1
10-14-2014 03:13 PM
CARP
Ford 83-94 6.9 and 7.3L General
4
10-09-2014 10:47 PM



Quick Reply: Electrical issue on 04 2500 I have codes



All times are GMT -5. The time now is 12:44 AM.