DRL's stopped working....2007.5 GMC 2500 Duramax NBS

[dutchpilot]

I have a 2007.5 GMC 2500 Duramax NBS......daytime running lights for some reason has stopped working.

 

Truck has just over 400,000 miles on it....also a CDN truck.

 

Replaced the sensor.....checked emergency brake switch, it's OK.....checking both fuses under hood, they are OK

 

Looking at the gmupfitter site , I see that there is a DRL relay, but it is part of a PCB board, but can't find the location of this relay.....or it could be possibly a BCM problem.

 

Any help would be a appreciated, I'm a hot shotter and need the the truck, don't really want to take it to a dealer yet.

 

In the mean time I will run the fog lights as my DRL while driving in Canada.

 

Thankyou

[txab]

nvm...

[dutchpilot]

Txab......thanks for the reply, appreciate the response, but don't think that schematic is from a 2007.5 NBS and up.......now I could be wrong, but I see something a little different on gmupfitter.

 

Also the DRL's on the truck run through the low beams headlights on the newer style trucks, and my low beams are working fine.

 

Also your schematic shows a DRL relay in the fuse block, the newer trucks have no DRL relay in the fuse block.

 

Now in this gmupfitter page page B-11 it states this...http://www.gmupfitter.com/publicat/2008_BB/08REV_LDCKFST_Elec_D3.pdf

 

 

 

Note: Relays listed below are non-serviceable Printed Circuit Board (PCB)

relays and are internal to the block

 

Hopefully there is an easy fix for this.....

[txab]

Yeah, you're right. The diagram I posted was apparently earlier than '08 even though the page stated 2008 model