Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Where is the Zone 5 Engine Ground on a 2007.5 Sierra Denali?


Recommended Posts

I do not see an L92 specific location in the Electrical Manual.  Does anyone know where it is located?  

 

Also does anyone know where and what the SA550 ground is?

 

image.thumb.png.12f2faee4abc496d4d467bbb93b0e21b.png

 

I am trying to fix a weak ground to the RUN / CRANK fuse.  SA550 is notated in this diagram.  Not sure what it is.   

 

image.thumb.png.cb36e407439063833a08b9f86333c61e.png

 

Thanks for your advice.

 

 

Link to comment
Share on other sites

The one zone 5 in the first picture is the ground on the back of the drivers side cylinder head. There is usually always one there.

 

And I think there is a ground that runs from the cross member under the engine to the engine block itself as well.

Edited by CamGTP
Link to comment
Share on other sites

On 3/17/2023 at 10:02 PM, BruceW said:

I do not see an L92 specific location in the Electrical Manual.  Does anyone know where it is located?  

 

Also does anyone know where and what the SA550 ground is?

 

I am trying to fix a weak ground to the RUN / CRANK fuse.  SA550 is notated in this diagram.  Not sure what it is.   

 

Thanks for your advice.

 

 

 

 

Are you talking about the RUN/CRANK relay and not fuse?  There is no run/crank fuse.  Run/crank relay circuits follow out to ground G102.  G102 is located on the driver's side of the engine block, just under cylinder # 1 below the exhaust manifold (driver's side front cylinder).  

 

TBH, I wouldn't be surprised if you are looking at a bad underhood fuse block and the RUN/CRANK bus internally is corroded or shorted out.  UBECs are VERY common on 07-13 trucks.  

 

Edited by newdude
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.