Leak above front differential

[Malik112099]

2007 Yukon XL Denali 6.2L

I noticed some fluid on the ground in the garage where I park. Looked under my truck and noticed fluid all over the front cross member. I put it on ramps and cleaned everything up with few rags and then noticed some fluid leaking from above the front diff. Very hard to tell where it is coming from from below or above. These are the best pics I could snap at the time while trying to get the light right. Any opinions? My fear/thought is the rear main seal but I don't know if that would be the area to see fluid if it was leaking..I also wondered about the differential leaking itself. Not sure. Any input would be appreciated. I am thinking about dropping it off Friday morning at my mechanic and paying the diagnostic fee.

Side note: I sent these pics to my mechanic and they said it could be a coolant leak.....

 

[89Suburban]

It does look "watery" to me. May be coolant?

 

[petethepug]

Keep those Ideas coming. My 08 Denali 6.2 is in the shop to find my mystery coolant leak b4 Friday when the service contract ends. I’m losing about 1/2 jug of coolant every 3 mo. No coolant on ground (yet).


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[SnowDrifter]

Oil cooler lines?

Have a mirror or smart phone at your disposal?

 

[Derick]

Did you do the taste test? That'll tell you everything.

 

[ivin74]

I"m with Chris, the oil cooler lines. Inspect them and keep us posted

 

[petethepug]

Tech found my coolant leak, both end tanks on oem dealer replacement radiator w/ a lifetime warranty failed after 3.75 years.

Cool! Caught it 2 days before service contract terminated.


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[thompsoj22]

check the engine mount, my front diff has some residual stains from what i believe to be an engine mount that ruptured and leaked the fluid onto the diff. the mount looks new so i know it was replaced by the previous owner.

 

[89Suburban]

Tech found my coolant leak, both end tanks on oem dealer replacement radiator w/ a lifetime warranty failed after 3.75 years.

Cool! Caught it 2 days before service contract terminated.


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Thanks for letting us know.

 

[Malik112099]

Oil pan gasket is leaking pretty good. They said my axle seals are bad as well. $1200 total to fix it all. I told them to go ahead and do it.