In the coolant reservoir? That means your transmission cooler that is part of the radiator failed and transmission fluid is mixing with the coolant. The fix is to not drive it anymore and flush the transmission fluid ASAP. If you are doing it yourself, drain and fill the transmission at least 3 times. Then flush the coolant system, and replace the radiator. In some cases, the transmission is never the same as the water swells the transmission clutch plates, requiring a rebuild.
how to fix yukon tail light
2015 GMC Yukon Denali
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Maintenance & Repair
Water is pink milky
2007 GMC Yukon 4WD
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Maintenance & Repair
I Have A 07’ Yukon SLT. And I been Having battery drainage problems lately.. it will be working Fine than one minute I while get back in it to drive and it will be Dead! Get a jump, it comes back o...
2007 GMC Yukon SLT1 4WD
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Maintenance & Repair
Ok i got cylinder #7 misfiring. She has 334,000 miles and is still running good but I hate when it starts misfiring. Anybody with any good tips for the yukon even if they have nothing to do with ...
2001 GMC Yukon SLT 4WD
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Maintenance & Repair
i need to know what the cause might be so i can fix it
2007 GMC Yukon Denali AWD
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Maintenance & Repair
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