It’s possible that some units of the 2022 GMC Yukon may show signs of a fluid leak around the rear of the transmission. Now, a potential cause for this condition has been identified, as well as what GM technicians will to do to fix the issue.
Per a recent report from GM Tech Link, customers who own a 2022 GMC Yukon may notice that the SUV is leaking around one of more of the transmission’s rear case plugs. For those readers who may be unaware, all units of the 2022 GMC Yukon are equipped with the GM Hydra-Matic 10L80 10-speed automatic transmission, regardless of the engine selection.
To fix the leak, GM is instructing technicians to first inspect the transmission and case plugs to identify where the leak is coming from. If either of the transmission plugs are in fact leaking, the technician should then remove the transmission crossmember support and mount in order to gain better access to affected components.
With the crossmember support and mount out of the way, technicians will then remove and discard the leaking transmission case plug or plugs. Any residual oil should then be cleared from the threaded hole, although GM states that not all residual oil may be removed using a shop towel, and as such, brake clean-type solvents should not be used.
Once the hole has been cleared, technicians should next install a new plug or plugs, applying some ACDelco thread sealant prior installation. New plugs should be torqued to 11 pound-feet. With the new plug or plugs installed, the area should be cleaned one final time, and the transmission crossmember should be reinstalled. Finally, the transmission fluid should be topped off using fluid ULV if it’s low.
As GM Authority covered previously, a similar issue and fix were also identified for the 2022 Chevy Tahoe and 2022 Chevy Suburban, as well as the 2022 Cadillac Escalade. All three models are equipped with the same 10-speed automatic transmission.
As for the 2022 GMC Yukon, engine options include the naturally aspirated 5.3L V8 L84, the naturally aspirated 6.2L V8 L87, and the 3.0L I6 LM2 turbodiesel Duramax. Under the body panels, the SUV rides on the GM T1 platform, with production taking place at the GM Arlington plant in Texas.