The GMC Yukon was completely overhauled for the 2021 model year, introducing a wide variety of changes and updates as the SUV nameplate’s all-new fifth generation. Notably, some fifth-generation GMC Yukon owners may notice that their SUV emits a peculiar pop or clunk sound when turning. Now, a possible cause behind this issue has been identified, as has a fix.
Per a recent report from GM TechLink, this issue manifests as a click, pop, clunk, or thump noise from underneath some units of the 2021 through 2023 GMC Yukon. The problem can reportedly be duplicated by performing a full left turn followed by a full right turn at slow speeds in an open parking lot. The sound may appear as though it is coming from the front of the vehicle, but in fact could be a loose rear sway bar link upper mounting instead.
To address this issue, a GM technician should inspect the rear sway bar link upper mounting bolt and nut to ensure that they are properly torqued. If the rear sway bar link upper mounting bolt and nut are not properly torqued, the technician should torque the components to 74 pound-feet. With the components properly torqued, the related sounds should stop.
Notably, the GMC Yukon introduced a new independent rear suspension in conjunction with the 2021 model-year overhaul. Both the 2021 Chevy Tahoe and 2021 Chevy Suburban also received generational overhauls, as well as a new independent rear suspension, and all three vehicles may exhibit a similar pop or clunk sound as a result of an improperly torqued rear sway bar link upper mounting bolt and nut. All three models ride on the GM T1 platform.
As a reminder, the fifth-generation GMC Yukon offers three powerplants, including the naturally aspirated 5.3L V8 L84 gasoline engine, the naturally aspirated 6.2L V8 L87 gasoline engine, and the 3.0L I6 LM2 turbodiesel Duramax engine. Each connects to the GM 10-speed automatic transmission. Production takes place at the GM Arlington plant in Texas.