Photo: Chevrolet / edited
2021 saw all of GM's full-size utility vehicles get redesigned on the T1XX platform of the fourth-gen Chevrolet Silverado and GMC Sierra. The biggest change over the previous-gen sport utility vehicles comes in the form of independent rear suspension.
Gifted with passive dampers, Magnetic Ride Control, or Adaptive Air Ride, said independent rear suspension is the subject of recall number 23V-642. According to documents filed with the federal watchdog, the supplier of the outer control arm bolts may have messed up during heat treating. Improperly heat-treated bolts weaken over time, resulting in fractures that lead to misalignment of the rear wheels.
Both the bolts in the left and right rear suspension outer camber control arm assemblies are believed to have been incorrectly manufactured by the folks at Acument Global Technologies. Rather than the supplier, a GM plant quality manager informed General Motors of this condition on August 4, 2023.
Working at the Arlington assembly plant in Texas, the GM employee determined that 223 vehicles may have been assembled with improperly heat-treated bolts. Of those, 189 were sold in the United States.
The subsequent investigation determined that control arm separation is possible. On the upside, General Motors isn't aware of any incidents related to said bolts. According to the Detroit-based automaker, truck-based utility vehicles produced after June 27, 2023 were identified and fixed prior to shipment.
Vehicles recalled as part of campaign 23V-642 were assembled in the period from June 19, 2023 to June 27, 2023. Dealers have already been instructed to replace both rear suspension outer control arm bolts with bolts produced outside of the suspect window.
Owners will be informed by first-class mail on or about November 6, 2023 with instructions to bring their SUVs in for the remedy. Affected vehicles include 9 examples of the Cadillac Escalade and 9 of the roomier Escalade ESV, 74 units of the Chevrolet Tahoe and 39 of Suburban, plus 31 units of the GMC Yukon and 27 of the long-wheelbase Yukon XL.
Save for the Caddy, the other two marques offer three powerplants in their body-on-frame SUVs. The list begins with a 3.0-liter I6 turbo diesel marketed under the Duramax handle, which puts out 277 horsepower and a respectable 460 pound-feet (624 Nm). This peak torque estimate matches that of the 6.2-liter V8, a direct-injected small block with 420 ponies on tap. The 5.3er, on the other hand, makes 355 horsepower and 383 pound-feet (nearly 620 Nm) of twist.
The Escalade is available with either the 3.0 or 6.2, but there is a slight twist. If you're prepared to pony up top dollar for the Escalade-V, the crown jewel of General Motors will upgrade the 6.2-liter small block with a supercharger. In this application, the LT4 engine belts out 682 horsepower and 653 pound-feet (885 Nm) of tire-shredding torque at full chatter.
Regardless of engine, GM sweetens the deal with the Hydra-Matic 10L automatic that's known as the 10R in Ford vernacular. Said transmission was designed primarily by Ford as part of a partnership with GM that also gave us the GM-developed 9T series for transverse applications. The 9TXX is widely considered a much worse tranny than the 10-speed unit for longitudinal applications.
Both the bolts in the left and right rear suspension outer camber control arm assemblies are believed to have been incorrectly manufactured by the folks at Acument Global Technologies. Rather than the supplier, a GM plant quality manager informed General Motors of this condition on August 4, 2023.
Working at the Arlington assembly plant in Texas, the GM employee determined that 223 vehicles may have been assembled with improperly heat-treated bolts. Of those, 189 were sold in the United States.
The subsequent investigation determined that control arm separation is possible. On the upside, General Motors isn't aware of any incidents related to said bolts. According to the Detroit-based automaker, truck-based utility vehicles produced after June 27, 2023 were identified and fixed prior to shipment.
Vehicles recalled as part of campaign 23V-642 were assembled in the period from June 19, 2023 to June 27, 2023. Dealers have already been instructed to replace both rear suspension outer control arm bolts with bolts produced outside of the suspect window.
Owners will be informed by first-class mail on or about November 6, 2023 with instructions to bring their SUVs in for the remedy. Affected vehicles include 9 examples of the Cadillac Escalade and 9 of the roomier Escalade ESV, 74 units of the Chevrolet Tahoe and 39 of Suburban, plus 31 units of the GMC Yukon and 27 of the long-wheelbase Yukon XL.
Save for the Caddy, the other two marques offer three powerplants in their body-on-frame SUVs. The list begins with a 3.0-liter I6 turbo diesel marketed under the Duramax handle, which puts out 277 horsepower and a respectable 460 pound-feet (624 Nm). This peak torque estimate matches that of the 6.2-liter V8, a direct-injected small block with 420 ponies on tap. The 5.3er, on the other hand, makes 355 horsepower and 383 pound-feet (nearly 620 Nm) of twist.
The Escalade is available with either the 3.0 or 6.2, but there is a slight twist. If you're prepared to pony up top dollar for the Escalade-V, the crown jewel of General Motors will upgrade the 6.2-liter small block with a supercharger. In this application, the LT4 engine belts out 682 horsepower and 653 pound-feet (885 Nm) of tire-shredding torque at full chatter.
Regardless of engine, GM sweetens the deal with the Hydra-Matic 10L automatic that's known as the 10R in Ford vernacular. Said transmission was designed primarily by Ford as part of a partnership with GM that also gave us the GM-developed 9T series for transverse applications. The 9TXX is widely considered a much worse tranny than the 10-speed unit for longitudinal applications.
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