2017–2020 Chevrolet 4500HD, 2017–2020 Chevrolet 4500XD, 2017–2020 Chevrolet 5500HD and 9 other models Recall: U-bolt nuts for the rear axle may not have been properly tightened and may…
NHTSA campaign 21V194000 · Suspension · filed Mar 19, 2021 · verified Jul 30, 2026
The defect
Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2015-2017 Isuzu NPR, Reach, 2016-2020 Isuzu NPR XD, NPR HD, NQR, 2016-2021 Isuzu NRR, 2017-2020 Chevrolet 4500XD, 4500HD, 5500HD, and 2020 Chevrolet 5500XD vehicles. The U-bolt nuts for the rear axle may not have been properly tightened and may loosen, causing the axle to misalign.
The risk
The misalignment may cause the propeller shaft to separate, causing a loss of power to the rear wheels and a stall, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Isuzu will notify owners, and dealers will inspect and, if needed, replace and tighten the rear axle U-bolt nuts, free of charge. The recall began on April 23, 2021. Owners may contact Isuzu customer service at 1-866-441-9638. Isuzu's number for this recall is V2103.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Affected vehicles
Related recalls
More Chevrolet 4500HD recalls
- 2019–2023 Chevrolet 4500HD and 2 other models — Brake pressure sensor assembly may leak brake fluid into…
- 2021–2022 Chevrolet 4500HD and 4 other models — Hex flange lock nuts used in the suspension and steering…
- 2022 Chevrolet 4500HD and 2 other models — Pressure-sensor fitting of the primary hydraulic brake line…
- 2019–2020 Chevrolet 4500HD and 8 other models — Due to a manufacturing issue, the seat belt webbing locking…
- 2019–2020 Chevrolet 4500HD and 7 other models — Lug nuts on the rear outer wheels may not have been…
Other campaigns involving Chevrolet vehicles
- 2025–2026 Chevrolet Express and 1 other model — Steering gear assembly may have a nut that was not properly…
- 2026 Chevrolet Express and 1 other model — Gear shifter may provide inaccurate gear selection feedback…
- 2018 Chevrolet Silverado 1500 and 5 other models — Left-side or right-side roof rail air bag (RRAB) inflator…
Source: NHTSA recall database, campaign 21V194000 (manufacturer number V2103). Data last verified Jul 30, 2026.