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Chevrolet 5500HD Rear Axle Bolts May Loosen

NHTSA campaign 21V194000 · Reported Mar 19, 2021 · Isuzu Technical Center of America, Inc.

high How serious is it? About this label

A stall caused by this problem increases the risk of a crash. The notice does not tell owners to stop driving.

Key facts

NHTSA campaign number	21V194000
Reported to NHTSA	Mar 19, 2021
Manufacturer	Isuzu Technical Center of America, Inc.
Part affected	Suspension:rear:springs:leaf Spring Assembly:u-Bolt, Leaf Spring TO Axle
Vehicles covered	1 model/year combination, model years 2019
Do-not-drive advisory	No
Park-outside advisory	No
Repair	Free at any franchised dealer

What's wrong, in plain English

The nuts on the rear axle's U-bolts may not have been tightened properly during assembly. Over time, they can loosen, allowing the axle to shift out of alignment. If this happens, the driveshaft that sends power to the rear wheels can separate, causing a sudden loss of power and a stall while driving.

What you should do

1. Check your VIN at nhtsa.gov/recalls to see if your vehicle is affected.
2. Contact your dealer or Isuzu customer service at 1-866-441-9638 to schedule a free inspection.
3. Dealers will replace and tighten the rear axle U-bolt nuts, free of charge.

Where do I find my VIN, and what do I tell the dealer?

Your VIN is the 17-character code on the lower left of the windshield, on your registration and usually on your insurance card. Enter it at nhtsa.gov/recalls to see whether this recall is still open on your car. When you call the dealer, say you have an open safety recall and give them NHTSA campaign number 21V194000. More in how recalls work.

Affected vehicles (1)

2019 Chevrolet 5500HD

Who to contact

Chevrolet — official Chevrolet recall lookup

Customer service: 1-800-222-1020

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

The bigger picture

Chevrolet Suspension Recalls Involve Control Arms and Axle Fasteners · all 5 Chevrolet recalls in this area

Other Chevrolet 5500HD recalls

Apr 13, 2023Chevrolet Medium-Duty Trucks Brake Sensor Fire Riskcritical
Nov 23, 2022Chevrolet Heavy-Duty Trucks Steering Lock Nuts May Breakhigh
May 29, 2020Chevrolet Medium-Duty Trucks ABS Warning Light Failurehigh
Nov 20, 2019Chevrolet/Isuzu Trucks: Rear Wheel Lug Nuts Loosehigh

Official notice

Component: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE
Summary: 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.
Safety 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.
Remedy: 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.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.