Recall 10V158 covers 521 2010-2011 Workhorse W22, W62, and W42 trucks for an alternator short. Repair is free at any franchised Workhorse dealer.
Workhorse is recalling 521 2010-2011 W22, W62, and W42 trucks built with a General Motors gasoline engine and a Remy alternator. A low-resistance short in the alternator's voltage regulator can happen without warning and result in a vehicle fire; the Workhorse dealer repair will be free once available.
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What's wrong?
The alternator on the 2010-2011 Workhorse W22, W62, and W42 trucks is the engine-driven generator that keeps the battery charged. On these trucks, the concern is inside the Remy alternator used with the General Motors gasoline engine. The voltage regulator is the control part inside the alternator. It keeps electrical output within the range the truck's electrical system is designed to handle.
The defect is a low-resistance electrical short in that voltage regulator. A short means electrical current takes an unintended path through the part. Because the short has low resistance, current flows where it should not, and the regulator no longer controls alternator output the way it was built to.
There is no warning sign before failure. An owner should not count on a dashboard light, noise, smell, or change in driving feel before the alternator regulator shorts.
Who's affected?
Spans the W22, W62, and W42 across the 2010 and 2011 model years, all tied to the same electrical system component.
| 2011 Workhorse W22 | electrical system |
|---|---|
| 2010 Workhorse W62 | electrical system |
| 2010 Workhorse W42 | electrical system |
| Units affected | 521 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific vehicle is included.
What's the safety risk?
An electrical short in the alternator can happen without warning and can result in a vehicle fire. Because there is no warning sign before the short, schedule the dealer inspection soon and avoid delaying the repair path. Repair will be free at any franchised Workhorse dealer once available.
What should I do?
- Check your VIN to confirm your 2010-2011 Workhorse W22, W62, or W42 is included in this recall.
- Review your Workhorse owner letter, mailed on June 2, 2010, for repair instructions.
- Contact a franchised Workhorse dealer to ask about the free alternator inspection and replacement that fixes the electrical short risk.
- Reference recall number 10V158 when you call the dealer or Workhorse customer service.
- Park outside and away from structures until the alternator has been inspected and repaired.
What happens at the repair
The remedy is an alternator inspection. At the dealer, a Workhorse technician checks the alternator and replaces it if the inspection shows replacement is needed. The remedy notice says this work is free of charge and that the recall began on June 2, 2010. Because the current remedy status is not listed in the input, confirm appointment timing with a Workhorse dealer before bringing the truck in.
Timeline
| April 16, 2010 | NHTSA published the recall |
|---|---|
| June 2, 2010 | Owner notification mailed |
Frequently asked questions
What is recall 10V158?
Recall 10V158 covers 521 2010-2011 Workhorse W22, W62, and W42 trucks built with a General Motors gasoline engine and a Remy alternator. The alternator voltage regulator can develop a low-resistance electrical short, creating a vehicle fire risk.
What should I do if my 2010-2011 Workhorse W22, W62, or W42 is on this recall?
Check your VIN to confirm your specific truck is included in recall 10V158. If it is, contact a franchised Workhorse dealer to schedule the alternator inspection. The dealer will replace the alternator if needed, and the recall repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Workhorse dealers will inspect the alternator and replace it if needed free of charge under recall 10V158.
What is the safety risk in recall 10V158?
The safety risk is a vehicle fire. Per NHTSA campaign 10V158, a low-resistance electrical short can develop in the alternator voltage regulator without warning. The dealer repair addresses that risk by inspecting the alternator and replacing it if needed.
What warning signs should I watch for?
There is no warning sign before the alternator short described in recall 10V158. Check your VIN first. If your truck is included, schedule the free dealer inspection instead of waiting for a dashboard light, smell, sound, or charging-system symptom.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/10V158000 |
|---|---|
| Workhorse customer service | 1-877-246-7731 |
| NHTSA recall # | 10V158 |
| NHTSA recall # (full) | 10V158000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Defect / Noncompliance Notice (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 3, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →