Recall 10V636 covers 2,992 2006-2007 W3500, W4500, W5500, Npr, Nqr, and Nrr vehicles for loose oil-pipe bolts. Repair is free at a franchised GMC dealer.
GMC is recalling 2,992 2006-2007 W5500, W3500, Nrr, W4500, Nqr, and Npr vehicles because oil pipe bolts were not tightened properly during production. Loose bolts can let oil leak, and oil loss can cause engine seizure while driving, leading to sudden deceleration and increased crash risk; the dealer repair will be free once available.
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What's wrong?
The affected 2006-2007 GMC W5500, W3500, Nrr, W4500, Nqr, and Npr trucks use engine oil pipes to move oil through the engine. Bolts clamp those pipes and their packing seals in place. The seals help keep oil inside the system while the engine is running under heat and vibration.
On these trucks, the oil pipe bolts were not tightened properly during production. After prolonged vehicle operation, a loose bolt can let oil seep or leak past the packing seals. As oil is lost, the engine loses the lubrication it needs, and the source recall says oil loss can lead to engine seizure.
Owners can look for the oil warning lamp and listen for abnormal engine noise. Those signs mean oil has already dropped or stopped moving correctly, so the truck needs service before more engine damage occurs.
Who's affected?
Covers W-series and N-series trucks from the 2006 and 2007 model years, all tied to the engine and engine cooling component.
| 2006 GMC W5500 | Engine and engine cooling |
|---|---|
| 2006 Chevrolet W3500 | Engine and engine cooling |
| 2006 Isuzu Nrr | Engine and engine cooling |
| 2006 GMC W4500 | Engine and engine cooling |
| 2007 GMC W5500 | Engine and engine cooling |
| 2007 Chevrolet W3500 | Engine and engine cooling |
| 2006 Isuzu Nqr | Engine and engine cooling |
| 2007 Isuzu Npr | Engine and engine cooling |
| 2006 Chevrolet W4500 | Engine and engine cooling |
| 2007 Chevrolet W5500 | Engine and engine cooling |
| 2006 Isuzu Npr | Engine and engine cooling |
| 2006 Chevrolet W5500 | Engine and engine cooling |
| 2007 Chevrolet W4500 | Engine and engine cooling |
| 2006 GMC W3500 | Engine and engine cooling |
| 2007 Isuzu Nrr | Engine and engine cooling |
| 2007 Isuzu Nqr | Engine and engine cooling |
| 2007 GMC W3500 | Engine and engine cooling |
| 2007 GMC W4500 | Engine and engine cooling |
| Units affected | 2,992 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
If the engine seizes while you are driving, the vehicle can slow suddenly and increase the risk of a crash. Drive cautiously until the recall work is complete, and arrange service with a GMC dealer. Repair will be free at any franchised GMC dealer once available.
What should I do?
- Check your VIN to confirm your 2006-2007 GMC W5500, W3500, Nrr, W4500, Nqr, or Npr is included in this recall.
- Contact a franchised GMC dealer and ask whether the oil-pipe bolt and packing-seal repair is open for your VIN.
- Bring the recall notice if you have it. If not, reference recall number 10V636 when you call.
- Watch for the oil warning lamp, abnormal engine noise, or oil leakage, and stop driving if those signs appear.
- Call GMC customer service at 1-800-255-6727 with questions about the recall repair.
What happens at the repair
At the dealer, a GMC technician replaces the packing seals with new seals and tightens the oil pipe bolt to the specified torque. Once the dealer remedy is available, that work is performed free under the recall. The repair addresses oil seepage or leakage from the packing seals caused by an oil pipe bolt that was not tightened properly during production. Parts and labor are covered.
Timeline
| December 15, 2010 | NHTSA published the recall |
|---|---|
| January 28, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 10V636?
Recall 10V636 covers 2,992 2006-2007 GMC W5500, W3500, Nrr, W4500, Nqr, and Npr vehicles with oil pipe bolts that were not tightened properly. The bolts can loosen, causing oil leakage, engine oil loss, and engine seizure. Dealers will replace the packing seals and tighten the bolt for free.
What should I do if my 2006-2007 GMC W5500, W3500, Nrr, W4500, Nqr, or Npr is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 10V636. If it is, contact a franchised GMC dealer to schedule the packing-seal replacement and oil pipe bolt tightening. Reference recall number 10V636 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and the recall remedy says dealers will replace the packing seals and tighten the bolt with the specified torque free of charge.
What is the safety risk?
The safety risk is sudden deceleration if the engine seizes while the vehicle is being driven. Recall 10V636 ties that seizure risk to oil leakage from improperly tightened oil pipe bolts, which can lead to oil loss and increased crash risk.
What warning signs should I watch for?
Watch for the oil warning lamp, abnormal engine noise, or signs of oil seepage or leakage. Those symptoms point to oil loss from the packing seals. If they appear, stop using the vehicle and contact a franchised GMC dealer before scheduling or moving it.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/10V636000 |
|---|---|
| GMC customer service | 1-800-255-6727 |
| NHTSA recall # | 10V636 |
| NHTSA recall # (full) | 10V636000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (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 →