The defect
Isuzu Technical Center of America, Inc. (Isuzu) is recalling certain 2020 NPR-HD (Crew Cab) and Chevrolet 4500 (Crew Cab) vehicles equipped with 6.6L gasoline engines. The chassis harness and the coolant return hose from the radiator to the reservoir (surge hose) may chafe. Continued chafing could cause wear in the harness and/or hose, ultimately causing a hole in the hose with the potential for engine coolant to leak and/or causing damage to the harness with the potential for a short circuit.
The risk
Leaking engine coolant and/or a damaged wire harness may result in a no-start condition, an engine stall, or an electrical short. These scenarios increase the risk of a crash or fire.
The remedy
Isuzu and Chevrolet will notify their respective vehicle owners and dealers of this recall, and specifically of the need to adjust the positive cable in subject vehicles, and owners will be informed that the recall repairs will be done free of charge. The recall began December 11, 2020. For additional information, Isuzu owners may contact Isuzu Customer Relations at 1-866-441-9638 and Chevrolet owners may contact the GM Medium Duty Truck assistance line at 1-800-862-4389. Isuzu's number for this recall is V2006.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Chevrolet LOW Cab Forward 4500 | 2020 |
| Isuzu NPR HD | 2020 |
Components: ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS | ELECTRICAL SYSTEM:WIRING
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Chevrolet LOW Cab Forward 4500 | 2020 | 0 | 2 |
| Isuzu NPR HD | 2020 | 0 | 5 |
Other electrical system recalls in 2020
105 of the 782 recall campaigns reported to NHTSA in 2020 concerned the electrical system; Isuzu Technical Center of America, Inc. filed 23 campaigns in all.
| 20V812000 28 Dec 2020 | Marion Body Works Inc. |
| 20V805000 21 Dec 2020 | SVI Trucks |
| 20V801000 18 Dec 2020 | Keystone RV Company |
| 20V790000 17 Dec 2020 | General Motors, LLC |
| 20V798000 17 Dec 2020 | Honda (American Honda Motor Co.) |
| 20V779000 15 Dec 2020 | Rosenbauer America |
| 20V783000 15 Dec 2020 | Halcore Group, Inc. |
| 20V781000 15 Dec 2020 | Ducati North America |
NHTSA recalls (public domain) · all recalls of 2020