NHTSA Recall 20V721000: Electrical system: wiring and hoses/lines/piping/fittings (engine and engine cooling)
Isuzu Technical Center of America, Inc. reported this safety recall to NHTSA on , covering an estimated 46 vehicles. It affects 2 models including the Chevrolet Low Cab Forward 4500.
| NHTSA campaign | 20V721000 |
|---|---|
| Manufacturer campaign | V2006 |
| Components | ELECTRICAL SYSTEM › WIRING; ENGINE AND ENGINE COOLING › COOLING SYSTEM › HOSES/LINES/PIPING/FITTINGS |
| Report received | November 20, 2020 |
| Owner notification | December 11, 2020 |
| Initiated by | Manufacturer |
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.
Safety 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.
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.
Notes
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.
Vehicles covered by recall 20V721000
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.