Chassis harness/coolant return hose could chafe
Defect Summary
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 Consequence
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.
Corrective Action
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.
Similar Recalls
Other recalls from Isuzu Motors Limited or involving Electrical System.
FAQ: Recall 20V721000
Your rights, the repair process, and what each field on this page means.
What is recall 20V721000?
NHTSA recall 20V721000 was issued by Isuzu Motors Limited on November 20, 2020. It addresses: Chassis harness/coolant return hose could chafe. The recall affects approximately 46 vehicles, with the defect involving the Electrical System component.
How do I get this recall repaired?
Contact any authorized Isuzu Motors Limited dealer and reference NHTSA recall ID 20V721000 or the manufacturer campaign number V2006. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.