Option code NHT · Towing
Max Trailering Package
The tow package that actually changes ratings: upgraded axle, springs and cooling. A used truck with NHT is a different machine than one without.
Documented on
- Silverado, Sierra, Tahoe, Suburban
How to confirm it on a real car
GM RPO records factory equipment on the Service Parts Identification (SPID) label in the glovebox. Stickers go missing and cars get modified, so the ground truth for any specific VIN is the factory build record: every option code the car was born with, including NHT if it was ordered.
Was NHT on your car's original build?
The CarWhere build sheet decodes any GM VIN into its full factory record — every option code, the original paint, trim and equipment, as built. $9.99, instant.
More towing codes
Independent reference; not affiliated with GM RPO. Applicability varies by market and model year.