2021 Chevrolet Silverado Medium Duty Changes, Updates, New Features

Introduced for the 2019 model year and developed in collaboration with Navistar, the 2021 Silverado Medium Duty line – which includes 4500HD, 5500HD, and 6500HD models – gets the following minor changes and updates:

Exterior

Addition of five exterior colors
- Smokey Quartz Metallic
- Mosaic Black Metallic
- Northsky Blue Metallic
- Shadow Gray Metallic
- Satin Steel Metallic
Addition of rear window delete, which requires one of the following:
- Shuttle Bus Package
- School Bus (Non-Conforming) Package
- Emergency Service Package

Interior

Addition of HVAC provisions auxiliary A/C compressor

Mechanical

Addition of StabiliTrak as standard on all models
Addition of Neutral-at-Stop, which is standard on all models standard
- The functionality involves the automatic transmission shifting to neutral when the service brake is depressed while the vehicle is at a complete stop, and remaining in neutral until the service brake is released
Addition of FuelSense 2.0 transmission shift control calibration, which is available on all models
Upfitter switch kit is now standard
- For the 2020 model year, this feature was only available for models equipped with the Emergency Service Package, which also included:
  - Dual alternators
  - Upfitter box switchbank
  - Exhaust brake
  - Backup alarm
  - End of cab wiring provisions
  - Requires DPF, diesel particulate filter, manual regeneration and Emergency Service transmission, (MBY), (MH1), (MHV) or (MG0)
  - Not available with electronic speed sensor set to 55 MPH or with (G80) heavy-duty locking rear differential
Exhaust brake is now standard
- For the 2020 model year, this feature was only available for models equipped with the Emergency Service Package
Addition of an open rear axle, non-locking rear as the standard differential
Limited-slip Dana Spicer axle is now an available option
- For the 2020 model year, this was the standard rear differential