The ongoing global microchip shortage has resulted in lost production and reduced features for a variety of GM vehicles, including the removal of automatic engine stop-start from certain 2021 Chevy Silverado 1500 models. Now, we’re taking a closer look at the fuel economy numbers for 2021 Chevy Silverado 1500 models no longer equipped with automatic engine stop-start.
For those readers who may be unaware, automatic engine stop-start was designed to reduce emissions and improve fuel economy by automatically turning the engine off when the vehicle is stopped, such as in heavy traffic or at a stop light. The system will then restart the engine when the driver removes their foot from the brake, allowing it to continue forward.
According to General Motors, most 2021 Chevy Silverado 1500 models built after June 7th, 2021 with a V8 engine and 10-speed automatic transmission will not be equipped with automatic engine stop-start. That includes RST, LTZ, and High Country trim levels equipped with the naturally aspirated 6.2L V8 L87, plus LT Trail Boss models equipped with either the naturally aspirated 5.3L V8 L84 or the naturally aspirated 6.2L V8 L87.
To note, 2021 Chevy Silverado 1500 models not equipped with automatic engine stop-start may still be equipped with Dynamic Fuel Management, which automatically shuts down engine cylinders under light load to maximize fuel economy. That said, the chip shortage has also resulted in some 2021 Chevy Silverado 1500 models being built without Active Fuel Management and Dynamic Fuel Management, with GM offering a $50 credit for those models which normally would offer the systems.
With that covered, check out the complete fuel economy breakdown below:
|Trim Level||Drivetrain||Engine||Transmission||Auto Stop/Start||Cylinder Deactivation||City mpg||Highway mpg||Combined mpg||Effective Date|
|All||2WD||Turbo 2.7L I4 L3B||8-speed auto||Yes||AFM||20||23||21||Start of 2021 MY|
|All||4WD||Turbo 2.7L I4 L3B||8-speed auto||Yes||AFM||19||22||20||Start of 2021 MY|
|All||2WD||4.3L V6 LV3||6-speed auto||No||AFM||16||21||17||Start of 2021 MY|
|All||4WD||4.3L V6 LV3||6-speed auto||No||AFM||15||20||17||Start of 2021 MY|
|Custom Trail Boss||4WD||4.3L V6 LV3||6-speed auto||No||AFM||14||18||16||Start of 2021 MY|
|All||2WD||5.3L V8 L82||6-speed auto||No||AFM||15||21||17||Start of 2021 MY|
|All||2WD||5.3L V8 L82 FFV||6-speed auto||No||AFM||15||19||16||Start of 2021 MY|
|All||2WD||5.3L V8 L82||6-speed auto||No||No||14||21||16||March 22, 2021|
|All||4WD||5.3L V8 L82||6-speed auto||No||AFM||15||20||17||Start of 2021 MY|
|All||4WD||5.3L V8 L82||6-speed auto||No||No||14||20||16||March 22, 2021|
|All||4WD||5.3L V8 L82 FFV||6-speed auto||No||AFM||14||18||16||Start of 2021 MY|
|Custom Trail Boss||4WD||5.3L V6 L82||6-speed auto||No||AFM||14||18||16||Start of 2021 MY|
|Custom Trail Boss||4WD||5.3L V6 L82||6-speed auto||No||No||13||18||15||March 22, 2021|
|All||2WD||5.3L V8 L84||8-speed auto||Yes||DFM||17||23||19||Start of 2021 MY|
|All||2WD||5.3L V8 L84||8-speed auto||Yes||No||15||22||17||March 22, 2021|
|All||4WD||5.3L V8 L84||8-speed auto||Yes||DFM||16||22||18||Start of 2021 MY|
|All||4WD||5.3L V8 L84||8-speed auto||Yes||No||14||21||16||March 22, 2021|
|All||4WD||5.3L V8 L84||10-speed auto||Yes||DFM||16||22||19||Start of 2021 MY|
|All||4WD||5.3L V8 L84||10-speed auto||No||DFM||15||21||18||June 7, 2021|
|LT Trail Boss||4WD||5.3L V8 L84||10-speed auto||Yes||DFM||16||21||18||Start of 2021 MY|
|LT Trail Boss||4WD||5.3L V8 L84||10-speed auto||No||DFM||15||21||17||June 7, 2021|
|All||4WD||6.2L V8 L87||10-speed auto||Yes||DFM||16||21||18||Start of 2021 MY|
|All||4WD||6.2L V8 L87||10-speed auto||No||DFM||15||20||17||June 7, 2021|
|LT Trail Boss||4WD||6.2L V8 L87||10-speed auto||Yes||DFM||15||19||17||Start of 2021 MY|
|LT Trail Boss||4WD||6.2L V8 L87||10-speed auto||No||DFM||14||19||16||June 7, 2021|
|All||2WD||Turbodiesel 3.0L I6 LM2||10-speed auto||Yes||No||23||33||27||Start of 2021 MY|
|All||4WD||Turbodiesel 3.0L I6 LM2||10-speed auto||Yes||No||22||26||24||Start of 2021 MY|