Four Out Of Seven 2021 GMC Models Offer Automatic Stop-Start Feature
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General Motors is reducing the environmental impact of its new models by installing the automatic stop-start engine feature. The feature is so pervasive, four out of seven 2021 GMC models are equipped with it.
Looking over a list of the latest 2021-model-year GMC models, we find the 2021 GMC Acadia, the 2021 GMC Sierra 1500, the 2021 GMC Terrain, and the 2021 GMC Yukon all equipped with automatic stop-start. As such, the majority of new GMC models get the fuel-saving feature.
| Model | Auto Stop-Start |
|---|---|
| GMC Acadia | S |
| GMC Canyon | - |
| GMC Savana | - |
| GMC Sierra 1500 | A1 |
| GMC Sierra HD | - |
| GMC Terrain | S |
| GMC Yukon | S |
- S – Standard with all trim levels and powertrains.
- Not available with 4.3L V6 LV3 and 5.3L V8 L82 engines.
As a reminder, vehicles equipped with automatic stop-start will automatically shut down the engine when at a stop, such as in heavy traffic, at a stoplight, or while parked. As such, the vehicle conserves fuel, with upwards of six percent higher fuel economy returns in the city compared to similarly equipped vehicles without automatic stop-start.
As soon as the driver removes their foot from the brake, the engine automatically restarts, allowing the vehicle to once again drive forward.
As GM Authority covered previously, half of all Chevrolet models offer automatic stop-start for the 2021 model year, while every 2021-mode-year Cadillac offers the feature.
While automatic stop-start is a great way to eke out a few extra mpg in the city, some owners have criticized the feature as being overly disruptive. With the engine turned off at a stop, critics say that automatic stop-start can result in a slight hesitation off the line, as well as additional vibrations in the cabin as the engine restarts after the driver removes their foot from the brake pedal. Some models come equipped with the ability to turn the feature off, such as the Cadillac XT5, while some owners have devised workarounds to ensure the feature doesn’t activate.
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No benefit to customer, only GM for pollution credits.
Those credit are what helps keep the V8 viable in larger numbers.
It’s a scam, I bought a module to disable mine
It’s a steaming pile of crap with no benefit to owners and a while lot of extra nonsense to break down in our vehicles. They could at least have the decency to put a disable button on the dash! Or a setting in our menus to always disable it. It’s software. Add a setting!!
This feature sucks and is annoying. Can’t imagine it saves that much on emission by killing the motor for 30-45 seconds at a stop light. Plus it has to be tough on the mechanicals to start and stop that often. More ware and tear for not much benefit.
In at least the 2021 Yukon, the auto-start causes the power to cut out to accessories plugged into the outlets (eg. A streaming device connected to the HDMI TVs) and hardwired (eg. Radar detectors). Due to that flaw, I have to disable it manually all the time.
Turn that garbage off!If you like destroying starters, batteries and engines leave it on.Engine wear is highest at startup and starters and batteries only have a limited life so constantly starting and stopping and starting again will prematurely wear this stuff out.Use the disable feature.
Just an annoying ploy to get us to go All Electric which has no need of Stop/Start. Piss off the Americans in order to make them globalists. I am looking for a 1967 GTO. Screw em.
My concern is I wonder if the starter is up to the additional use and/or will GM fix it when the warranty expires.
I believe these cars require batteries that are much more expensive to replace.
I’ve Always wondered about Starter wear and tear…also the hesitation factor over time…