How to Disable Auto Start/Stop on Your Silverado
How to Disable Auto Start/Stop on Your GM Truck
You can turn off Auto Start/Stop with the dash "A" button — here's exactly how. And one honest heads-up: Auto Start/Stop is a separate system from AFM/DFM, so a cylinder-deactivation disabler won't switch it off.
If your truck's engine shuts off at every red light, you're not alone — Auto Start/Stop is one of the most-disliked features on modern GM vehicles. The good news: turning it off is easy. This guide from gadon.store shows the real ways to disable Auto Start/Stop, clears up a common mix-up with AFM/DFM, and points you to the upgrade that actually protects your engine long-term.
What Auto Start/Stop Actually Does
Auto Start/Stop shuts the engine off when you come to a complete stop and restarts it when you lift off the brake — a fuel-saving and emissions feature. Many drivers find it intrusive in traffic, at drive-throughs, or when they idle for work. It's a comfort/efficiency system, and GM lets you switch it off — though by default it turns back on each time you start the truck.
How to Turn It Off
Method 1 — The dash "A" button (free)
Look for the button showing a circular arrow with an "A" inside, usually on the dash to the right of the steering wheel or near the shifter.
- › 2022 and newer: a single press usually toggles it off.
- › 2019–2021: on some models, press and hold for about 20 seconds.
- › The indicator light confirms it's off — until your next engine start.
The catch: it resets to ON every time you restart the truck, so you press it each drive.
Method 2 — An auto-stop "eliminator" device
If pressing the button daily isn't for you, there are dedicated plug-and-play auto-stop eliminator modules that install behind the "A" button and remember your preference, so the system stays off. These are a different product category from a cylinder-deactivation disabler — make sure any device you buy specifically lists Auto Start/Stop.
Important: Auto Start/Stop ≠ AFM/DFM
This trips up a lot of owners, so let's be clear. These are two separate systems with two separate fixes:
⚠ To be completely clear
The Gadon™ AFM/DFM Disabler does not turn off Auto Start/Stop. It's built for cylinder deactivation (AFM/DFM) — the system tied to shudder, oil consumption, and expensive lifter failures. Use the "A" button or an eliminator device for Auto Start/Stop; use the disabler for AFM/DFM.
While You're At It — the Bigger Engine Risk
Most people who want Auto Start/Stop gone also dislike how their truck constantly drops cylinders while cruising. That's AFM/DFM — and unlike Auto Start/Stop, it's not just an annoyance. The constant V4↔V8 switching stresses specialized lifters, and when one sticks you get misfires, oil consumption, and potential lifter failure: a repair that commonly runs $3,000–$8,000. That's the system worth shutting down for your engine's health.
Gadon™ AFM/DFM Disabler
Keeps your GM V8 in full-cylinder mode — addressing the shudder, oil burn, and lifter wear behind $3,000–$8,000 repairs. Plug-and-play, no ECU reprogramming, fully removable. (Handles AFM/DFM only — not Auto Start/Stop.)
Pay $99.99 now — or $4,000 later.
Not sure which system is bugging you?
Describe what your truck's doing — our GM specialists tell you if it's Auto Start/Stop or AFM/DFM in about 2 minutes.
Disabling AFM/DFM — 3 Steps
Under the driver-side dash. Engine off.
Push until flush; lights flash to confirm.
Full V8 mode — no V4 icon, no shudder.
Real-World Drive Upgrade (AFM/DFM)
Results may vary by vehicle, driving habits, and operating conditions. Reflects feedback related to AFM/DFM cylinder deactivation, not Auto Start/Stop.
What Drivers Are Saying
"My Sierra feels calmer on the highway and around town. The constant switching sensation is way less noticeable now."
"I plugged it in before work and was done. No tools, no tune, no headaches."
"I just wanted something simple that helped the truck feel more consistent. This was a clean, no-nonsense fix."
Disabler Compatibility
The Gadon™ Disabler fits 90+ GM models from 2004–2024 with AFM or DFM — Silverado, Sierra, Tahoe, Yukon, Escalade, Suburban, Denali and more (V6 and V8).
Not a fit / not its job: it does not disable Auto Start/Stop. It's also not compatible with 10-speed transmissions, 2025–2026 models, diesel (Duramax), or pre-AFM engines. Not sure? Use our Compatibility Checker or send your VIN.
Quick FAQs
Does the Gadon disabler turn off Auto Start/Stop?
Why does Auto Start/Stop turn back on every time I drive?
Is Auto Start/Stop bad for my engine?
Will the disabler void my warranty?
How hard is the disabler to install?
Turn Off the Annoyance — and Protect the Engine
Use the "A" button for Auto Start/Stop. For the AFM/DFM cylinder switching that actually wears your engine, the disabler is plug-and-play with a 90-day money-back guarantee. Code WELCOME = 10% off.
Add to Cart – $99.99 →Questions first? Call +1 813-408-1627.
Disclaimer: Auto Start/Stop disable steps vary by model year and trim — confirm the exact procedure in your owner's manual. The Gadon AFM/DFM Disabler manages AFM/DFM cylinder deactivation only and does not disable Auto Start/Stop. It prevents AFM/DFM-related wear and does not repair existing mechanical damage. Always park safely before interacting with the OBD2 port. Contact contact@gadon.store for support on your specific GM model. Prices are for reference at publishing and subject to change.
