2019-2024 Chevrolet Blazer Auto Start Stop Eliminator | Plug & Play

This plug-and-play memory harness is for the 2019–2024 Chevrolet Blazer. It stores the last stop-start setting you chose, so if you turned Auto Stop/Start off on one drive, it stays off the next time you start the engine. It plugs in line with the factory connector named in the instructions, using factory-style plugs on both ends, so nothing is cut or spliced.

Nothing is reprogrammed in the engine computer. The module only stands in for the button press you would otherwise make after every start, and it comes out without leaving a trace.

Which Chevrolet Blazer models it fits

This part is listed for these vehicles, all marked 100% fitment match:

• Chevrolet Blazer: 2019–2024

For reference, the Chevrolet Blazer in these years is a midsize crossover offered with 2.5L four-cylinder, 2.0L turbo and 3.6L V6 engines. The listing is written around the first-generation (2019-up) Blazer. The table does not separate trims; what matters is that the vehicle has factory stop-start and the connector shown in the photos.

What the factory system does

On the Chevrolet Blazer, Auto Stop/Start shuts the engine down at a stop and fires it back up as the brake is released. You can switch it off with the dash button, but the choice is not saved. The next ignition cycle brings the default back. The module keeps the choice you made instead.

Installing the plug-and-play memory harness

It plugs in line with the factory connector named in the instructions, using factory-style plugs on both ends, so nothing is cut or spliced. Because it is plug-in only, removal is the reverse: unplug the module and reconnect the factory connectors directly. Keep the original clips and trim fasteners if you remove a panel to reach the connector.

Conditions the factory system checks

Even with Auto Stop/Start enabled, the engine control logic only stops the engine when conditions allow it. Typical blockers are a low battery state of charge, an engine that has not reached operating temperature, heavy heating or A/C demand, steering input, an open door or unlatched seatbelt, and some drive modes. If the system never seems to stop the engine, one of these is usually the reason, and the module does not change that logic.

What the module does and does not do

• It does not change engine power, transmission shifts, emissions calibration or fuel trims.
• It remembers the last stop-start setting through a key cycle.
• It leaves the factory button working, so you can turn stop-start back on whenever you want.
• It does not write anything to the vehicle's modules, and removing it restores the stock default.

A note on the battery

Most stop-start systems watch battery condition closely through a sensor on the negative terminal. When the battery ages, the system quietly stops auto-stopping long before the battery fails to crank. Keeping the original battery type (AGM or EFB) and a clean, tight ground connection avoids a lot of confusion about why the system behaves differently from week to week.

Typical reasons to keep it off

Drivers usually switch stop-start off for comfort or habit. A restart at every stop is noticeable in a midsize crossover, the climate system may run at reduced output while the engine is off, and quick moves into traffic feel slower when the engine has to fire first. If those are your reasons, you probably press the button on every drive now. With the module, you press it once.

If something does not look right

If the setting is not remembered, check that the module was installed with the ignition off and that the connector clicked into place. Then press the factory button once, switch the vehicle off, close the doors, give the electronics time to shut down, and start again. If it still resets, contact support with the year, trim and a photo of the connector.

Fitment check

• Model year and model match a row in the table above (2019–2024 Chevrolet Blazer).
• Your Chevrolet Blazer has the factory stop-start button. Base trims or engines without stop-start have nothing for the module to remember.
• The connector at your install point matches the one in the product photos.
• No aftermarket remote start, alarm or gateway bypass is wired into the same circuit. If one is, email support before ordering.
• The battery and charging system test good and no warning lights are on.
• If you are unsure, send your VIN to support@automotivebypass.com and we will confirm fitment.

Shipping and support

Standard shipping inside the lower 48 states costs nothing; allow 1–2 business days of handling plus 3–4 in transit. Returns need approval first and must be requested within 45 days. Approved returns are subject to a 20% restocking fee, with return shipping paid by the customer. A 3-year limited warranty applies. Email support@automotivebypass.com (Mon–Fri, 9–5 PST) with your VIN if you want a fitment check.