{"product_id":"auto-start-stop-eliminator-2019-2021-gmc-sierra-1500-start-stop-memory-module","title":"2019-2021 GMC Sierra 1500 Auto Start Stop Memory Module | Plug \u0026 Play","description":"\u003cp\u003eFits the 2019–2021 GMC Sierra 1500. The plug-and-play memory harness remembers the position of the stop-start button between drives, so the engine no longer shuts off at the first red light after every restart unless you want it to. 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.\u003c\/p\u003e\u003cp\u003eIt does not delete the feature. Turning stop-start back on is the same button press as before, and the module will remember that too. Removing it returns the vehicle to its original default.\u003c\/p\u003e\u003ch2\u003eFitment\u003c\/h2\u003e\u003cp\u003eThe fitment table for this SKU lists the following, each marked as a 100% fitment match:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eGMC Sierra 1500: 2019–2021\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eFor reference, the GMC Sierra 1500 in these years is a full-size pickup offered with 2.7L turbo four-cylinder, 4.3L V6, 5.3L V8, 6.2L V8 and 3.0L Duramax turbo-diesel engines. The listing is written around the fifth-generation (2019-up) Sierra 1500. Trim levels are not split out in the table, so confirm that your vehicle has the stop-start button before ordering.\u003c\/p\u003e\u003ch2\u003eWhat the factory system does\u003c\/h2\u003e\u003cp\u003eWith Auto Stop\/Start active, the engine shuts off when the vehicle comes to a stop and restarts when you lift off the brake or press the accelerator. The off button is a manual override for that drive only. Turn the ignition off and back on, and the system defaults to on again, so drivers who prefer it off end up pressing the button at the start of every trip.\u003c\/p\u003e\u003ch2\u003eDay-to-day use\u003c\/h2\u003e\u003cp\u003eDrivers usually switch stop-start off for comfort or habit. A restart at every stop is noticeable in a full-size pickup, 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.\u003c\/p\u003e\u003ch2\u003eWhen the engine will not auto-stop anyway\u003c\/h2\u003e\u003cp\u003eThe factory system will skip an auto stop for many reasons: battery charge below its threshold, cold coolant, high climate-control load, a steep grade, the hood or driver door open, or a 4WD or tow mode on vehicles that have them. Those checks stay in control after this module is installed. It does not force stops and it does not bypass any of those safety inputs.\u003c\/p\u003e\u003ch2\u003eWhat the module does and does not do\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIt leaves the factory button working, so you can turn stop-start back on whenever you want.\u003c\/li\u003e\n\u003cli\u003eIt does not write anything to the vehicle's modules, and removing it restores the stock default.\u003c\/li\u003e\n\u003cli\u003eIt remembers the last stop-start setting through a key cycle.\u003c\/li\u003e\n\u003cli\u003eIt does not change engine power, transmission shifts, emissions calibration or fuel trims.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDiagnostics first\u003c\/h2\u003e\u003cp\u003eA warning light that appears after installation usually means a connector is not fully seated. Switch the ignition off, reseat both ends until the locks click, and test again. If the light stays on, remove the module and confirm the vehicle is fault-free on its own before contacting support.\u003c\/p\u003e\u003ch2\u003eInstallation and removal\u003c\/h2\u003e\u003cp\u003eIt plugs in line with the factory connector named in the instructions, using factory-style plugs on both ends, so nothing is cut or spliced. Work with the ignition off. Seat each connector until its lock engages, then secure the module with the supplied ties or tape so it cannot rattle or touch pedals, steering parts or anything hot. Start the vehicle, press the stop-start button once, then restart to confirm the choice is held.\u003c\/p\u003e\u003ch2\u003eBattery notes for stop-start vehicles\u003c\/h2\u003e\u003cp\u003eMost 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.\u003c\/p\u003e\u003ch2\u003eFitment check\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModel year and model match a row in the table above (2019–2021 GMC Sierra 1500).\u003c\/li\u003e\n\u003cli\u003eYour GMC Sierra 1500 has the factory stop-start button. Base trims or engines without stop-start have nothing for the module to remember.\u003c\/li\u003e\n\u003cli\u003eThe battery and charging system test good and no warning lights are on.\u003c\/li\u003e\n\u003cli\u003eNo aftermarket remote start, alarm or gateway bypass is wired into the same circuit. If one is, email support before ordering.\u003c\/li\u003e\n\u003cli\u003eThe connector at your install point matches the one in the product photos.\u003c\/li\u003e\n\u003cli\u003eIf you are unsure, send your VIN to support@automotivebypass.com and we will confirm fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eYear-by-year fitment\u003c\/h2\u003e\u003cp\u003eOne row per model year, taken from the fitment data for this SKU:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine \/ trim\u003c\/th\u003e\n\u003cth\u003eListing note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003eAll with factory stop-start\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003eAll with factory stop-start\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003eAll with factory stop-start\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhy stop-start resets at every start\u003c\/h2\u003e\u003cp\u003eUS fuel-economy testing explains the reset. If a stop-start system is non-latching, meaning it switches back on whenever the vehicle is restarted, the EPA measures fuel economy with the system working. If the driver can switch it off permanently, the EPA tests with it both on and off and averages the two, which gives a lower number. Manufacturers therefore make the system come back on at every start, and drivers who prefer it off end up pressing the button each trip.\u003c\/p\u003e\u003ch2\u003eTerms used on this page\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAuto Stop\/Start:\u003c\/strong\u003e GMC's name for the automatic engine stop-start feature on the GMC Sierra 1500.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAGM \/ EFB battery:\u003c\/strong\u003e Battery types designed for the frequent cycling of stop-start vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNon-latching:\u003c\/strong\u003e A setting that does not stay where the driver left it after a restart.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey cycle:\u003c\/strong\u003e One switch-off and restart of the vehicle. Factory stop-start resets at each key cycle.\u003c\/p\u003e\u003ch2\u003eTroubleshooting after installation\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eSetting not remembered:\u003c\/strong\u003e Check that both connectors are fully latched, then set Auto Stop\/Start the way you want it, switch the vehicle fully off and restart.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eStop-start indicator flashes or shows unavailable:\u003c\/strong\u003e The vehicle is reporting a condition such as low battery charge, high climate demand or a cold engine. That comes from the factory logic, not the module.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarning message after fitting:\u003c\/strong\u003e Unplug the module, reconnect the factory connector and see whether the message clears. Contact support with the VIN and a photo of the connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eEngine still stops at lights:\u003c\/strong\u003e That means Auto Stop\/Start was left on before shutdown. Press the button once to switch it off; the module remembers that choice from the next start.\u003c\/p\u003e\u003ch2\u003ePreparing for installation\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSwitch everything off and take the key or fob out of range.\u003c\/li\u003e\n\u003cli\u003eGo through the model-specific instructions first.\u003c\/li\u003e\n\u003cli\u003eMatch the vehicle connector to the module before unplugging anything.\u003c\/li\u003e\n\u003cli\u003eRelease clips with a trim tool instead of pulling on wires.\u003c\/li\u003e\n\u003cli\u003eListen for the click on each latch.\u003c\/li\u003e\n\u003cli\u003eTie the module down so it stays quiet and away from moving parts.\u003c\/li\u003e\n\u003cli\u003eRun a restart test to confirm the memory works before refitting trim.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat sits behind the system\u003c\/h2\u003e\u003cp\u003eVehicles with stop-start are built for many more engine starts than a conventional car. They typically use an AGM (absorbent glass mat) or EFB (enhanced flooded) battery that tolerates frequent cycling, along with a strengthened starter. The memory module does not change any of that hardware. When the battery reaches the end of its life, replace it with the same type and size listed for your vehicle, because a standard flooded battery is not designed for this duty.\u003c\/p\u003e\u003ch2\u003eQuestions owners ask\u003c\/h2\u003e\u003ch3\u003eWill Auto Stop\/Start come back on when I restart my GMC Sierra 1500?\u003c\/h3\u003e\u003cp\u003eNot if you turned it off before shutting down. The module repeats your last selection at the next start. If you leave it on, it stays on.\u003c\/p\u003e\u003ch3\u003eWhy does my GMC Sierra 1500 sometimes not auto-stop even when the system is on?\u003c\/h3\u003e\u003cp\u003eThe factory logic checks battery charge, engine temperature, climate load and other inputs. If any are outside range it keeps the engine running. The module does not affect those checks.\u003c\/p\u003e\u003ch3\u003eDoes the stop-start button still work after installation on the GMC Sierra 1500?\u003c\/h3\u003e\u003cp\u003eYes. The factory button works normally. The module simply stores whatever you chose last.\u003c\/p\u003e\u003ch3\u003eDoes it change engine power or fuel trims?\u003c\/h3\u003e\u003cp\u003eNo. It does not reprogram the engine or transmission computers. It only stores the stop-start button state.\u003c\/p\u003e\u003ch3\u003eWhich GMC Sierra 1500 years does this fit?\u003c\/h3\u003e\u003cp\u003eThe listed range is 2019–2021. Check the fitment table on this page against your exact model year.\u003c\/p\u003e\u003ch3\u003eDoes my GMC Sierra 1500 need the factory stop-start button for this to work?\u003c\/h3\u003e\u003cp\u003eYes. The module works with the factory stop-start system and its button. A vehicle built without stop-start has no setting for it to remember.\u003c\/p\u003e\u003ch3\u003eIs this the same part for every GMC?\u003c\/h3\u003e\u003cp\u003eNo. Connectors and the module that holds the stop-start state differ by platform, so this SKU is matched to the fitment rows on this page. Send the VIN to support if you are unsure.\u003c\/p\u003e\u003ch3\u003eWhy does Auto Stop\/Start turn itself back on every time?\u003c\/h3\u003e\u003cp\u003eAutomakers set stop-start to default to on at each start. Under EPA test rules, a system that stays off after shutdown is tested both on and off and the results are averaged, which lowers the rated fuel economy, so most systems reset at every key cycle. The module carries your last choice across that reset.\u003c\/p\u003e\u003ch3\u003eDoes it change how the battery is charged?\u003c\/h3\u003e\u003cp\u003eNo. Charging is still managed by the vehicle. Stop-start vehicles normally use an AGM or EFB battery built for frequent restarts; replace it with the same type when it wears out.\u003c\/p\u003e\u003ch3\u003eHow does it connect?\u003c\/h3\u003e\u003cp\u003eIt plugs in line with the factory connector named in the instructions, using factory-style plugs on both ends, so nothing is cut or spliced.\u003c\/p\u003e\u003ch3\u003eWill it fix a \"stop-start unavailable\" message?\u003c\/h3\u003e\u003cp\u003eNo. That message usually points to the battery or a sensor. Diagnose and repair that first.\u003c\/p\u003e\u003ch3\u003eWhat happens if I unplug it?\u003c\/h3\u003e\u003cp\u003eThe vehicle returns to the factory default, with Auto Stop\/Start switched on at every start.\u003c\/p\u003e\u003ch3\u003eCan I remove it later?\u003c\/h3\u003e\u003cp\u003eYes. Unplug the module and reconnect the factory connector; the vehicle returns to its stock default.\u003c\/p\u003e\u003ch2\u003eOrdering details\u003c\/h2\u003e\u003cp\u003eShipping is free to the contiguous US. Orders leave in 1–2 business days and usually arrive 3–4 business days later. Returns are accepted within 45 days with pre-approval; a 20% restocking fee applies and the buyer covers return shipping. The part carries a 3-year limited warranty, and support@automotivebypass.com answers Monday to Friday, 9–5 Pacific.\u003c\/p\u003e","brand":"Automotivebypass","offers":[{"title":"Default Title","offer_id":56493810385268,"sku":"RC-ASSE-30-02","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/2019-2021_GMC_Sierra_1500_Auto_Start-Stop_Eliminators_1_0b07a758-10bf-4613-8427-3eb621a515f4.jpg?v=1793347880","url":"https:\/\/automotivebypass.com\/products\/auto-start-stop-eliminator-2019-2021-gmc-sierra-1500-start-stop-memory-module","provider":"Automotivebypass","version":"1.0","type":"link"}