Fitment notes: AGM required for start-stop system; H8 (Group 49) size; located under hood on passenger side
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Every control module on the 2021-2026 Chevrolet Suburban — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
📍 Behind center stack touchscreen display, integrated with radio head unit
🔧 GM Techline Connect
⚠️ Chevrolet Infotainment 3 system (2021-2023) or Infotainment 4 (2024+). VIN and feature configuration required. 10.2-inch standard screen.
Seat Control Module (SCM)1.0 hr R&Rrelearn only +0.2 hrwith power adjustable pedals or memory seats▸ programming details
📍 Under driver seat, integrated with seat frame driver side
🔧 Scan tool with seat memory relearn
⚠️ Seat position and memory calibration required. May also control heated/ventilated/massaging seats on High Country.
Magnetic Ride Control Module (MRSCM)1.0 hr R&Rdealer / factory tool +0.4 hrPremier and High Country trims with Magnetic Ride Control▸ programming details
📍 Under rear cargo floor, driver side, near spare tire well
🔧 GM Techline Connect
⚠️ Damper calibration and ride height sensor configuration required. Also controls Air Ride adaptive suspension on 2024+ High Country.
📍 Behind instrument panel, center of driver side dash
🔧 GM Techline Connect
⚠️ Mileage programming from BCM required. VIN and vehicle configuration must be programmed. Fully digital cluster on High Country and RST trims.
Headlamp Control Module (HCM)0.8 hr R&Rrelearn only +0.2 hrwith LED or adaptive LED headlamps▸ programming details
📍 Behind front bumper fascia, driver side headlamp assembly
🔧 Scan tool with headlamp aim function
⚠️ Headlamp leveling calibration required. Adaptive LED headlamps available on High Country trim.
Trailer Brake Control Module (TBCM)0.8 hr R&Rrelearn only +0.2 hrwith factory trailer brake controller▸ programming details
📍 Under driver seat, mounted to floor pan
🔧 Scan tool with trailer brake calibration
⚠️ Trailer brake gain calibration required after replacement. Integrated trailer brake controller standard on most trims.
Fuel Pump Control Module (FPCM)0.6 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Under vehicle, mounted to frame rail driver side near fuel tank
🔧 Scan tool with fuel pump relearn function
⚠️ Fuel pump speed calibration relearn recommended after replacement.
Rear Vision Camera Module (RVCM)0.5 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Integrated with liftgate handle assembly, center of liftgate
🔧 Scan tool with camera alignment function
⚠️ Dynamic guideline calibration recommended. HD Surround Vision available on higher trims with additional cameras.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2025 Chevrolet Suburban 3.0L I6 Duramax and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.