Find GMC Terrain fuse box diagrams and electrical details in one clean stop. This article covers the third-generation GMC Terrain, available from 2025 , with diagrams for GMC Terrain 2025 and 2026 , showing the fuse panel locations inside the vehicle and a clear breakdown of each fuse and relay assignment (fuse layout) so you can troubleshoot without playing hide-and-seek.
The under-hood fuse block is located in the engine compartment on the driver side of the vehicle, near the headlights.
Assignment of the fuses in the Engine Compartment Fuse Box
Fuse Data
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No. Short-Code Description F01 STRTR MTR Starter Motor F02 Spare Spare F03 ELM 5 Exterior Lighting Module Battery 5 F04 Spare Spare F05 Spare Spare F06 FTZM Fuel Tank Zone Module F07 Spare Spare F08 Spare Spare F09Z HSM_FT_BAT1 Front Heated Seat Module Battery 1 F09Y HSM_FT_BAT2 Front Heated Seat Module Battery 2 F10Z HSM_RR_1 Rear Heated Seat Module Battery 1 F10Y HSM_RR_2 Rear Heated Seat Module Battery 2 F11Z MSG_LT Driver Seat Lumbar Switch F11Y MSG_RT Passenger Seat Lumbar Switch F12 DEFOG_RR Rear Defog F13 Spare Spare F14 Spare Spare F15 PWR_SEAT_DR Driver Memory Seat Module Power F16 DSP_LT Left Front Window Motor F17 PWR_SEAT_CO Passenger Memory Seat Module Power F18 DC DC 1 DC-DC Converter Battery 1 F19 ECM PTIGN Engine Control Module Powertrain Ignition F20 ECM PTIGN 2 Engine Control Module Powertrain Ignition 2 F21Z OFF ENG1 Engine Sensor Power F21Y Spare Spare F22Z COIL_IGN_PWR Coil Ignition Power F22Y DPWR 2 Step Cam Intake Solenoid Power F23 Spare Spare F24 ECM / PCM 2 Engine Control Module / Powertrain Control Module 2 F25 A/C CLUTCH A/C Compressor Control Clutch F26 STRTR PINION Starter Motor Pinion F27 AWP Auxiliary Water Pump Battery F28 Spare Spare F29 Spare Spare F30 Spare Spare F31 TAOPM Trans Aux Oil Pump Module Battery F32 TCM_PCM Transmission Control Module Battery F33 Spare Spare F34 ST/TRN LT Light Duty Trailer Connector F35 Spare Spare F36 ACM Aero Shutter Module F37 EBCM BAT1 Electronic Brake Control Module Battery 1 F38 Spare Spare F39 WASH PUMP Wash Pump Motor F40 Spare Spare F41 Spare Spare F42 Spare Spare F43 M17_REAR Rear Wiper F44 Spare Spare F45 RFA Remote Function Receiver Battery F46 Spare Spare F47 TRLR Heavy Duty Trailer Connector F48 DSP_RT Right Front Window Motor F49 PTM Power Tailgate Module F50 SRC Sunroof F51 WIPER_FRT Front Wiper Motor F52 DASM Driveline Smart Actuator Module Battery F53 Horn Horn F54 BKUP Trailer Connector Reverse Light F55 PRK Trailer Park Light F56 CVS Canister Vent Solenoid F57 Spare Spare F58 ELM 4 Exterior Lighting Module Battery 4 F59Z DSP_DR Driver Door Switch Panel Battery F59Y DSP_CO Passenger Door Switch Panel Battery F60 WIP_DE_ICE Wiper Deice F61 ST/TRN RT Trailer Stop/Turn Light F62 Spare Spare F63 Spare Spare F64 Spare Spare F65 Spare Spare
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The instrument panel fuse block is located under the instrument panel, above the driver-side footrest.
Assignment of the fuses in the Passenger Compartment Fuse Box
Fuse Data
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No. Short-Code Description F01 BLOWER Front Blower Motor F02 ELM 6 Exterior Lighting Module 6 F03 HDLP_RT Headlight Right F04 ELM 2 Exterior Lighting Module 2 F05 BCM 2 Body Control Module 2 F06 BCM 1 Body Control Module 1 F07 SWC Steering Wheel Controls F08 ONSTAR OnStar F09 ETRS/SWBK Electronic Transmission Range Select / Switch Bank Battery F10Z IPD Instrument Panel Display F10Y VCD Virtual Cockpit Display F11Z LAMP_RT Taillight Right F11Y HVAC_D_OHC_UGDO Overhead Console Module Battery F12 Spare Spare F13Z SAFETY 2 Side Blind Zone Alert Battery 2 F13Y LAMP_LT Taillight Left F14Z RC_MISC_3 Run/Crank Miscellaneous 3 F14Y RC_MISC_4 Run/Crank Miscellaneous 4 F15 Spare Spare F16 APO_CARGO Auxiliary DC Power Outlet F17Z SAFETY 1_2 Sensing & Diagnostic Module Battery 1_2 F17Y SAFETY 1_1 Sensing & Diagnostic Module Battery 1_1 F18Z RC_MISC_1 Run/Crank Miscellaneous 1 F18Y RC_MISC_2 Run/Crank Miscellaneous 2 F19 SDM_RC Sensing & Diagnostic Module F20Z DLC Data Link Connector F20Y CGM Central Gateway Module F21Z VCU_JACK 1 Virtual Cockpit Unit Jack Battery 1 F21Y VCU_JACK 2 Virtual Cockpit Unit Jack Battery 2 F22 ECM_TCM_IGN Engine Control Module / Transmission Control Module Ignition F23 APO_USB Auxiliary Power Outlet (USB) F24 Spare Spare F25 Spare Spare F26 ELM 1 Exterior Lighting Module 1 F27 HSWM Heated Steering Wheel Module Battery F28 ELM 7 Exterior Lighting Module Battery 7 F29 HDLP_LT Headlight Left F30 Spare Spare F31 BCM 3 Body Control Module 3 F32 WCM Wireless Charging Module F33 Spare Spare F34 ELM 3 Exterior Lighting Module Battery 3 F35 AMP Amplifier (Audio) F36 DC/DC 2 DC-DC Converter Battery 2 F37 Spare Spare F38 Spare Spare F39 BCM 4 Body Control Module 4 F40 VCU_2 Virtual Cockpit Unit Battery 2
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