Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2013EXPRESS 2500 V8-4.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTDIAGRAMSELECTRICAL DIAGRAMS
2013 Chevrolet Express 2500 V8-4.8L
Electrical Diagrams
2013 Chevrolet Express 2500 V8-4.8LSECTION Electrical Diagrams
Engine Controls Schematics
Module Power, Ground, Serial Data and MIL
AIRBAG, BRK SW, ECM IGN/GLOW PLUG MDL IGN, FCSM IGN, IPC, STR/WHL/SNSR, TCM IGN, and TRANS Fuses
Electrical Center Identification Views
AIRBAG, BRK SW, ECM IGN/GLOW PLUG MDL IGN, FCSM IGN, IPC, STR/WHL/SNSR, TCM IGN, and TRANS Fuses
AIRBAG, BRK SW, ECM IGN/GLOW PLUG MDL IGN, FCSM IGN, IPC, STR/WHL/SNSR, TCM IGN, and TRANS Fuses
CNSTR VENT SOL, ECM BATT, FCSM BATT, and WPR Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, EVEN IGN/INJ, FUEL HTR, and V6 FUEL INJ Fuses
FAN CLTCH (EV) and ODD IGN/INJ Fuses
Accessory Wakeup
High Speed GMLAN (Gas)
G103, G104, G105 and G106
5V1, 5V2, and Low Reference Bus
Engine Data Sensors - Pressure and Temperature Controls
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
G103, G104, G105 and G106
Engine Data Sensors - Heated Oxygen Sensors (1 of 2)
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
Engine Data Sensors - Heated Oxygen Sensors (2 of 2)
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
Engine Data Sensors - Throttle Controls
Stop Lamp Controls and CHMSL
Ignition Controls - Ignition System Coils 1, 3, 5, and 7
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
FAN CLTCH (EV) and ODD IGN/INJ Fuses
G102, G110 and G120
Ignition Controls - Ignition System Coils 2, 4, 6, and 8
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, EVEN IGN/INJ, FUEL HTR, and V6 FUEL INJ Fuses
G102, G110 and G120
Ignition Controls - CKP, CMP and Knock Sensors
Fuel Controls - Fuel Pump Controls (LMF)
AIRBAG, BRK SW, ECM IGN/GLOW PLUG MDL IGN, FCSM IGN, IPC, STR/WHL/SNSR, TCM IGN, and TRANS Fuses
AIRBAG, BRK SW, ECM IGN/GLOW PLUG MDL IGN, FCSM IGN, IPC, STR/WHL/SNSR, TCM IGN, and TRANS Fuses
CNSTR VENT SOL, ECM BATT, FCSM BATT, and WPR Fuses
G300, G301, G304, and G305
Fuel Controls - Fuel Pump Controls (L20 or L96)
A/C CMPRSR, ABS MDL, ABS MTR, DIESEL FUEL PUMP, GAS FUEL PUMP, HORN, and WASH Fuses
Gauges (L20, L96, LMF or LU3)
G350 and G400
G102, G110 and G120
Fuel Controls - Compressed Natural Gas (LC8 with FHZ)
A/C CMPRSR, ABS MDL, ABS MTR, DIESEL FUEL PUMP, GAS FUEL PUMP, HORN, and WASH Fuses
Gauges (L20, L96, LMF or LU3)
G102, G110 and G120
G350 and G400
Fuel Controls - LPG Fuel Controls (KO7 with UFM)
A/C CMPRSR, ABS MDL, ABS MTR, DIESEL FUEL PUMP, GAS FUEL PUMP, HORN, and WASH Fuses
B+ Bus - Underhood Fuse Block (1 of 2)
Link target Object 2636434 does not exist in this publication.
G102, G110 and G120
G350 and G400
Fuel Controls - LPG Bypass Solenoid (KO7 with UFM)
B+ Bus - Underhood Fuse Block (1 of 2)
Fuel Controls - Liquefied Petroleum Gas (KO7 with UFP) 1 of 2
LPG EVAP System (KO7 with UFM)
Electrical Center Identification Views
A/C CMPRSR, ABS MDL, ABS MTR, DIESEL FUEL PUMP, GAS FUEL PUMP, HORN, and WASH Fuses
B+ Bus - Underhood Fuse Block (1 of 2)
Gauges (L20, L96, LMF or LU3)
G102, G110 and G120
Fuel Controls - Liquefied Petroleum Gas (KO7 with UFP) 2 of 2
G350 and G400
Fuel Controls - Fuel Injectors (LMF, L20, L96, or LC8 with KO7 and UFP)
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
FAN CLTCH (EV) and ODD IGN/INJ Fuses
ECM PWR/TRN, EVEN IGN/INJ, FUEL HTR, and V6 FUEL INJ Fuses
Fuel Controls - Fuel Injectors (FHZ, or KO7 with UFM)
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
FAN CLTCH (EV) and ODD IGN/INJ Fuses
ECM PWR/TRN, EVEN IGN/INJ, FUEL HTR, and V6 FUEL INJ Fuses
Fuel Controls - EVAP Controls
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
ECM PWR/TRN, MAF/CNSTR VENT, O2 SNSR 1 (PRE)/CLS, and O2 SNSR 2 (POST) Fuses
CNSTR VENT SOL, ECM BATT, FCSM BATT, and WPR Fuses
Gauges (L20, L96, LMF or LU3)
Controlled/Monitored Subsystem References
Compressor Controls (C60)
Stop Lamp Controls and CHMSL
Module Power, Ground and Serial Data
Module Power, Ground, Data Communication, MIL, and Stop Lamp Signal (L20 or L96)
Charging System (Gas)
Starting System (Gas)
PNP and VSS Signals, Pressure and Temperature Controls
IMS, Tow/Haul, and Tap Up/Tap Down Switches
Gauges (L20, L96, LMF or LU3)
Power, Ground, Serial Data, Speed Signals and Indicators (JL9 or JH9)
Speed Signals (JL4)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.