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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 802 (WIRING SYSTEMS (GENERAL INFORMATION))COMPONENT LOCATORELECTRICAL CENTER IDENTIFICATION VIEWSUNDERHOOD FUSE BLOCK BOTTOM VIEW

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Underhood Fuse Block Bottom View

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Underhood Fuse Block Bottom View

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Underhood Fuse Block Bottom View

Courtesy of GENERAL MOTORS CORP.

Fuse Block - Underhood C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15328983 68-Way F Metri-Pack 280 Series Flexlock (L-GY)
Pin	Wire Color	Circuit Number	Function
A1	-	-	Not Used
A2	L-BU	409	Cooling Fan Motor Supply Voltage
A3	-	-	Not Used
A4	PK	1200	Headlamp High Beam Signal
A5	-	-	Not Used
A6	BK	150	Ground
A7	-	-	Not Used
A8	RD	228	Windshield Washer Pump Control
A9	BN	9	Park Lamp Supply Voltage
A10	GY	532	Cooling Fan Motor Supply Voltage
A11-B2	-	-	Not Used
B3	D-GN	29	Horn Control
B4	PK	1200	Headlamp High Beam Signal
B5	OG	740	Battery Positive Voltage
B6	D-BU	15	Right Turn Signal Lamps Supply Voltage
B7-B8	-	-	Not Used
B9	BN	9	Park Lamp Supply Voltage
B10-B12	-	-	Not Used
C1	D-GN	392	Rear Window Washer Switch Signal
C2	L-BU	409	Cooling Fan Motor Supply Voltage
C3	L-BU	14	Left Turn Signal Lamps Supply Voltage
C4	-	-	Not Used
C5	OG	740	Battery Positive Voltage
C8	-	-	Not Used
C9	BN	9	Park Lamp Supply Voltage
C10-D2	-	-	Not Used
D3	D-BU	1201	Headlamp Low Beam Signal
D4-D5	-	-	Not Used
D8	-	-	Not Used
D9	BN	9	Park Lamp Supply Voltage
D10-E1	-	-	Not Used
E2	PU	34	Fog Lamps Supply Voltage
E3	D-BU	1201	Headlamp Low Beam Signal
E4-E7	-	-	Not Used
E8	OG	640	Battery Positive Voltage
E9-F1	-	-	Not Used
F2	PU	34	Fog Lamps Supply Voltage
F3	-	-	Not Used
F4	GY	589	DRL Resistor Supply Voltage
F5-F8	-	-	Not Used
F9	OG	640	Battery Positive Voltage
F10-F12	-	-	Not Used

Fuse Block - Underhood C2 (L61)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15328985 68-Way F Metri-Pack 280 Series Flexlock (GY)
Pin	Wire Color	Circuit Number	Function
A1	BN/WH	2960	Keyword Serial Data
A1	BN/WH	2960	Keyword Serial Data
A2	-	-	Not Used
A3	BN	5069	Main Relay Control
A4	PU	6	Starter Solenoid Crank Voltage (M/T)
A4	YE	5	Crank Voltage (A/T)
A5	L-BU	20	Stop Lamp Switch Signal
A5	L-BU	20	Stop Lamp Switch Signal
A6	BK	150	Ground
A7	-	-	Not Used
A8	WH	5290	Ignition 1 Voltage
A9	PK	639	Ignition 1 Voltage
A10	D-GN/WH	465	Fuel Pump Relay
A11	GY	397	Cruise Control On Switch Signal
A12	L-GN	24	Backup Lamp Supply Voltage
B1-B3	-	-	Not Used
B4	D-BU	84	Cruise Control Set/Coast Switch Signal
B5	PU	1589	Fuel Level Sensor Signal
B6	PU	420	Brake Switch Signal
B7	GY/BK	87	Cruise Resume/Accel Switch Signal
B8	WH	5290	Ignition 1 Voltage
B9	PK	639	Ignition 1Voltage
B9	PK	639	Ignition 1Voltage
B10	PK	239	Ignition 1Voltage
B11	WH	1310	EVAP Canister Vent Solenoid Control
B12-C1	-	-	Not Used
C2	BK	2759	Low Reference
C3	-	-	Not Used
C4	WH	5291	Ignition 1 Voltage
C5-C12	-	-	Not Used
D1	OG	1440	Battery Positive Voltage
D2	D-GN	335	Low Speed Cooling Fan Relay Control
D3	-	-	Not Used
D4	WH	5291	Ignition 1 Voltage
D5-D8	-	-	Not Used
D9	PK	39	Ignition 1 Voltage
D10	PK	239	Ignition 1 Voltage
D11-D12	-	-	Not Used
E1	OG	1440	Battery Positive Voltage
E2	-	-	Not Used
E3	WH	5291	Ignition 1 Voltage
E4-E8	-	-	Not Used
E9	PK	39	Ignition 1 Voltage
E10	D-GN/WH	459	A/C Compressor Clutch Relay Control
E11	D-GN	59	A/C Compressor Clutch Supply Voltage
E12-F7	-	-	Not Used
F8	GY	2709	5 Volt Reference (Uplevel)
F9	PK	239	Ignition 1Voltage (Uplevel)
F10-F11	-	-	Not Used
F12	D-BU	473	High Speed Cooling Fan Relay Control

Fuse Block - Underhood C2 (L81)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15328985 68-Way F Metri-Pack 280 Series Flexlock (GY)
Pin	Wire Color	Circuit Number	Function
A1	WH	1310	EVAP Canister Vent Solenoid Control
A2	BN	5069	Main Relay Control
A3	-	-	Not Used
A4	YE	5	Crank Voltage
A5	L-BU	20	Stop Lamp Switch Signal
A5	L-BU	20	Stop Lamp Switch Signal
A6	BK	150	Ground
A7	-	-	Not Used
A8	WH	5292	Ignition 1 Voltage
A9	PK	39	Ignition 1 Voltage
A10	D-GN	465	Fuel Pump Relay Control
A11	PK	2014	Coolant Pump Relay Control (2002 w/L81)
A12	BN	2960	Keyword Serial Data
A12	BN	2960	Keyword Serial Data
B1	PK	239	Ignition 1 Voltage
B2-B5	-	-	Not Used
B6	PU	420	Brake Switch Signal
B7	BK	2759	Low Reference
B8	WH	5292	Ignition 1 Voltage
B9-B10	-	-	Not Used
B11	BK	2022	Coolant Pump Control (2002 w/L81)
B12-C1	-	-	Not Used
C2	L-GN	24	Backup Lamp Supply Voltage
C3	-	-	Not Used
C4	WH	5291	Ignition 1 Voltage
C4	WH	5291	Ignition 1 Voltage
C5	WH	5291	Ignition 1 Voltage
C6-C10	-	-	Not Used
C11	D-GN	459	A/C Compressor Clutch Relay Control
C12	-	-	Not Used
D1	OG	1440	Battery Positive Voltage
D2	D-GN	335	Low Speed Cooling Fan Relay Control
D3	-	-	Not Used
D4	WH	5291	Ignition 1 Voltage
D4	WH	5291	Ignition 1 Voltage
D5	WH	5291	Ignition 1 Voltage
D6-D7	-	-	Not Used
D8	WH	5290	Ignition 1 Voltage
D9	WH	5292	Ignition 1 Voltage
D9	WH	5292	Ignition 1 Voltage
D10	PK	39	Ignition 1 Voltage
D11-D12	-	-	Not Used
E1	OG	1440	Battery Positive Voltage
E2	-	-	Not Used
E3	WH	5291	Ignition 1 Voltage
E3	WH	5291	Ignition 1 Voltage
E4-E8	-	-	Not Used
E9	WH	5290	Ignition 1 Voltage
E10	-	-	Not Used
E11	D-GN	59	A/C Compressor Clutch Supply Voltage
E12-F7	-	-	Not Used
F8	PK	639	Ignition 1 Voltage
F8	PK	639	Ignition 1 Voltage
F9	WH	5290	Ignition 1 Voltage
F10	PK	639	Ignition 1 Voltage
F11	PK	639	Ignition 1 Voltage
F12	D-BU	473	High Speed Cooling Fan Relay Control

Fuse Block - Underhood C3 (L61)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15328984 68-Way F Metri-Pack 280 Flexlock Series (BK)
Pin	Wire Color	Circuit Number	Function
A1	L-GN	24	Backup Lamp Supply Voltage
A2	PU	293	Rear Defog Element Supply Voltage
A3	WH	193	Rear Defog Relay Control
A4	PK	1200	Right Headlamp High Beam Signal
A5	L-GN	24	Backup Lamp Supply Voltage
A5	L-GN	24	Backup Lamp Supply Voltage
A6	OG/BK	1445	Front Wiper Relay Control
A7	-	-	Not Used
A8	OG	540	Battery Positive Voltage
A9	-	-	Not Used
A10	YE	143	Accessory Voltage
A11	-	-	Not Used
A12	WH	1579	Oil Life Reset Switch Signal
B1	BK	28	Horn Switch Signal
B2	-	-	Not Used
B3	YE	196	Windshield Wiper Motor Park Switch Signal
B4	D-BU	84	Cruise Control Set/Coast Switch Signal
B5	-	-	Not Used
B6	PU	420	Brake Switch Signal
B7	OG	840	Battery Positive Voltage
B8-B9	-	-	Not Used
B10	L-BU	97	Windshield Wiper Switch Mist/Off/Low Signal
B11	WH	1310	EVAP Canister Vent Solenoid Control
B12	OG	140	Battery Positive Voltage
C1	D-GN	392	Rear Window Washer Switch Signal
C2-C3	-	-	Not Used
C4	RD	228	Windshield Washer Switch Signal
C5-C7	-	-	Not Used
C8	YE	343	Rear Wiper Switch Signal
C9	BN	9	Park Lamp Supply Voltage
C10	RD	2445	Rear Wiper Signal
C11	WH	393	Rear Wiper Switch Signal
C12	-	-	Not Used
D1	YE	18	Left Rear Stop/Turn Lamp Supply Voltage
D2	BK	2759	Low Reference
D2	BK	2759	Low Reference
D3	WH	5291	Ignition 1 Voltage
D4	PU	1589	Fuel Level Sensor Signal
D5	PK	1039	Ignition 1 Voltage
D6-D7	-	-	Not Used
D8	OG	580	Accessory Voltage
D9	PK	239	Ignition 1 Voltage
D10-D12	-	-	Not Used
E1	YE	317	Fog Lamp Relay Coil Supply Voltage
E2-E3	-	-	Not Used
E4	D-GN	19	Right Rear Stop/Turn Lamp Supply Voltage
E4	D-GN	19	Right Rear Stop/Turn Lamp Supply Voltage
E5	-	-	Not Used
E6	GY/BK	87	Cruise Control Resume/Accel Switch Signal
E7	PU	638	Power Window Motor Driver Down Control
E8-E10	-	-	Not Used
E11	GY	397	Cruise Control On Switch Signal
E12	-	-	Not Used
F1	BN/WH	2960	Keyword Serial Data
F2	D-BU	1201	Left Headlamp Low Beam Signal
F3	L-GN/BK	592	DRL Relay Control
F4	YE	5	Crank Voltage
F5	L-BU	20	Stop Lamp Switch Signal
F6	-	-	Not Used
F7	YE	743	Accessory Voltage
F8	YE	343	Accessory Voltage
F9	PK	3	Ignition 1 Voltage
F10	-	-	Not Used
F11	GY	120	Fuel Pump Supply Voltage
F12	OG	340	Battery Positive Voltage

Fuse Block - Underhood C3 (L81)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15328984 68-Way F Metri-Pack 280 Flexlock Series (BK)
Pin	Wire Color	Circuit Number	Function
A1	L-GN	24	Backup Lamp Supply Voltage
A2	PU	293	Rear Defog Element Supply Voltage
A3	WH	193	Rear Defog Relay Control
A4	YE	196	Windshield Wiper Motor Park Switch Signal
A5	WH	1579	Oil Life Reset Switch Signal
A6	WH	5291	Ignition 1 Voltage
A7	-	-	Not Used
A8	OG	540	Battery Positive Voltage
A9	-	-	Not Used
A10	YE	143	Accessory Voltage
A11	-	-	Not Used
A12	BN/WH	2960	Keyword Serial Data
B1	L-GN	24	Backup Lamp Supply Voltage
B2-B3	-	-	Not Used
B4	YE	317	Fog Lamp Relay Coil Supply Voltage
B5	PK	1200	Right Headlamp High Beam Signal
B6	PU	420	Brake Switch Signal
B7	OG	840	Battery Positive Voltage
B8-B9	-	-	Not Used
B10	L-BU	97	Windshield Wiper Switch Mist/Off/Low Signal
B11	OG/BK	1445	Front Wiper Relay Control
B12	OG	140	Battery Positive Voltage
C1-C3	-	-	Not Used
C4	D-GN	19	Right Rear Stop/Turn Lamp Supply Voltage
C5-C7	-	-	Not Used
C8	YE	343	Accessory Voltage
C9	RD	228	Windshield Washer Pump Control
C10	RD	2445	Rear Wiper Switch Signal
C11	WH	393	Rear Window Wiper Motor Control
C12	-	-	Not Used
D1	BK	28	Horn Relay Control
D2-D3	-	-	Not Used
D4	D-BU	1201	Left Headlamp Low Beam Signal
D5	PK	1039	Ignition 1 Voltage
D6-D7	-	-	Not Used
D8	OG	580	Accessory Voltage
D9	PK	239	Ignition 1 Voltage
D10	GY	120	Fuel Pump Supply Voltage
D11	-	-	Not Used
D12	OG	2340	Battery Positive Voltage
E1	D-GN	392	Rear Washer Switch Signal
E2-E3	-	-	Not Used
E4	YE	18	Left Rear Stop/Turn Lamp Supply Voltage
E5	-	-	Not Used
E6	BK	2759	Low Reference
E7	PU	638	Power Window Motor Driver Down Control
E8-E10	-	-	Not Used
E11	BN	9	Park Lamp Supply Voltage
E12	-	-	Not Used
F1	WH	1310	EVAP Canister Vent Solenoid Control
F2	-	-	Not Used
F3	L-GN/BK	592	DRL Relay Control
F4	YE	5	Crank Voltage
F5	L-BU	20	Stop Lamp Switch Signal
F6	-	-	Not Used
F7	YE	743	Accessory Voltage
F8	YE	343	Ignition 3 Voltage
F9	PK	3	Ignition 1Voltage
F10-F11	-	-	Not Used
F12	OG	340	Battery Positive Voltage

Fuse Block - Underhood C4

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15319799 2-Way F Maxi-Fuse (L-GN)
Pin	Wire Color	Circuit Number	Function
A	RD	9940	Battery Positive Voltage
B	OG	1140	Battery Positive Voltage

Fuse Block - Underhood C5

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15319797 2-Way F Maxi-Fuse (L-GY)
Pin	Wire Color	Circuit Number	Function
A	RD	702	Battery Positive Voltage
B	OG	40	Battery Positive Voltage
B	OG	40	Battery Positive Voltage

RENDER: 1.0x

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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.