Chevrolet Chevy Express G3500 2008 - 2008 ELECTRICAL Fuses & Circuit Breakers - Chevy Express & Savana

Chevrolet Chevy Express G3500 2008 - IDENTIFICATION

CAUTION:

When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See PROGRAMMING AND SETUP article in GENERAL INFORMATION before disconnecting battery.

Chevrolet Chevy Express G3500 2008 - FUSIBLE LINKS

Fusible links are usually located between battery and starter or electrical center. For description and repair procedures, see Fig. 1.

Fig. 1: Chevrolet Chevy Express G3500 2008 - Component Locations - Repairing Fusible Links

Chevrolet Chevy Express G3500 2008 - BODY FUSE BLOCK

NOTE:

The body fuse block is located under the driver's seat.

Fig. 2: Chevrolet Chevy Express G3500 2008 - Component Locations - Identifying Body Fuse Block

Chevrolet Chevy Express G3500 2008 Fuse Block - Body

No.	Device	Rating	Description
1	HVAC 2 Fuse	10A	Air Temperature Actuator, HVAC Control Assembly (C49/DE5/DE7), HVAC Control Processor - Auxiliary, HVAC Control Assembly-Rear Auxiliary (C69 +Rear Auxiliary Controls), Low Speed Blower Motor Relay - Auxiliary (C36/C69), Med Speed Blower Motor Relay - Auxiliary (C36/C69), High Speed Blower Motor Relay - Auxiliary (C36/C69), Mode Actuator - Auxiliary (C69) and Air Temperature Actuator - Auxiliary (C69)
2	CMPS Fuse	10A	Electroinc Compass Module
3	IGN SW/PK3 MDL Fuse	2A	Ignition Switch and Theft Deterrent Control Module
4	UPFTR CTSY LMPS Fuse	15A	Body Control Module (-YF7), X405 (Cutaway), Courtesy/Reading Lamp- Middle (Passenger), Dome Lamp Rear (Cargo), Courtesy/Reading Lamp - Rear (Passenger), X320 (YF7) and Courtesy/Reading Lamp Front
5	HVAC 1 Fuse	20A	HVAC Control Assembly and Vacuum Pump - Diesel
6	EMPTY	-	Not Used
7	IP CLSTR Fuse	10A	Instrument Panel Cluster
8	RDO/CHIME Fuse	15A	Radio, Chime Module
9	AUX PRK LAMP Fuse	15A	X405 (Cutaway)
10	AUX/TRLR BCK/UP Fuse	10A	Backup Alarm (8S3), Trailer Connector (UY7) and X405 (Cutaway)
11	RFA/TPM Fuse	10A	Remote Control Door Lock Receiver (RCDLR) (AUO)
12	HVAC CNTRL Fuse	10A	HVAC Control Assembly (DE5/DE7/C49)
13	TRLR PRK LAMP Fuse	15A	Trailer Connector (UY7)
14	FRT PRK LAMP Fuse	10A	Park/Turn Signal Lamp - LF, Marker Lamp - LF, Park/Turn Signal Lamp -RF, Marker Lamp -RF and Inflatable Restraint I/P Module Disable Switch (C99)
15	T/LAMP BCK/UP Fuse	10A	Backup Lamp - Right (Passenger/Cargo) and Backup Lamp - Left (Passenger/Cargo)
16	EMPTY	-	Not Used
17	STR WHL SNSR Fuse	2A	Inflatable Restraint Steering Wheel Module Coil (K34/W1Y),
18	OSRVM SW Fuse	2A	Outside Rearview Mirror Switch (DE5/DE7)
19	EMPTY	-	Not Used
20	EMPTY	-	Not Used
21	REAR DEFOG Fuse	30A	Rear Window Defogger Grid - Left (C49) and Rear Window Defogger Grid - Right (C49)
22	OSRVW HTR Fuse	20A	Outside Rearview Mirror - Driver (DE5/DE7) and Outside Rearview Mirror - Passenger (DE5/DE7)
23	EMPTY	-	Not Used
24	EMPTY	-	Not Used
25	CARGO DR UNLCK Fuse	15A	Door Latch Assembly - Cargo (Passenger/Cargo +AU3)
26	REAR DR LCK Fuse	15A	Door Contact Plate - Left Side (E26), Door Contact Plate - Right Side (E24/YA2) and Door Latch Assembly - Cargo (Passenger/Cargo)
27	FRT DR LCK Fuse	15A	Door Latch Assembly - Driver (AU3) and Door Latch Assembly - Passenger (AU3)
28	REAR PASS DR UNLCK Fuse	15A	Door Contact Plate - Left Side (E26/AU3), Door Contact Plate - Right Side (Passenger/Cargo +AU3) and Fuse Block - Body
29	UPFTR PARK LAMPS Fuse	10A	X320 (YF2/YF7)
30	FRT PASS DR UNLCK Fuse	15A	Door Latch Assembly - Passenger (AU3)
31	DRV DR UNLCK Fuse	15A	Door Latch Assembly - Driver (AU3)
32	AIRBAG/AOS Fuse	10A	Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Vehicle Rollover Sensor (ASF) and Inflatable Restraint Front Passenger Presence System (PPS) Sensor (-YF7 +Light Duty )
33	RT REAR PRK LAMP Fuse	10A	Tail/Stop and Turn Signal Lamp - Right (Passenger/Cargo)
34	LT REAR PRK LAMP Fuse	10A	Tail/Stop and Turn Signal Lamp - Left (Passenger/Cargo) and, License Lamp (Passenger/Cargo)
35	UPFTR AUX 2 Fuse	50A	Blunt Cut (YF1), X321 (YF2/YF7) and X222 (YF2/YF7)
36	UPFTR AUX 1 Fuse	50A	Blunt Cut (YF1), X321 (YF2/YF7) and X222 (YF2/YF7)
37	REAR BLWR Fuse	30A	Low Speed Blower Motor Relay - Auxiliary (C36/C69), Medium Speed Blower Motor Relay - Auxiliary (C36/C69) and High Speed Blower Motor Relay - Auxiliary (C36/C69)
38	EMPTY	-	Not Used
39	RUN Relay	-	HVAC 1, HVAC 2, CMPS Fuses and UPFTR AUX 2 Relay
40	PRK LAMP Relay	-	LT REAR PRK LAMP, RT REAR PRK LAMP, FRT PRK LAMP, TRLR PRK LAMP, AUX PRK LAMP and UPFTR PARK LMPS Fuses
41	EMPTY	-	Not Used
42	UPFTR AUX 2 Relay	-	UPFTR AUX 2 Fuse
43	RAP Relay	-	PWR WDO Circuit Breaker
44	REAR DEFOG Relay	-	REAR DEFOG and OSRVM HTR Fuses
45	PWR WDO Circuit Breaker	25A	Window Switch - Driver (A31) and Window Switch - Passenger (A31)
46	PWR SEATS Circuit Braker	30A	Seat Adjuster Switch - Driver (AG1) and Seat Adjuster Switch - Passenger (AG1)
IMPORTANT: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.
-	UPFITTER CTSY LAMPS PCB Relay	-	UPFTR CTSY LMPS Fuses
-	DRV UNLOCK PCB Relay	-	DRV DR UNLCK Fuse
-	PASS/CGO UNLOCK PCB Relay	-	FRT PASS DR UNLCK and REAR PASS DR UNLCK Fuses
-	CGO UNLOCK PCB Relay	-	CARGO DR UNLCK Fuse
-	ALL DRS LOCK PCB Relay	-	FRT DR LCK and REAR DR LCK Fuses
-	BACK UP LAMP PCB Relay	-	AUX/TRLR BCK/UP and T/LAMP BCK UP Fuses

Chevrolet Chevy Express G3500 2008 - UNDERHOOD FUSE BLOCK

NOTE:

The Underhood fuse block is in the engine compartment, attached to left front fender.

Fig. 3: Chevrolet Chevy Express G3500 2008 - Component Locations - Identifying Underhood Fuse Block

Chevrolet Chevy Express G3500 2008 Fuse Block - Underhood

No.	Device	Rating	Description
1	LT HI BEAM Fuse	10A	Headlamp-High Beam-Left (Composite) or Headlamp-Left (Sealed)
2	FUEL PUMP Fuse	20A	Fuel Pump and Sender Assembly (4.3L, 4.8L, 6.0L) or Fuel Pump (6.6L)
3	EMPTY	-	Not Used
4	FUEL HTR (D) Fuse	15A	Fuel Heater (6.6L)
5	RT HI BEAM Fuse	10A	Headlamp-High Beam-Right (Composite) or Headlamp-Right (Sealed)
6	EMPTY	-	Not Used
7	LT LO BEAM Fuse	10A	Headlamp-Low Beam-Left (Composite) or Headlamp-Left (Sealed)
8	RT STP/TRN TRLR Fuse	15A	Trailer Connector
9	RT LO BEAM Fuse	10A	Headlamp-Low Beam-Right (Composite) or Headlamp-Right (Sealed)
10	DRL 2 Fuse	10A	LT LO BEAM fuse and Headlamp-Left (Sealed)
11	FCSM IGN (G) Fuse	10A	Fuel System Control Module (5.3L)
12	DRL 1 Fuse	15A	LT LO BEAM fuse and Headlamp-Low Beam-Left (Composite)
13	AUX STOP LAMP Fuse	15A	X405 (Cutaway)
14	FOH MDL (D) Fuse	15A	Coolant Heater (6.6L)
15	FCSM BATT (G) Fuse	20A	Fuel System Control Module (5.3L)
16	LT STP/TRN TRLR Fuse	15A	Trailer Connector
17	CNSTR VENT SOL (G) Fuse	10A	Evaporative Emission (EVAP) Canister Vent Solenoid Valve (Gas)
18	EMPTY	-	Not Used
19	EMPTY	-	Not Used
20	BCM 1 Fuse	10A	Body Control Module
21	SEO Fuse	10A	Instrument Panel Cluster (8S8)
22	BCM 4 Fuse	15A	Body Control Module
23	BCM 6 Fuse	15A	Body Control Module
24	EMPTY	-	Not Used
25	BCM 7 Fuse	10A	Body Control Module
26	BCM 3 Fuse	15A	Body Control Module
27	BCM 5 Fuse	15A	Body Control Module
28	EMPTY	-	Not Used
29	EMPTY	-	Not Used
30	IP CLSTR Fuse	10A	Instrument Panel Cluster
31	EMPTY	-	Not Used
32	BRK SW Fuse	10A	Stop Lamp Switch
33	AUX PWR OUTLET Fuse	20A	Auxiliary Power Outlet 2
34	AIRBAG Fuse	10A	Inflatable Restraint Sensing and Diagnostic Module, Inflatable Restraint I/P Module Disable Switch (C99) or Inflatable Restraint PASSENGER AIR BAG ON/OFF Indicator (-C99)
35	TRLR WRG Fuse	30A	Blunt Cut (UY7)
36	STR/WHL SNSR (G) Fuse	10A	Steering Wheel Speed/Position Sensor (JL4)
37	BCM 2 Fuse	10A	Body Control Module
38	LTR/DLC Fuse	20A	Cigar Lighter (DT4), Auxillary Power Outlet 1 (-DT4) and Data Link Connector (DLC)
39	WPR Fuse	25A	WPR Relay
40	EMPTY	-	Not Used
41	WSW Fuse	15A	Windshield Washer Fluid Pump
42	EMPTY	-	Not Used
43	HORN Fuse	20A	Horn Assembly
44	TCM BATT Fuse	10A	Transmission Control Module
45	EMPTY	-	Not Used
46	O2 SNSR 1 (G) Fuse	10A	HO2S Bank 1 Sensor 1 (Gas) and HO2S Bank 2 Sensor 1 (Gas)
47	TCM IGN Fuse	15A	Transmission Control Module
48	ECM IGN Fuse	15A	Engine Control Module
49	MAF/CNSTR VENT Fuse	15A	Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor and Evaporative Emission (EVAP) Canister Purge Solenoid Valve (Gas)
50	ECM PWR/TRN Fuse	10A	Engine Control Module
51	TRANS Fuse	15A	Automatic Transmission
52	EVEN IGN/INJ (G) Fuse	20A	Even Ignition Coils (4.8L, 5.3L, 6.0L) and Even Fuel Injector (4.8L, 5.3L, 6.0L)
53	GLOW PLUG MDL (D) Fuse	10A	Glow Plug Control Module (GPCM) (6.6L)
54	ECM BATT (G) Fuse	10A	Engine Control Module
55	ODD IGN/INJ (G) Fuse	20A	Odd Ignition Coils (4.8L, 5.3L, 6.0L), Ignition Control Module (4.3L) and Odd Fuel Injectors (4.8L, 5.3L, 6.0L)
56	O2 SNSR 2 (G) Fuse	10A	HO2S Bank 1 Sensor 2 (Gas) and HO2S Bank 2 Sensor 2 (Gas)
57	A/C CMPRSR Fuse	15A	A/C Compressor Clutch (C60)
58	FAN CLTCH (D) Fuse	10A	FAN CLTCH Relay (D) (6.6L)
59	V6 FUEL INJ (G) Fuse	15A	Fuel Injectors (4.3L)
60	ABS MDL Fuse	40A	Electronic Brake Control Module (EBCM)
61	ABS MTR Fuse	60A	Electronic Brake Control Module (EBCM)
62	TRLR WRG Fuse	30A	Trailer Connector
63	SPARE Fuse	-	Not Used
64	STRTR SOL Fuse	40A	Starter Motor
65	ECM PWR/TRN (D) Fuse	30A	Engine Control Module (6.6L)
66	FRT BLWR Fuse	40A	Blower Motor Resistor Assembly
67	SPARE Fuse	-	Not Used
68	SPARE Relay	-	Not Used
69	RUN/CRNK Relay	-	FCSM IGN (5.3L), IP CLSTR, TRANS, BRK SW, TCM IGN, ECM IGN, AIR BAG, STR/WHL SNSR (G), STRTR SOL Fuses
70	WPR - HI Relay	-	Windshield Wiper Motor
71	WPR Relay	-	WPR - HI Relay and Windshield Wiper Motor
72	FUEL PUMP Relay	-	FUEL PUMP Fuse
73	CRNK Relay	-	STRTR SOL Fuse
74	A/C CMPRSR Relay	-	A/C CMPRSR Fuse
75	FAN CLTCH (D) Relay	-	Cooling Fan (6.6L) and Engine Control Module (6.6L)
76	PWR/TRN Relay	-	GLOW PLUG MDL (D), FUEL HTR (D), O2 SNSR 1 (G), O2 SNSR 2 (G), ECM PWR/TRN, MAF/CNSTR VENT, V6 FUEL INJ (G), EVEN IGN/INJ (G), ODD IGN/INJ (G), ECM PWR/TRN (D) and FAN CLTCH (D) Fuses
IMPORTANT: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.
-	HIGH BEAM PCB Relay	-	LT HIGH BEAM and RT HIGH BEAM Fuses
-	LOW BEAM PCB Relay	-	LT LO BEAM and RT LO BEAM Fuses
-	DRL PCB Relay	-	DRL 1 and DRL 2 Fuses
-	TRAILER LH STOP/TURN PCB Relay	-	LT STP/TRN TRLR Fuse
-	TRAILER RH STOP/TURN PCB Relay	-	RT STP/TRN TRLR Fuse
-	WASHER PCB Relay	-	WSW Fuse
-	HORN PCB Relay	-	HORN Fuse
-	STOP LAMPS PCB Relay	-	AUX STOP LAMP Fuse