Chevrolet Avalanche 2008 - 2008 ELECTRICAL Fuses & Circuit Breakers - Avalanche, Escalade, Suburban, Tahoe & Yukon

Chevrolet Avalanche 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 Avalanche 2008 - FUSIBLE LINKS

For information on fusible links and repairing them, refer to illustration. See Fig. 1.

Fig. 1: Chevrolet Avalanche 2008 - Component Locations - Repairing Fusible Links

Chevrolet Avalanche 2008 - AUXILIARY FUSE BLOCK (HP2)

NOTE:

Auxiliary fuse box (HP2) is located on left side of engine compartment.

Fig. 2: Chevrolet Avalanche 2008 - Component Locations - Identifying Auxiliary Fuse Block (HP2) Components

Chevrolet Avalanche 2008 Fuse Block - Auxiliary (HP2)

No.	Device	Rating	Description
1	ACPO Fuse	25A	Accessory Power Inverter Module
2	BECM FAN Fuse	15A	Generator Battery Vent Fan Relay
3	ACCM Fuse	15A	A/C Compressor
4	CAB HTR PUMP Fuse	10A	Heater Coolant Pump
5	EMPTY	-	Not Used
6	COOL PUMP Fuse	15A	Generator Control Module Coolant Pump - Left, Generator Control Module Coolant Pump - Right
7	EPS Fuse	15A	Electronic Power Steering Motor Control Module
8	PIM 1 Fuse	15A	Drive Motor Generator Power Inverter Module
9	PIM 2 Fuse	2A	Drive Motor Generator Power Inverter Module
10	BECM Fuse	15A	Drive Motor Generator Battery Control Module, Serial Data Gateway (SDG) Module
-	FAN 1Fuse	40A	FAN LO Relay, FAN MID 1 Relay
-	FAN 2 Fuse	40A	FAN HI Relay, FAN MID 2 Relay
-	TRANS PUMP Fuse	60A	Auxiliary Transmission Pump Control Module
-	CAB HTR PUMP Relay	-	CAB HTR PUMP Fuse, Heater Coolant Pump
-	COOL PUMP Relay	-	COOL PUMP Fuse, Generator Control Module Coolant Pump - Left, Generator Control Module Coolant Pump - Right
-	FAN LO Relay	-	Cooling Fan - Left
-	FAN MID 1 Relay	-	Engine Cooling Fan Resistor - Left
-	FAN MID 2 Relay	-	Cooling Fan - Right
-	FAN HI Relay	-	Cooling Fan - Right
-	FAN CNTRL Relay	-	Cooling Fan - Left

Chevrolet Avalanche 2008 - INSTRUMENT PANEL FUSE BLOCK

NOTE:

Instrument Panel (I/P) fuse block is located at the left side of the I/P behind the access panel.

Fig. 3: Chevrolet Avalanche 2008 - Component Locations - Identifying Instrument Panel Fuse Block Components

Chevrolet Avalanche 2008 Fuse Block - I/P

Device	Rating	Description
AUX PWR Fuse	20A	Accessory Power Outlet - Center Console Compartment (D07), Accessory Power Outlet - Center Console (D07), Accessory Power Outlet - I/P 2 (X88/Z88)
AUX PWR2 Fuse	20A	Auxiliary Power Outlet - Rear (E52), Auxiliary Power Outlet - Center Seat (AZ3 or A95)
BCM Fuse	10A	Body Control Module (BCM)
COOLED SEATS Fuse	30A	Climate Control Seat Module (KB6)
CTSY Fuse	15A	Body Control Module (BCM)
DDM Fuse	15A	Driver Door Module (DDM)
DIM Fuse	10A	Body Control Module (BCM)
DSM Fuse	10A	Memory Seat Module (AN3), Remote Control Door Lock Receiver (RCDLR)
INFO Fuse	10A	Vehicle Communication Interface Module (VCIM)
IS LAMPS Fuse	10A	Body Control Module (BCM)
LCK1 Fuse	15A	Door Latch Assembly - Left Rear, Door Latch Assembly - Right Rear
LCK2 Fuse	15A	Endgate Lock Actuator
LT DR Circuit Breaker	25A	Driver Door Module (DDM), Window Switch - Left Rear
LT STOP TRN Fuse	15A	Body Control Module (BCM)
OBS DET Fuse	10A	Liftgate Module (LGM) (E61), Rear Object Sensor Control Module (UD7)
PDM Fuse	15A	Garage Door Opener (GDO) (UG1), Inside Rearview Mirror (ISRVM), Passenger Door Module (PDM), Roof Beacon Switch (5G4)
REAR HVAC Fuse	30A	Blower Motor Control Module - Auxiliary
REAR SEAT Fuse	20A	Folding Seat Motor - Left Rear (ARS), Folding Seat Motor - Right Rear (ARS), Heated Seat Module - Rear (KA6)
REAR SEAT ENT Fuse	5A	Video Display - Front (U42), Video Display - Rear (U42 with DNU)
REAR WPR Fuse	25A	Rear Window Wiper Motor (E52)
RT STOP TRN Fuse	15A	Body Control Module (BCM)
STOP LAMPS Fuse	15A	Body Control Module (BCM)
SWC BKLT Fuse	2A	Steering Wheel Control Switch - Left, Steering Wheel Control Switch - Right
UNLCK1 Fuse	15A	Door Latch Assembly - Left Rear, Door Latch Assembly - Right Rear
UNLCK2 Fuse	15A	Endgate Lock Actuator
IMPORTANT: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.
LOCK/UNLOCK PCB Relay	-	LCK 1 Fuse, LCK 2 Fuse, UNLCK 1 Fuse, UNLCK 2 Fuse

Chevrolet Avalanche 2008 - INSTRUMENT PANEL LEFT JUNCTION BLOCK

NOTE:

Instrument panel left junction block is located below the instrument panel to the left of the steering column on floor board near park brake.

Fig. 4: Chevrolet Avalanche 2008 - Component Locations - Identifying Instrument Panel Relay Block Components

Chevrolet Avalanche 2008 Junction Block - Left I/P Label Usage

Device	Rating	Description
DRIVER SEAT 2 Circuit Breaker	25A	Memory Seat Module (AN3), Seat Adjuster Switch - Driver (AG1 without AN3)
PASS SEAT 1 Circuit Breaker	25A	Seat Adjuster Switch - Passenger, Seat Lumbar Switch - Passenger (AN3)
PWR REAR WNDW Circuit Breaker	25A	Not Used
RT DOORS Circuit Breaker	25A	Door Lock/Window Switch - Passenger, Window Switch - Right Rear
IMPORTANT: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.
PARK ENABLE PCB Relay	-	Folding Seat Switch - Front (ARS), Folding Seat Switch - Left Rear (ARS), Folding Seat Switch - Right Rear (ARS), Multifunction Switch - I/P
ELECTRONIC ADJUSTABLE PEDALS Relay	-	Electronic Adjustable Pedal (EAP) Assembly (JF4 without AN3)

Chevrolet Avalanche 2008 - UNDERHOOD FUSE BLOCK

NOTE:

Underhood fuse block is located at the left side of the engine compartment to the rear of the battery.

Fig. 5: Chevrolet Avalanche 2008 - Component Locations - Identifying Underhood Fuse Block Components

Chevrolet Avalanche 2008 Fuse Block - Underhood

No.	Device	Rating	Description
1	TRLR STOP RT Fuse	10A	Trailer Wiring, Auxiliary Body Control Module (XBCM) (EXP)
2	ESC/ALC EXH Fuse	30A	Automatic Level Control (ALC) Compressor (G69), Electronic Suspension Control (ESC) Module (Z55)
3	TRLR STOP LT Fuse	10A	Trailer Wiring, Auxiliary Body Control Module (XBCM) (EXP)
4	ENG Fuse	15A	Evaporative Emissions (EVAP) Canister Purge Solenoid Valve, Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Valve Lifter Oil Manifold (VLOM) Assembly (AFM)
5	ECM/THROT CONT Fuse	15A	Engine Control Module (ECM)
6	ITBC Fuse	15A	Not Used
7	FRT WASH Fuse	15A	Windshield Washer Fluid Pump
8	O2-B SNSR Fuse	10A	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
9	ABS 2 Fuse	25A	Electronic Brake Control Module (EBCM)
10	TRLR BCK/UP Fuse	10A	Trailer Wiring
11	LO HDLP-LT Fuse	20A	Headlamp - Left (Z88), Headlamp - Low Beam - Left (X88), Headlamp Ballast - Left (Z75)
12	ECM-BATT Fuse	10A	Engine Control Module (ECM)
13	INJ-B Fuse	20A	Fuel Injector 2, Fuel Injector 4, Fuel Injector 6, Fuel Injector 8, Ignition Coil 2, Ignition Coil 4, Ignition Coil 6, Ignition Coil 8
14	TCM-BATT Fuse	15A	Evaporative Emissions (EVAP) Canister Vent Solenoid Valve, Transmission Control Module (TCM)
15	VEH BCK/UP Fuse	10A	Backup Lamp - Left, Backup Lamp - Right
16	LO HDLP-RT Fuse	20A	Headlamp - Right (Z88), Headlamp - Low Beam - Right (X88), Headlamp Ballast - Right (Z75)
17	A/C CMPRSR Fuse	10A	A/C Compressor Clutch
18	O2-A SNSR Fuse	10A	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
19	TRANS IGN 1 Fuse	15A	Transmission Control Module (TCM), 1-2 Shift Solenoid (1-2 SS) Valve, 2-3 Shift Solenoid (2-3 SS) Valve, 3-2 Shift Solenoid (3-2 SS) Valve (M30 or M70), Torque Converter Clutch (TCC) Solenoid Valve (M30 or M70), Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve
20	FUEL PUMP Fuse	20A	Fuel Pump and Sender Assembly - Primary
21	FSCM Fuse	20A	Fuel Pump Flow Control Module
22	HDLP WASH Fuse	20A	Not Used
23	REAR WASH Fuse	15A	Rear Window Washer Fluid Pump
24	INJ-A Fuse	20A	Fuel Injector 1, Fuel Injector 3, Fuel Injector 5, Fuel Injector 7, Ignition Coil 1, Ignition Coil 3, Ignition Coil 5, Ignition Coil 7
25	TRLR PRK Fuse	15A	Trailer Wiring
26	LT PRK Fuse	15A	License Lamp - Left, License Lamp - Right, Marker Lamp - Left Front, Park/Turn Signal Lamp - Left Front (X88/Z88), Park Lamp - Left Front (Z75), Tail Lamp Circuit Board - Left (Z75 with E52), Marker Lamp - Left Rear (except Z75 with E52), Tail/Stop and Turn Signal Lamp - Lower Left (except Z75 with E52), Tail/Stop and Turn Signal Lamp - Upper Left (except Z75 with E52)
27	RT PRK Fuse	15A	Tail Lamp Circuit Board - Right (Z75 with E52), Marker Lamp - Right Front, Park Lamp - Right Front (Z75), Park/Turn Signal Lamp - Right Front (X88 or Z88), Tail/Stop and Turn Signal Lamp - Lower Right (X88, Z88 or Z75 with E52), Tail/Stop and Turn Signal Lamp - Upper Right (X88, Z88 or Z75 with E52), Marker Lamp - Right Rear (X88, Z88 or Z75 with E52)
28	FOG LAMP Fuse	15A	Fog Lamp - Left Front (T96), Fog Lamp - Right Front (T96)
29	HORN Fuse	15A	Horn - Left, Horn - Right
30	HI HEADLAMP-RT Fuse	10A	Headlamp - Right (Z88), Headlamp - Right High Beam (X88 or Z75)
31	DRL Fuse	15A	Daytime Running Lamp (DRL) - Left (Z75 or X88), Daytime Running Lamp (DRL) - Right (Z75 or X88), DRL 2 Fuse (Z88)
32	HI HEADLAMP-LT Fuse	10A	Headlamp - Left (Z88), Headlamp - High Beam - Right (X88 or Z75)
33	DRL 2 Fuse	15A	LO HDLP - LT Fuse (Z88), LO HDLP - RT Fuse (Z88)
34	S/ROOF Fuse	30A	Sunroof Control Module (CF5), Roof Beacon Relay (5G4)
35	DLIS Fuse	2A	Ignition Switch, Theft Deterrent Module (TDM)
36	FRT WPR Fuse	25A	Wiper 1 PCB Relay
37	SEO B2 Fuse	30A	Not Used
38	EAP Fuse	15A	PARK ENABLE PCB Relay, ELECTRONIC ADJUSTABLE PEDALS PCB Relay, Folding Seat Switch - Front (ARS), Folding Seat Switch - Left Rear (ARS), Folding Seat Switch - Right Rear (ARS), Multifunction Switch - I/P, Police Provision Wiring (6J1)
39	HVAC BATT Fuse	10A	HVAC Control Module
40	AIRBAG IGN Fuse	10A	Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Passenger Air Bag ON/OFF Indicator
41	AMP Fuse	30A	Audio Amplifier (UQA or UQS)
42	RDO Fuse	15A	Clock (Z75), Digital Radio Receiver (U2K), Radio, Rear Seat Audio (RSA) Controller (UK6)
43	MISC IGN Fuse	10A	Auxiliary Body Control Module (XBCM) (EXP), Seat Climate Control Module (KB6), Stop Lamp Switch, Transfer Case Shift Control Module (NQH), Rearview Camera Image Display Module (UVC), Serial Data Gateway (SDG) Module (HP2)
44	L/GATE RELSE Fuse	15A	Liftgate Latch Assembly (E52)
45	AIRBAG BATT Fuse	15A	Inflatable Restraint Passenger Presence System (PPS) Module, Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Vehicle Rollover Sensor (ASF)
46	IPC Fuse	10A	Body Control Module (BCM), Instrument Panel Cluster (IPC)
47	EXP/PTO Fuse	15A	Auxiliary Body Control Module (XBCM) (EXP), Spot Lamp - Left (7X6)
48	AUX HVAC-IGN Fuse	10A	Instrument Panel Cluster (IPC), Inside Rearview Mirror (ISRVM), Mode Actuator - Auxiliary (C69), Air Temperature Actuator - Auxiliary (C69), Inflatable Restraint Steering Wheel Module Coil (KA9), Heated Steering Wheel Control Module (KA9)
49	CHMSL Fuse	15A	Not Used
50	REAR DEFOG Fuse	30A	Rear Window Defogger Grid
51	HTD MIR Fuse	15A	Not Used
52	SEO B1 Fuse	15A	Auxiliary Body Control Module (XBCM) (EXP), Spot Lamp - Right (7X7), Vehicle Inclination Sensor (SPO Alarm), Security Indicator Lamp (SPO Alarm), Vehicle Shock Sensor (SPO Alarm)
53	LTR Fuse	20A	Accessory Power Outlet - I/P 1, Data Link Connector (DLC)
54	SEO/ALC Fuse	10A	Automatic Level Control (ALC) Relay (G69), Digital Video Disc (DVD) Control Module (SPO Accessory - Headrest DVD)
55	HVAC-IGN Fuse	10A	Air Temperature Actuator - Left, Air Temperature Actuator - Right, Mode Actuator, Recirculation Actuator
56	ECM-IGN Fuse	15A	Engine Control Module (ECM), Fuel Pump Relay - Secondary (LY6), Fuel Pump Flow Control Module (except LY6), Electronic Brake Control Module (EBCM) (HP2)
57	FAN-1 Fuse	40A	FAN LO PCB Relay
58	ALC/COMP Fuse	40A	Automatic Level Control (ALC) Relay (G69)
59	HEAVY DUTY ABS Fuse	60A	Electronic Brake Control Module (EBCM)
60	FAN-2 Fuse	40A	FAN HI PCB Relay
61	ABS-1 Fuse	40A	Electronic Brake Control Module (EBCM)
62	STRTR Fuse	40A	Starter Motor
63	STUD-2 Fuse	30A	Blunt Cut Wire
64	LBEC1 Fuse	60A	AUX PWR 2 Fuse, REAR WPR Fuse, PDM Fuse, AUX PWR Fuse
65	ELEC RUN BOARD Fuse	30A	Assist Step Control Module (BRS)
66	WSW/HTR Fuse	60A	Windshield Washer Solvent Heater (XA7)
67	TREC Fuse	30A	Transfer Case Encoder Motor (NQH), Transfer Case Shift Control Module (NQH)
68	STUD-1 Fuse	40A	Trailer Wiring
69	MBEC1 Fuse	60A	DRIVER SEAT 2 Circuit Breaker, PASS SEAT 1 Circuit Breaker, RT DOORS Circuit Breaker
70	HVAC BLWR Fuse	40A	Blower Motor Control Module
71	LGM Fuse	30A	Liftgate Module (LGM) (E61)
72	LBEC2 Fuse	60A	BCM Fuse, COOLED SEATS Fuse, DDM Fuse, DIM Fuse, DSM Fuse, REAR HVAC Fuse, RT STOP TRN Fuse, WSW PUMP Fuse
-	A/C CMPRSR Relay	-	A/C CMPRSR Fuse
-	FAN CNTRL Relay	-	FOG LAMP Fuse
-	FAN HI Relay	-	Cooling Fan - Right, FAN CNTRL Relay
-	FAN LO Relay	-	Cooling Fan - Left
-	FOG LAMP Relay	-	FOG LAMP Fuse
-	FUEL PMP Relay	-	FUEL PUMP Fuse
-	HDLP LO/HID Relay	-	LO HDLP - LT Fuse, LO HDLP - RT Fuse, DRL 2 Fuse
-	PRK LAMP Relay	-	LT PRK Fuse, RT PRK Fuse, TRLR PRK Fuse
-	PWR/TRN Relay	-	ECM/THROT CONT Fuse, ENG Fuse, INJ-A Fuse, INJ-B Fuse, O2-A SNSR Fuse, O2-B SNSR Fuse, FAN CNRTL Relay, FAN HI Relay, FAN LO Relay
-	REAR DEFOG Relay	-	REAR DEFOG Fuse, HTD MIR Fuse
-	RUN/CRNK Relay	-	AIRBAG IGN Fuse, AUX HVAC-IGN Fuse, HVAC-IGN Fuse, ECM-IGN Fuse, MISC IGN Fuse, SEO/ALC Fuse, TRANS IGN 1 Fuse
-	STRTR Relay	-	STRTR Fuse
IMPORTANT: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.
-	BCK/UP LAMP PCB Relay	-	VEH BCK/UP Fuse, TRLR BCK/UP Fuse
-	DRL PCB Relay	-	DRL Fuse
-	FAN CNTRL PCB Relay	-	Cooling Fan - Right
-	FRT WASH PCB Relay	-	FRT WASH Fuse
-	HI BEAM PCB Relay	-	HI HEADLAMP - LT Fuse, HI HEADLAMP - RT Fuse
-	HORN PCB Relay	-	HORN Fuse
-	L/GATE PCB Relay	-	L/GATE RELSE Fuse
-	REAR WASH PCB Relay	-	REAR WASH Fuse
-	RUN PCB Relay	-	FWD Fuse, HTD STR/WHL Fuse
-	TRLR STOP LT PCB Relay	-	TRLR STOP LT Fuse
-	TRLR STOP RT PCB Relay	-	TRLR STOP RT Fuse
-	WIPER 1 PCB Relay	-	Wiper 2 PCB Relay
-	WIPER 2 PCB Relay	-	Windshield Wiper Motor
IMPORTANT: Items listed below are wiper system diagnostic test points.
-	TP 92	-	Wiper High Speed Test Point
-	TP 95	-	Wiper Low Speed Test Point