Table of Contents
Most of the electrical power supply circuits in this American pickup are protected by fuses. High-current loads are connected via relays. These protective components are housed in the fuse and relay blocks located in the passenger compartment and the engine compartment.
This guide covers the fuse box diagrams for the second-generation Chevrolet Blazer (S-10 based; GMT330 platform) models from 1995 to 2005, as well as the GMC S-15 Jimmy and Envoy (1998–2000), and the Oldsmobile Bravada (1995–2001).
Engine Compartment Fuse Block
The fuse block is located on the driver's side, behind a plastic cover.
Remove the cover by turning the fastener counterclockwise. To reinstall the fuse block cover, push it in and turn the fastener clockwise.
| Diagram | ||
|---|---|---|
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| No. | Description | Amps |
| 1 | Except Envoy: Passenger Compartment Fuses “2”, “7”, “8”, “13”, “14”, “19” | 50 |
| Envoy: Passenger Compartment Fuses “2”, “7”, “8”, “13”, “14”, “19” | 60 | |
| 2 | Anti-lock Brake System (ABS) - Electronic Brake Control Module (EBCM) | 60 |
| 3 | - | - |
| 4 | - | - |
| 5 | Ignition Switch | 50 |
| 6 | Retained Accessory Power (RAP) Relay, “POWER SEATS” Circuit Breaker | 50 |
| 7 | Starter Relay, Ignition and Start Switch | 40 |
| 8 | Trailer Wiring Provision (Auxiliary Power) | 30 |
| 9 | Trailer Wiring Provision (Left Stop/Turn Signal) | 10 |
| 10 | Trailer Wiring Provision (Right Stop/Turn Signal) | 10 |
| 11 | Trailer Wiring Provision (Backup Lamps) | 10 |
| 12 | Left/Right Backup Lamps, Automatic Dimming Inside Rearview Mirror | 15 |
| 13 | Right Park/Turn Signal Lamp, Side Marker Lamp, Repeater Lamps | 10 |
| 14 | Left Park/Turn Signal Lamp, Side Marker Lamp, Repeater Lamp | 10 |
| 15 | Left Rear Park/Turn Signal Lamp | 10 |
| 16 | Right Rear Park/Turn Signal Lamp | 10 |
| 17 | Right Rear Park/Turn Signal Lamps (Domestic), Right Tail/Stop Lamp, License Plate Lamp | 10 |
| 18 | Left/Right Park/Turn Signal Lamps (Domestic), Side Marker Lamp, Headlamp Washer Pump Relay | 10 |
| 19 | License Plate Lamps, Trailer Wiring Provision (Park Lamps) | 10 |
| 20 | 1998: Left Low Beam Headlamp, Daytime Running Lamps (DRL) Relay | 10 |
| 1999–2005: Left Headlamp, Daytime Running Lamps (DRL) Relay | 15 | |
| Envoy (1999–2001): Left Low Beam (HID) | 20 | |
| 21 | 1998: Right Headlamp | 10 |
| 1999–2005: Right Headlamp | 15 | |
| Envoy (1999–2001): Right High Beam (HID) | 20 | |
| 22 | Evaporative Emission (EVAP) Canister Purge Solenoid, EVAP Canister Vent Solenoid, Mass Air Flow (MAF) Sensor, Camshaft Position (CMP) Sensor | 10 |
| 23 | Fuel Pump Relay, Powertrain Control Module (PCM), Fuel Pump, Engine Oil Pressure Sensor | 20 |
| 24 | Envoy (1998): Left High Beam (HID) | 15 |
| Envoy (1999–2001): Left High Beam (HID) | 10 | |
| 25 | 1999–2005: Headlamp Washer Pump Relay | 10 |
| Envoy (1998): Right High Beam (HID) | 15 | |
| Envoy (1999–2001): Right High Beam (HID) | 10 | |
| 26 | Horn | 15 |
| 27 | Ignition Control Module (ICM), Fuel Injectors, Powertrain Control Module (PCM), Ignition Coil, Crankshaft Position (CKP) Sensor | 15 |
| 28 | 1999–2005: A/C Compressor Relay | 10 |
| Envoy (1998): Daytime Running Lamps (DRL) | 15 | |
| 29 | Stop Lamp Switch, Transfer Case Shift Control Module, Automatic Transmission Shift Lock Control Actuator | 10 |
| 30 | Backup Lamp Switch, Park/Neutral Position (PNP) Switch | 25 |
| 31 | 1998: A/C Compressor Clutch Relay | 10 |
| 32 | A/C Compressor Relay, Secondary Air Injection (AIR) Relay (California Emissions), Rear Window Defogger Relay, Headlamp Leveling Switch, Left/Right Headlamp Leveling Actuator Motors, Automatic Level Control (ALC) Sensor and Compressor | 10 |
| 33 | Fog Lamp Relay, Daytime Running Lamps (DRL) Relay, Headlamp Ground Relay | 15 |
| 34 | Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1, HO2S Bank 1 Sensor 3, HO2S Bank 2 Sensor 1 | 20 |
| 35 | Left Rear Park/Turn Signal Lamps (Domestic), Left Tail/Stop Lamp, License Plate Lamp | 10 |
| 36 | Ignition Switch | 20 |
| 37 | Left/Right Heated Seat Modules, Left/Right Lumbar Switches | 20 |
| 38 | Park Lamp Relay, Headlamp Grounding Relay, Headlamp Switch | 20 |
| 39 | 1998: Transfer Case Control Module | 20 |
| Envoy: High Beam Relay | 20 | |
| 40 | Rear Window Defogger Grid | 30 |
| 41 | Blower Motor Relay (Manual Climate Control), Blower Motor Control Module (Electronic Climate Control) | 30 |
| 42 | Trailer Wiring Provision (Center High-Mounted Stop Lamp) | 10 |
| 43 | 1999–2005: Body Control Module (BCM), Remote Control Door Lock Receiver (RCDLR), Multifunction Switch (Flash-to-Pass) | 10 |
| 44 | Transfer Case Shift Control Module, Clutch Pedal Position (CPP) Switch (Manual Transmission), Park/Neutral Position (PNP) Switch, Backup Lamp Switch, Manual Transmission Clutch Start Switch | 10 |
| 45 | - | - |
| 46 | HID Headlamps | 20 |
| 47 | Multifunction Switch (Hazard Warning Flashers) | 20 |
| 48 | Center High-Mounted Stop Lamp (CHMSL), CHMSL Resistor, Cruise Control Module (CCM), Left/Right Tail/Stop Lamps, Dome Lamp | 10 |
| 49 | Heated Mirrors | 10 |
| 50 | Stop Lamp Switch, Center High-Mounted Stop Lamp (CHMSL) Relay | 20 |
| 51 | 1998: Truck Body Control Module (TBC), Remote Function Actuation (RFA) Module (Keyless Entry) | 10 |
| 1999–2005: Rear Window Wiper Motor | 15 | |
| 61 | Headlamp Washer | 15 |
| 62 | Outside Rearview Mirror Switch, Left/Right Door Lock and Power Window Switches, Liftglass Relay, Liftgate/Endgate Lock Cylinder Switch | 3 |
| 63 | Load Leveling Pump, Load Leveling Timer Relay | 25 |
| 64 | Transfer Case Shift Control Module, Transfer Case Encoder Motor (NP1) | 20 |
| Relays | ||
| 52 | Daytime Running Lamps (DRL) | |
| 53 | Fuel Pump | |
| 54 | Horn | |
| 55 | A/C Compressor | |
| 56 | Fog Lamp | |
| 57 | Low Beam Headlamps | |
| 58 | Starter | |
| 59 | Rear Window Defogger | |
| 65 | 1998: Headlamps | |
| Liftgate/Endgate Window Release Actuator | ||
| 66 | 1998: Center High-Mounted Stop Lamp (CHMSL) | |
Passenger Compartment Fuse Block
The fuse block is located on the driver's side of the instrument panel.
Remove the cover by turning the fastener counterclockwise.
| Diagram | ||
|---|---|---|
|
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| No. | Description | Amps |
| 1 | 1995–1997: Stop Lamps, Hazard Warning Flashers, Chime Module | 20 |
| 1998: Headlamp Switch | 10 | |
| 2 | 1995–1997: Dome Lamp, Glove Box Lamp, Illuminated Visor Vanity Mirror, Horn, Instrument Panel (I/P) Courtesy Lamp, Cigar Lighter, Liftgate Glass Release, Power Mirrors, Endgate Lock Switch, Keyless Entry, Cargo Lamp, Driver Information Center (DIC), Interior Lamps Control Module, Inside Rearview Mirror | 20 |
| 1998–2005: Cigar Lighter, Data Link Connector (DLC) | 15 | |
| 3 | 1995–1997: Electric Shift Transfer Case Module, Park Lamps, License Plate Lamp, Rear Window Washer Pump, Underhood Lamp | 20 |
| 1998–2005: Body Control Module (BCM), Cruise Control Module (CCM), Multifunction Switch (Cruise Control), Driver/Front Passenger Seat Lumbar Switches | 10 | |
| 4 | 1995: Automatic Transmission, Alternator Field, Variable Throttle Control, A/C Compressor, Instrument Cluster, Chime Module, 4WD Indicator Lamp, Heated Oxygen Sensor (HO2S), Daytime Running Lamps (DRL) Module, Rear Window Defogger Switch, Keyless Entry | 20 |
| 1996–1997: A/C Compressor Relay, Daytime Running Lamps (DRL) Control Module, DRL Relay, 4WD Indicator Switch, Front Axle Switch, Fuel Level Buffer Module, Inflatable Restraint Diagnostic Energy Reserve Module (DERM), Instrument Cluster, Interior Lamps Control Module, Rear Window Defogger Switch, Remote Control Door Lock Receiver (RCDLR), Seat Belt Warning Lamp, Ignition Key Warning Lamp, Transfer Case Select Switch, Transfer Case Shift Control Module | 10 | |
| 1998–2005: Body Control Module (BCM), Instrument Panel Cluster (IPC) | 10 | |
| 5 | 1995–1997: Linear EGR Valve, EVAP Canister Purge Solenoid, EVAP Canister Vent Solenoid Valve, Heated Oxygen Sensors (HO2S), Camshaft Position (CMP) Sensor, Vehicle Control Module (VCM), Powertrain Control Module (PCM), Mass Air Flow (MAF) Sensor | 20 |
| 1998: Radio, Heater Control (without A/C), Heater and A/C Control (with A/C), Fog Lamp Switch, I/P Module Switch, Truck Body Control Module (TBC), Transfer Case Select Switch, Instrument Cluster | 10 | |
| 1999–2005: Body Control Module (BCM), Outside Rearview Mirror Switch, Driver/Front Passenger Door Lock and Power Window Switches, Power Window Lockout Switch, Rear Seat Audio (RSA) Control, I/P Ashtray Lamp | 10 | |
| 6 | 1995: Heater and A/C Select Switch, Air Temperature Blend Door Actuator | 25 |
| 1996–1997: Air Temperature Blend Door Actuator, Heater and A/C Control, Heater Control | 20 | |
| 1999–2005: Steering Wheel Audio Controls | 2 | |
| 7 | 1995–1997: Auxiliary Power Outlets, Data Link Connector (DLC) | 25 |
| 1998: Outside Rearview Mirror Switch, Door Lock Switch Assembly, Power Window Switch Assembly | 5 | |
| 1999–2005: Headlamp Switch | 10 | |
| 8 | 1995–1997: Rear Window Defogger Switch | 30 |
| 1998–2005: Left/Right Console Courtesy Lamps, Inadvertent Power Relay, Transfer Case Shift Control Module (NP1) | 10 | |
| 9 | 1995: Powertrain Control Module (PCM) - Battery, ABS - Battery, Fuel Pump Relay | 15 |
| 1996–1997: Powertrain Control Module (PCM) - Battery, Fuel Pump Relay, Fuel Pump Switch, Engine Oil Pressure Sensor | 20 | |
| 1998–2005: Heater and A/C Control Module (with A/C), Heater Control (without A/C) | 20 | |
| 10 | 1995: Powertrain Control Module (PCM) - Ignition, Fuel Injectors, Engine Sensors | 10 |
| 1996–1997: Crankshaft Position (CKP) Sensor, Electronic Ignition Control Module (ICM), Fuel Injectors, Powertrain Control Module (PCM) | 20 | |
| 1998–2005: Multifunction Switch (Hazard Warning Flashers) | 20 | |
| 11 | 1995–1997: Radio, Inside Rearview Mirror Map Lamps, Rear Window Wiper/Washer, Driver Information Center (DIC) Control Module, Map/Dome Lamp Relay | 20 |
| 1998–2005: Instrument Panel Cluster (IPC), Automatic Transmission Shift Lock Control Actuator, Automatic Transmission, Powertrain Control Module (PCM) | 10 | |
| 12 | 1996–1997: Cruise Control Module, Cruise Control Switch (Multifunction Switch), Electronic Brake Control Module (EBCM), Torque Converter Clutch (TCC)/Brake and Cruise Control Release Switch | 10 |
| 1998: I/P Ashtray Lamp, Truck Body Control Module (TBC), Outside Rearview Mirror Switch, Door Lock Switch Assembly, Power Window Switch Assembly | 10 | |
| 1999–2005: Radio, Heater and A/C Control Module, Fog Lamp Switch, Rear Wiper/Washer and Endgate/Liftgate Window Release Switch, Driver Information Center (DIC), Automatic Transmission Shift Lever Position Indicator, Body Control Module (BCM), Transfer Case Select Switch, Instrument Panel Cluster (IPC), Headlamp Leveling Switch | 10 | |
| 13 | 1995: Clock, Radio - Battery, CD Player | 15 |
| 1996–1997: Radio | 10 | |
| 1998–2005: Left/Right Auxiliary Power Outlets, Floor Console Auxiliary Power Outlet, Rear Auxiliary Power Outlet | 20 | |
| 14 | 1995: Instrument Cluster Illumination, Ashtray Lamp, Radio Illumination, Heater Control Lamp, 4WD Indicator Illumination, Chime Module, Fog Lamp Switch Illumination, Daytime Running Lamps (DRL) | 5 |
| 1996–1997: A/C Compressor Relay | 10 | |
| 1998–2005: Door Lock Relay, Door Unlock Relay, Driver Door Unlock Relay (Power Door Locks) | 15 | |
| 15 | 1995: Daytime Running Lamps (DRL) Relay | 10 |
| 1996–1997: Fog Lamp Relay, Daytime Running Lamps (DRL) Relay | 20 | |
| 1998–2005: Powertrain Control Module (PCM), Transfer Case Shift Control Module, Transfer Case Shift Control Switch (NP1, NP8), Front Axle Vacuum Solenoid (NP1, NP8), Front Axle Indicator Switch (NP1, NP8) | 10 | |
| 16 | 1995–1997: Turn Signal Lamps, Backup Lamps, Backup Lamp Switch (Manual Transmission), Transmission Range Switch (Park/Neutral Position and Backup Lamp Switch) | 15 |
| 1998–2005: Inflatable Restraint Sensing and Diagnostic Module (SDM) | 15 | |
| 17 | Windshield Wiper Motor, Multifunction Switch (Wiper Switch) | 25 |
| 18 | 1995: Speedometer, Anti-lock Brake System (ABS), Cruise Control | 15 |
| 1999–2005: Redundant Steering Wheel Controls | 2 | |
| 19 | 1995–1997: Transfer Case Control Module (4WD) | 20 |
| 1998–2005: Radio, Instrument Panel Cluster (IPC), Heater and A/C Control Module, Vehicle Interface Unit (VIU) | 15 | |
| 20 | 1995: Diagnostic Energy Reserve Module (DERM) | 10 |
| 1996–1997: Clutch Pedal Position (CPP) and Cruise Control Release Switch, Inflatable Restraint Diagnostic Energy Reserve Module (DERM), Transfer Case Shift Control Module, Transmission Range Switch (Park/Neutral Position and Backup Lamp Switch) | 10 | |
| 1998–2005: Audio Amplifier | 25 | |
| 21 | 1995: Fog Lamp Relay | 20 |
| 1998–2005: Air Temperature Actuator, Heater and A/C Control Module, Automatic Dimming Inside Rearview Mirror, Inside Air Temperature Sensor Assembly, Vacuum Control Assembly | 10 | |
| 22 | 1995–1997: Airbag Diagnostic Energy Reserve Module (DERM), Arming Sensor | 10 |
| 1998–2005: Stop Lamp Switch, ABS - Electronic Brake Control Module (EBCM) | 10 | |
| 23 | 1995–1997: Automatic Transmission Position Indicator Lamp, Driver Information Center (DIC), Endgate Window Release Switch, Fog Lamp Switch, 4WD Indicator Switch, Heater and A/C Control, Instrument Cluster, Liftgate Window Release Switch, Radio, Rear Window Defogger Switch, Rear Window Wiper/Washer Switch, Seat Belt Warning Lamp, Ignition Key Warning Lamp | 10 |
| 1998–2005: Rear Window Wiper/Washer Switch, Endgate/Liftgate Window Release Switch | 15 | |
| 24 | 1995–1997: Instrument Cluster, Automatic Transmission, Park Pawl Actuator (Brake Transmission Shift Interlock Solenoid) | 10 |
| 1998–2005: Radio, Driver Information Center (DIC), Rear Seat Audio (RSA) Module, Vehicle Interface Unit (VIU), Outside Rearview Mirror Switch | 10 | |
| Circuit Breakers | ||
| A | 1995–1997: Power Door Locks | 20 |
| B | 1995–1997: Power Windows, Sunroof | 30 |