Understanding the fuse box layout in your 2002 GMC Yukon Denali is crucial for diagnosing and resolving electrical issues. Fuses protect your vehicle’s electrical circuits from overloads, and knowing their location and function can save you time and money on repairs. This guide provides a detailed look at the fuse box diagrams for your 2002 GMC Yukon Denali, ensuring you have the information you need at your fingertips. While this guide focuses on fuse box diagrams, understanding your vehicle’s electrical system is also important for OBDII diagnostics, as many OBDII codes can be related to fuse or relay issues.
Decoding the Fuse Boxes of Your 2002 GMC Yukon Denali
Your 2002 GMC Yukon Denali is equipped with three primary fuse box locations, each serving different circuits within the vehicle. These are the Instrument Panel Fuse Block, the Center Instrument Panel Fuse Block, and the Underhood Fuse Block. Let’s explore each of these in detail.
Instrument Panel Fuse Block Diagram
The Instrument Panel Fuse Block is typically located inside the vehicle, often on the driver’s side dashboard or under the steering column. This fuse box controls many of the interior electrical functions.
| Type | Description |
|---|---|
| Connector | L BODY_R Retained Accessory Power Relay |
| Fuse MINI | LOCK Power Door Locks |
| Relay | DRV UNLOCK_R Power Door Lock Relay |
| Relay | LOCK_R Power Door Lock Relay |
| Fuse MINI | HVAC 1 Climate Control System |
| Fuse MINI | CRUISE Cruise Control, Instrument Cluster |
| Fuse MINI | IGN 3 Ignition, Power Seats |
| Fuse MINI | 4WD Four-Wheel Drive System, Auxiliary Battery |
| Fuse MINI | CRANK Starting System |
| Fuse MINI | INT PRK Interior Lamps |
| Connector | L DOOR_R Power Door Lock Relay |
| Fuse MINI | BRAKE Anti-Lock Brake System |
| Fuse MINI | RR WIPER Rear Window Wiper |
| Fuse MINI | ILLUM Interior Lamps |
| Circuit breaker ATO | SEAT Power Seat Circuit Breaker |
| Fuse MINI | TURN Exterior Lamps, Turn Signals, Hazard Lamps |
| Fuse MINI | UNLOCK Power Door Locks |
| Fuse MINI | HTR A/C Climate Control System |
| Fuse MINI | WS WPR Windshield Wipers |
| Fuse MINI | IGN 1 Ignition, Instrument Panel |
| Fuse MINI | AIR BAG Air Bag |
| Fuse MINI | MIR/LOCK Power Mirrors, Power Door Locks |
| Fuse MINI | DR LOCK Power Door Locks |
| Circuit breaker ATO | PWR WDO Power Window Circuit Breaker |
| Relay | UNLOCK_R Power Door Lock Relay |
| Fuse MINI | IGN 0 PRND321 Display, Odometer, PCM |
| Fuse MINI | SEO IGN Special Equipment Option, Ignition, OnStar R |
| Fuse MINI | SEO ACCY Special Equipment Option Accessory, Cellular Telephone |
| Relay | RAP #1 Retained Accessory Power Relay |
| Fuse MINI | RDO 1 R Audio System, OnStar |
| Fuse MINI | RAP #2 Rear Power Windows, Sunroof, R Radio, OnStar |
Center Instrument Panel Fuse Block Diagram
The Center Instrument Panel Fuse Block is often found in the center console area or behind the radio and climate controls.
| Type | Description |
|---|---|
| Relay | SEO Special Equipment Option |
| Relay | HTD ST Heated Seats |
| Relay | VANITY Headliner Wiring |
| Relay | TRAILER Trailer Brake Wiring |
| Relay | PWR ST Power Seats |
| Relay | UPF Upfitter |
| Relay | PARK LAMP Parking Lamps (Relay) |
| Relay | PUDDLE LP Puddle Lamps |
| Relay | INADV PWR Interior Lights Feed (Relay) |
| Relay | CTSY LP Courtesy Lamps (Relay) |
| Relay | CEL PHONE Cellular Telephone Wiring |
Underhood Fuse Block Diagram
The Underhood Fuse Block is located in the engine compartment, usually near the battery. This box manages fuses and relays for critical engine and vehicle systems.
| Type | Description |
|---|---|
| Fuse MAXI | STUD #1 Accessory Power/Trailer Wiring Feed/Load Leveling |
| Fuse MAXI | ABS Anti-Lock Brakes |
| Fuse MAXI | IGN A Ignition Switch |
| Fuse MAXI | AIR A.I.R. System |
| Fuse MAXI | RAP #1 Retained Accessory Power, Power Mirrors, Power Door Locks, Power Seat(s) |
| Fuse MAXI | IGN B Ignition Switch |
| Fuse MAXI | RAP #2 Retained Accessory Power/Rear Power Windows, Sunroof, Radio |
| Fuse MAXI | STUD #2 Accessory Power/Trailer Wiring Brake Feed |
| Fuse MINI | TRL R TRN Right Turn Signal Trailer Wiring |
| Fuse MINI | TRL L TRN Left Turn Signal Trailer Wiring |
| Relay | IGN 1 Ignition, Fuel Controls |
| Fuse MINI | INJ B Ignition, Fuel Controls (Relay) |
| Relay | STARTER Starter (Relay) |
| Fuse MINI | PARK LP Parking Lamps |
| Fuse MINI | FRT HVAC Climate Control System |
| Fuse MINI | STOP LP Exterior Lamps, Stoplamps |
| Fuse MINI | ECM 1 PCM |
| Fuse MINI | CHMSL Center High Mounted Stoplamp |
| Fuse MINI | VEH STOP Stoplamps, Cruise Control |
| Fuse MINI | TRL B/U Backup Lamps Trailer Wiring |
| Fuse MINI | INJ A Fuel Controls, Ignition |
| Fuse MINI | RR HVAC Rear HVAC |
| Fuse MINI | VEH B/U Vehicle Backup Lamps |
| Fuse MINI | ENG 1 Engine Controls, Canister Purge, Fuel System |
| Fuse MINI | ETC Electronic Throttle Control |
| Fuse MINI | IGN E A/C Compressor Relay, Rear Window Defogger, Daytime Running Lamps, A.I.R. System |
| Fuse MINI | B/ULP Backup Lamps, Automatic Transmission Shift Lock Control System |
| Fuse MINI | ATC Automatic Transfer Case |
| Relay | RR DEFOG_R Rear Window Defogger, Heated Mirrors (Relay) |
| Fuse MINI | RTD Autoride (Real Time Damping) |
| Fuse MINI | RR PRK Right Rear Parking Lamps |
| Fuse MINI | ECM B PCM |
| Relay | F/PMP Fuel Pump (Relay) |
| Fuse MINI | O2 A Oxygen Sensors |
| Fuse MINI | O2 B Oxygen Sensors |
| Fuse MINI | LR PRK Left Rear Parking Lamps |
| Fuse MINI | RR DEFOG Rear Window Defogger, Heated Mirrors |
| Relay | HDLP Headlamps (Relay) |
| Fuse MINI | TRL PRK Parking Lamps Trailer Wiring |
| Fuse MINI | RT HDLP Right Headlamps |
| Relay | DRL_R Daytime Running Lamps (Relay) |
| Fuse MINI | HTD MIR Heated Mirrors |
| Fuse MINI | LT HDLP Left Headlamps |
| Fuse MINI | A/C Air Conditioning |
| Fuse MINI | AUX PWR Cigarette Lighter, Auxiliary Power Outlets |
| Fuse MINI | SEO 2 Special Equipment Option Power, Power Seats, Aux Roof Mnt Lamp |
| Fuse MINI | SEO 1 Special Equipment Option Power, Aux Roof Mnt Lamp, Cell Phone, OnStar R |
| Fuse MINI | DRL Daytime Running Lamps |
| Relay | A/C_R A/C (Relay) |
| Fuse MINI | FOG LP Fog Lamps |
| Relay | FOG LP_R Fog Lamps (Relay) |
| Fuse MINI | RADIO Audio System, Instrument Cluster, Climate Control System |
| Fuse MINI | CIGAR Cigarette Lighter, Auxiliary Power Outlets |
| Fuse MINI | RT TURN Right Turn Signals |
| Fuse MINI | BTSI Automatic Transmission Shift Lock Control System |
| Fuse MINI | LT TURN Left Turn Signals |
| Fuse MINI | FR PRK Front Parking Lamps, Sidemarker Lamps |
| Fuse MINI | W/W PMP Windshield Washer Pump |
| Relay | HORN_R Horn (Relay) |
| Fuse MINI | IGN C Ignition Switch, Fuel Pump, PRND321 Display, Crank |
| Fuse MINI | RDO AMP Radio Amplifier |
| Fuse MINI | HAZ LP Exterior Lamps, Hazard Lamps |
| Fuse MINI | HORN Horn |
| Fuse MINI | CTSY LP Interior Lamps |
| Fuse MINI | RR WPR Rear Wipers |
| Fuse MINI | TBC Body Control Module, Remote Keyless Entry, Headlamps |
By utilizing these fuse box diagrams, you can effectively troubleshoot electrical problems in your 2002 GMC Yukon Denali. Always refer to your vehicle’s owner’s manual for the most accurate and up-to-date information, and remember to disconnect the negative battery terminal before working on any electrical components. Understanding your fuse box is a vital step in maintaining your vehicle’s electrical health and ensuring optimal performance, and can be indirectly helpful in understanding some OBDII error codes that may arise from electrical faults.
