GMC 2003 Savana Owner's Manual page 342

Engine Compartment Fuse Block
The fuse block is in the engine compartment on the
driver's side of the vehicle.
Front of Vehicle
5-100
Fuse Usage
1 Radio Battery
2 Powertrain Control Module Battery
3 Left Rear Turn Lamp
4 Right Rear Turn Lamp
5 Backup Lamps Trailer Wiring
6 Ignition 0
7 Stop Lamp
8 Right Rear Defogger/Heated Mirror
Right Daytime Running Lamp/Turn
9
Signal
Left Daytime Running Lamp/Turn
10
Signal
11 Truck Body Control Module 4
12 Fuel Pump
13 Trailer
14 Flasher
15 Horn
16 Truck Body Control Module 3
17 Trailer Stop/Turn Signal
18 Truck Body Control Module 2
19 Truck Body Control Module
20 Remote Function Actuator
21 Engine 2
22 Ignition E