GMC 2014 Sierra Owner's Manual page 404

1 Trailer Brake
2 Trailer Battery
3 Antilock Brake
System Pump
4 Instrument Panel
BEC 1
5 MSB Passenger
6 4WD Trec
7 Electric Parking
Brake
8 Instrument Panel
BEC 2
9 MSB Driver
10 Rear Window
Defogger
11 Starter
12 Cooling Fan 1
13 Cooling Fan 2
14 Trailer Stop/Turn
Lamps, Left
15 Trailer Park Lamps
16 Trailer
Back-up Lamp
17 Trailer Stop/Turn
Lamps, Right
18 Fuel Pump
19 Integrated Chassis
Control Module
20 Electronic
Suspension
Control Module
21 Fuel Pump Power
Module
22 Upfitter Switch 1
23 Upfitter 2
24 Front Wiper
25 Antilock Brake
System Valves
26 Upfitter SW 2
27 Upfitter SW 3
28 Parking Lamps,
Right
29 Parking
Lamps, Left
30 Upfitter 3
31 Upfitter SW 4
32 Upfitter 4
33 Back-up Lamps
34 Engine Control
Module Ignition