GMC T-Series 2007 - Page 283

Relay Block B Usage
1
Air Conditioning Condenser
(If Equipped)
2
Air Conditioning Compressor
(If Equipped)
3 Heater Fan
4 Ignition (Accessory)
5 Ignition (1)
6 Ignition (2)
7 Auxiliary
8 Horn
9 Ignition (3)
10 Dome Lamp (If Equipped)
11 Exhaust Brake (If Equipped)
12
Power Take-Off Control
(If Equipped)
Relay Block B
283