GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 Horn Component Views
Figure 1:

Steering Wheel Components
Object Number: 1739392 Size: LF
(1)Heated Steering Wheel Control Module (KA9)
(2)Horn Switch
(3)Steering Wheel Control Switch Assembly - Right (UK3)
(4)Horn Switch
(5)Steering Wheel Control Switch Assembly - Left (K34/KA9)
Figure 2:

Horns
Object Number: 1750395 Size: LF
(1)Horn - Right (7Z1/YE9)
(2)Radiator Core Support
(3)Horn - Left