GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Savana 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Heater Blower Controls Component Views
Figure 1:

Auxiliary Heater and A/C Wiring
Object Number: 375651 Size: MF
(1)C407
(2)Auxiliary Blower Motor High Speed Relay
(3)Auxiliary Blower Motor Medium Speed Relay
(4)Auxiliary Blower Motor Low Speed Relay
(5)Auxiliary Blower Motor
(6)Rear Auxiliary Mode Valve and Seal Assembly (Mode Door Motor)
(7)Rear Auxiliary Temperature Valve Assembly (Temperature Door Motor)
(8)Auxiliary Blower Motor Resistor
(9)C408
Figure 2:

Auxiliary Blower Motor Switch
Object Number: 375620 Size: MF
(1)Auxiliary Blower Motor Switch
Figure 3:

Heater and A/C Controller
Object Number: 375623 Size: MF
(1)Heater and A/C Controller (Heater Controller - Base)
(2)Blower Motor Switch (Part of Heater and A/C Controller)
(3)Heated Mirror Switch (Part of Heater and A/C Controller)
Figure 4:

Underhood Lamp, Underhood Reel Lamp, Blower Motor, Blower Motor Resistor/Relay
Object Number: 314697 Size: MF
(1)Underhood Lamp
(2)Underhood Reel Lamp (TR9)
(3)Blower Motor
(4)Blower Motor Resistor/Relay