GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra - 2WD 🢒 HVAC 🢒 HVAC - Manual 🢒 HVAC Component Views
Figure 1:

Front of Engine Compartment (4.3L)
Object Number: 1888657 Size: LF
(1)Battery Current Sensor
(2)Mega Fuse
(3)A/C Low Pressure Switch (C67/CJ2)
(4)Fuse Block - Underhood
(5)Engine Control Module (ECM)
(6)A/C Refrigerant Pressure Sensor (C67/CJ2)
(7)Mass Airflow (MAF)/Intake Air Temperature (IAT) Sensor
(8)Battery - Right
Figure 2:

Left Front of Engine Compartment (Diesel)
Object Number: 1870635 Size: LF
(1)Engine
(2)Front Fascia
(3)A/C Low Pressure Switch (C67/CJ2)
(4)Surge Tank
(5)Engine Coolant Level Switch
Figure 3:

Left Side of Engine (4.3L)
Object Number: 1887842 Size: LF
(1)Generator
(2)Throttle Body
(3)Transmission
(4)Park/Neutral Position (PNP) Switch
(5)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
(6)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(7)Knock Sensor (KS) - 1
(8)Engine Coolant Temperature (ECT) Sensor
(9)A/C Compressor Clutch (C67/CJ2)
Figure 4:

Top of Engine Diesel
Object Number: 1870624 Size: LF
(1)Turbocharger Vane Position Control Solenoid Valve
(2)Glow Plug Control Module (GPCM)
(3)Fuel Rail Temperature (FRT) Sensor
(4)Intake Air Temperature (IAT) Sensor 2 Connector
(5)X128
(6)A/C Refrigerant Pressure Sensor (C67/CJ2)
(7)Generator - Left (K76)
(8)A/C Compressor Clutch (C67/CJ2)
(9)Engine Coolant Temperature (ECT) Sensor 1
(10)Engine Coolant Temperature (ECT) Sensor 2
(11)Camshaft Position (CMP) Sensor
(12)X127
(13)Generator - Right
(14)Manifold Absolute Pressure (MAP) Sensor
(15)Intake Air Heater (IAH) Module
(16)Intake Air Temperature (IAT) Sensor 2
(17)Fuel Heater
(18)A/C Low Pressure Switch (C67/CJ2)
Figure 5:

Right Rear of the Engine Compartment (Gas -4.3L)
Object Number: 1714221 Size: LF
(1)Battery - Right
(2)A/C Low Pressure Switch (C67/CJ2)
(3)A/C Compressor Clutch (C67/CJ2)
(4)A/C Refrigerant Pressure Sensor (C67/CJ2)
(5)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
Figure 6:

Front of the I/P -YE9
Object Number: 1855926 Size: LF
(1)Driver Information Center (DIC) Switch (UK3)
(2)Instrument Panel Cluster (IPC)
(3)Radio
(4)Ambient Light/Sunload Sensor Assembly (CJ2)/Ambient Light Sensor (C67/C42)
(5)HVAC Control Module
(6)Inflatable Restraint I/P Module Disable Switch (C99)
(7)Power Take-Off (PTO) Switch
(8)Auxiliary Power Outlet - Front 2
(9)I/P Multifunction Switch Assembly (JL4/JF4/UD7/XA7)
(10)Auxiliary Power Outlet - Front 1
(11)Transfer Case Shift Control Switch (NQF/NQH)
(12)Trailer Brake Control Panel Switch (JL1)
(13)Headlamp and Panel Dimmer Switch
Figure 7:

Front of the I/P +YE9
Object Number: 1909163 Size: LF
(1)Instrument Panel Cluster (IPC)
(2)Inflatable Restraint Steering Wheel Module
(3)Shift Control Lever
(4)Ambient Light/Sunload Sensor Assembly (CJ2)/Ambient Light Sensor (C67/C42)
(5)Speaker - Center (UQA +Y91)
(6)Radio
(7)Inflatable Restraint I/P Module
(8)I/P Compartment Lamp
(9)HVAC Control Module
(10)Auxiliary Power Outlet - Front 2
(11)I/P Multifunction Switch Assembly (JL4/JF4/UD7/XA7)
(12)Auxiliary Power Outlet - Front 1
(13)Driver Information Center (DIC) Switch (UK3)
(14)Steering Wheel Control Switch Assembly - Right (UK3)
(15)Steering Wheel Control Switch Assembly - Left (K34/KA9)
(16)Trailer Brake Control Panel Switch (JL1)
(17)Headlamp and Panel Dimmer Switch
(18)Dimmer Control
(19)Transfer Case Shift Control Switch (NQF/NQH)
(20)Turn Signal Multifunction Switch
Figure 8:

Interior HVAC Module
Object Number: 1860666 Size: LF
(1)Air Temperature Actuator
(2)Recirculation Actuator (C67)
(3)Blower Motor
(4)Blower Motor Control Module
(5)Mode Actuator