Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 GMC Jimmy 2D Utility, Part Time, StandardFACTORY OEM SERVICE PROCEDURE
Component Locations
NOTE:
For component locations refer to COMPONENT LOCATIONS - ASTRO & SAFARI or COMPONENT LOCATIONS - BLAZER, JIMMY CANADIAN, SAFARI & S10 PICKUP
table or illustrations. See Fig 1-Fig 17
.
COMPONENT LOCATIONS - ASTRO & SAFARI
| Component | Location |
|---|---|
| A/C Compressor Clutch Relay | In Underhood Fuse/Relay Block |
| A/C High Pressure Cut-Off Switch | On Rear Of A/C Compressor |
| A/C Low Pressure Cut-Out Switch | On Top Of A/C Receiver Dryer |
| Camshaft Position Sensor | In Distributor |
| Crankshaft Position Sensor | Behind Crankshaft Pulley |
| Cruise Control Module | Center Of Dash, Left Of Windshield Wiper Module |
| Data Link Connector | Under Left Side Of Instrument Panel |
| EGR Valve Solenoid | Top Of Engine, Left Of Generator |
| Engine Coolant Temperature Sensor | On Left Side Of Engine, Between Spark Plugs |
| EVAP Canister Purge Solenoid | Top Of Engine, Near MAP Sensor |
| EVAP Canister Vent Solenoid | Left Frame Rail, Near Fuel Filter |
| Fuel Pump Relay | In Underhood Fuse/Relay Block |
| Heated Oxygen Sensor - Bank 1, Sensor 1 | Left Front Exhaust Pipe |
| Heated Oxygen Sensor - Bank 1, Sensor 3 | Rear Of Catalytic Converter |
| Heated Oxygen Sensor - Bank 2, Sensor 1 | Right Front Exhaust Pipe |
| Heater & A/C Control Module | Center Of Instrument Panel, At Heater Control |
| Idle Air Control Valve | Left Rear Of Throttle Body |
| Ignition Control Module | Top Of Engine, In Front Of Coil |
| Intake Air Temperature Sensor | In Air Intake Duct |
| Knock Sensor | On Top Rear Of Engine, Above Transmission Bellhousing |
| Manifold Absolute Pressure Sensor | Top Center Of Engine |
| Mass Airflow Sensor | In Air Intake Duct |
| Oil Pressure Switch | Rear Of Engine, Left Of Distributor |
| Throttle Position Sensor | On Side Of Throttle Body |
| Underhood Fuse/Relay Block | Left Front Side Of Engine Compartment, Near Battery |
| Vehicle Control Module | Near Battery |
| Vehicle Speed Sensor | Rear Of Transmission |
COMPONENT LOCATIONS - BLAZER, JIMMY CANADIAN, SONOMA & S10 PICKUP
| Component | Location |
|---|---|
| A/C Compressor Clutch Relay | In Underhood Fuse/Relay Block |
| A/C Compressor High Pressure Cut-Off Switch | On Rear Of A/C Compressor |
| A/C Compressor Cycling Switch | On Accumulator |
| Body Control Module | Lower Rear Of Instrument Panel, On Heater |
| Camshaft Position Sensor | In Distributor |
| Crankshaft Position Sensor | Behind Crankshaft Pulley |
| Cruise Control Module | Left Rear Of Engine Compartment, On Cowl |
| Data Link Connector | Lower Left Side Of Instrument Panel |
| EGR Valve | Top Front Of Engine |
| Engine Coolant Temperature Sensor | Left Side Of Engine, Between Spark Plugs |
| EVAP Canister Purge Solenoid | Top Right Rear Of Engine |
| EVAP Canister Vent Solenoid | On Crossmember, Behind Fuel Tank |
| Fuel Pump Relay | In Underhood Fuse/Relay Block |
| Fuel Tank Pressure Sensor | Top Of Fuel Tank |
| Heated Oxygen Sensor - Bank 1, Sensor 1 | Left Exhaust Pipe, Ahead Of Catalytic Converter |
| Heated Oxygen Sensor - Bank 1, Sensor 3 | Rear Of Catalytic Converter |
| Heated Oxygen Sensor - Bank 2, Sensor 1 | Right Exhaust Pipe, Ahead Of Catalytic Converter |
| Idle Air Control Valve | On Throttle Body |
| Ignition Control Module | Top Right Side Of Engine |
| Intake Air Temperature Sensor | In Air Intake Duct |
| Knock Sensor | Top Rear Of Engine, Above Transmission Bellhousing |
| Manifold Absolute Pressure Sensor | Top Center Of Engine |
| Mass Airflow Sensor | In Air Intake Duct |
| Relay Block | Behind Left Side Of Instrument Panel, Right Of Fuse Block |
| Throttle Position Sensor | On Throttle Body |
| Underhood Fuse/Relay Block | On Left Side Of Engine Compartment, On Wheelwell |
| Vehicle Control Module | Right Front Of Engine Compartment |
| Vehicle Speed Sensor (A/T With 2WD) | Right Rear Of Transmission |
| Vehicle Speed Sensor (A/T With 4WD) | Right Rear Of Transfer Case |
| Vehicle Speed Sensor (M/T With 2WD) | Left Rear Of Transmission |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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