2004 Chevrolet Tracker RWDFACTORY OEM SERVICE PROCEDURE

Engine Controls Component Views

Fig 1: Information Sensors/Input Devices
GM690180Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Tank Pressure (FTP) and Fuel Vapor Temperature Sensor
2 Fuel Level Sensor
3 ECT Sensor
4 CMP Sensor
5 HO2S 2 without WU-TWC
6 ABS Control Module
7 HO2S 1
8 HO2S 2 with WU-TWC
9 Knock Sensor
10 PSP Switch-if equipped
11 MAF Sensor
12 IAT Sensor
13 Electrical Load Diode
14 TP Sensor
15 MAP Sensor
16 CKP Sensor-located behind flywheel/flexplate
17 A/C Compressor Control Module
18 VSS
Fig 2: PCM Controlled Devices with ORVR
GM690186Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Malfunction Indicator Lamp (MIL)
2 Main Relay
3 Fuel Pump Relay
4 Ignition Coils
5 Power Steering Pressure (PSP) Switch
6 EVAP Canister Purge Valve
7 A/C Condenser Fan Relay
8 Idle Air Control (IAC) Valve
9 Exhaust Gas Recirculation (EGR) Valve
10 Fuel Injectors
11 EVAP Canister Vent Valve
Fig 3: Other Engine Control System Components with ORVR
GM690187Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Speedometer-located in the instrument panel
2 Data Link Connector (DLC)
3 Powertrain Control Module (PCM)
4 Battery
5 Noise Filter for the ignition system
6 EVAP Canister
Fig 4: Engine Compartment View with ORVR
GM690191Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 PCV Hose
2 PCV Breather Hose
3 Fuel Pressure Regulator
4 TP Sensor
5 IAC Valve
6 EVAP Canister Purge Valve
7 Fuel Return Hose
8 Fuel Feed Hose
9 MAP Sensor
10 A/T Throttle Cable
11 Accelerator Control Cable
Fig 5: ECT Sensor and EGR Valve
GM468060Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 EGR Valve
2 ECT Sensor
3 Fuel Injector Electrical Harness Connector
4 Throttle Body Inlet Coolant Line
5 Throttle Body Outlet Coolant Line
6 IAC valve
7 EVAP Canister Purge Valve
8 TP Sensor
9 Fuel Lines
10 Engine Grounds
11 MAP Sensor
Fig 6: Ignition System
GM467906Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Ignition Coils
2 Noise Suppressor
3 PCM
4 CMP Sensor
5 Spark Plugs
Fig 7: Main Relay and Fuel Pump Relay
GM468070Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Main Relay
2 Fuel Pump Relay
3 Junction Box (located above left side hinge pillar trim panel)
Factory Service Tools

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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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