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.
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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 493 (LIGHTING SYSTEMS)
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Section 493 (Lighting Systems)
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Section 493 (Lighting Systems)
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Lighting Systems
- Diagnostic System Check - Lighting Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC B2556: IP Dimmer Switch Voltage Low
- DTC B2641: Twilight Sentinel Delay Signal Voltage Low
- DTC B2646: Sun Load Sensor Voltage Low
- Symptoms - Lighting Systems
- Automatic Lamp Control Inoperative
- Backup Lamps Always On
- Backup Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Daytime Running Lamps (DRL) Always On
- Daytime Running Lamps (DRL) Inoperative
- Fog Lamp Indicator Always On - Rear
- Fog Lamp Indicator Inoperative - Rear
- Fog Lamps Always On
- Fog Lamps Always On - Rear
- Fog Lamps Inoperative
- Fog Lamps Inoperative - Rear
- Hazard Lamps Always On
- Hazard Lamps Inoperative
- Headlamps Always On - Low or High Beam
- Headlamps Inoperative - Low Beams
- Headlamps Inoperative - High Beams
- Headlamps Inoperative - Flash to Pass
- Headlamps Suggested Message On in Daylight Conditions
- Headlamps Suggested Message On in Low Light Conditions - Headlamps On
- High Beam Indicator Always On
- High Beam Indicator Inoperative
- Ignition Lock Cylinder Lamp Always On
- Ignition Lock Cylinder Lamp Inoperative
- Illuminated Entry Lamps Always On
- Illuminated Entry Lamps Inoperative
- Interior Backlighting Does Not Dim
- Interior Backlighting Inoperative
- IP Compartment Lamp Inoperative
- IP Compartment Lamp Always On
- License Lamps Inoperative
- Park Lamps Always On
- Park Lamps Inoperative
- Reading Lamp(s) Always On
- Reading Lamp(s) Inoperative
- Rear Compartment Lamp(s) Always On
- Rear Compartment Lamp(s) Inoperative
- Stop Lamps Always On
- Stop Lamps Inoperative
- Turn Signal Lamps and/or Indicators Always On or Flashing
- Turn Signal Lamps and/or Indicators Inoperative
- Vanity Mirror Lamp(s) Always On
- Vanity Mirror Lamp(s) Inoperative
- Repair Instructions
- Headlamp Switch Replacement
- Interior Lamp Switch Replacement
- Hazard Warning Switch Replacement - On Vehicle
- IP Dimmer Switch Replacement
- Ambient Light Sensor Replacement
- Hazard and Turn Signal Flasher Replacement
- Door Lamp Replacement
- Bulb Replacement - Ignition Cylinder Lamp
- Courtesy Lamp Replacement - Instrument Panel - Left
- Courtesy Lamp Replacement - Instrument Panel - Right
- IP Compartment Lamp Replacement
- IP Compartment Lamp Switch Replacement
- Courtesy Lamp Replacement - Rear Quarter
- Vanity Mirror Lamp Replacement
- Dome Lamp Replacement
- Headlamp Replacement
- Headlamp Bulb Replacement
- Headlamp Aiming
- Fog Lamp Replacement - Front
- Fog Lamp Bulb Replacement - Front
- Fog Lamp Replacement - Rear
- Park/Turn Signal Lamp Bulb Replacement
- High Mounted Stop Lamp Replacement
- Backup Lamp Bulb Replacement
- License Lamp Replacement (LX5 Engine/Steel Lid)
- Tail Lamp Replacement
- Tail Lamp Bulb Replacement
- Description and Operation
- Exterior Lighting Systems Description and Operation
- Exterior Lamps
- Headlamps
- Daytime Running Lamps (DRL)
- Front/Rear Fog Lamps
- Park, Tail and Marker Lamps
- Remote Keyless Entry Exterior Lamp Illumination
- Turn Signal/Hazard Lamps
- Stop Lamp
- Backup Lamps
- Lighting System Indicator(s)
- "HEADLAMPS SUGGESTED - 27" Message
- "TURN SIGNAL ON? - 24" Message
- Battery Run Down Protection/Inadvertent Power
- Interior Lighting Systems Description and Operation
- Exterior Lighting Systems Description and Operation
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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.