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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - 4.8L, 5.3L, AND 6.0L - INTRODUCTION (2 OF 2)REPAIR INSTRUCTIONSFUEL COMPOSITION SENSOR REPLACEMENT (5.3L (L59) ENGINE)REMOVAL PROCEDURE

2006 Chevrolet Suburban C2500, 6.0 U

Removal Procedure

2006 Chevrolet Suburban C2500, 6.0 USECTION Removal Procedure

Fig 1: Fuel Composition Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
If equipped, remove the transfer case shield. Refer to one of the following:
- Transfer Case Shield Replacement in Transfer Case BW 4481 - NR3
- Transfer Case Shield Replacement in Transfer Case BW 4482 - NR4
- Transfer Case Shield Replacement in Transfer Case NVG 246 - NP8
Disconnect the fuel composition sensor electrical connector.

Fig 2: Fuel Line & Retainers

Courtesy of GENERAL MOTORS CORP.

Remove the fuel line retainers (1).
Disconnect the fuel composition sensor fuel lines. Refer to Quick Connect Fitting(s) Service (Metal Collar) .

Fig 3: View Of Fuel Composition Sensor, Bracket & Bracket Nuts

Courtesy of GENERAL MOTORS CORP.

Remove the fuel composition sensor bracket nuts.
Remove the fuel composition sensor.
If required, remove the fuel composition sensor bolts and remove the sensor from the bracket.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.