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.
Replacement of Connector When Replacing Fuel Tank Module/Fuel Pump Module (04-06-04-088C)
Reference number: 04-06-04-088C
Supersedes refnos: 04-06-04-088, 04-06-04-088A, 04-06-04-088B
Replacement of Connector When Replacing Fuel Tank Module/Fuel Pump Module
TECHNICAL SERVICE BULLETIN
| Affected Model(s): | 1999-2003 Cadillac Escalade; 1996-2001 Chevrolet Suburban; 1996-2003 Chevrolet Silverado, Tahoe; 1996-2001 GMC Suburban, Yukon XL; 1996-2003 GMC Sierra, Yukon; 1500 Series Vehicles Only; ; Excludes E85 Flexible Fuel Vehicles (VIN Z - RPO L59) and Diesel Vehicles (VINs F, S, Y, 1 - RPOs L65, L56, L57, LB7) |
| Supercedes: | This bulletin is being revised to provide a technician tip for installing new connector. Please discard Corporate Bulletin Number 04-06-04-088B (Section 06 - Engine/Propulsion System). |
SERVICE INFORMATION
Analysis of returned parts has determined that any residual damage to the connector may result in a voltage drop across the module and can lead to repeat failures. Therefore, GM Engineering is advising technicians to replace the connector anytime the Fuel Tank Module/Fuel Pump Module is replaced.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
