17NA304 Service Bulletin/Repair Instructions

File in Section:

Bulletin No.:
Service Bulletin
Date:
17-NA-304

September, 2017
TECHNICAL

Subject:
Brand:
Cadillac
Ticking, Rattle and/or Buzzing Noise Heard from inside Passenger Compartment,

Possible Fuel Leak
Model:
from
VIN:

to
Escalade
SOP
April

27, 2017
L86
Escalade

ESV
SOP
May

26, 2017
L86
Suburban
SOP
May

26, 2017
L83
Tahoe
SOP
April

27, 2017
L83
Yukon

Models
SOP
April

27, 2017
L83, L86
Yukon XL

Models
SOP
May

26, 2017
L83, L86
2015
to
Engine:
from
Chevrolet
GMC
Model Year:
2017
Transmission:
Note: For vehicles built after the build dates shown,

that exhibit condition 1, (ticking, rattle, or buzz from fuel

feed lines), refer to the latest version of PIP5395.
Involved Region or Country
North America and N.A. Export Regions

Some customers may comment on the following condition:

• A rattling and/or ticking noise that may be louder inside the vehicle than outside.
Condition 1
⇒ The noise may be picked up at the back of the left valve cover, and/or

underneath the vehicle near middle of the driver’s door.

⇒ This noise will be noticeable at idle, most noticeable in the 700-900 RPM

range.

⇒ The noise may also sound like a lifter tick.

⇒ This may also be called a fuel line buzz or ringing noise.

• While the rattle is occurring, the S-shape portion of the fuel feed line, right in front of

the tank, will be vibrating / rattling.
Condition 2
Some customers may comment on a fuel leak.

Diagnosis that the fuel leak is originating from the fuel feed line at the molded-in clip on

top of tank.
Cause
The rattling, ticking noise may be caused by the check valve in the low pressure fuel feed

jumper line at the engine not fully seating, allowing pressure pulses from the high

pressure side back into the low pressure side of the fuel system.

These pressure pulses could cause the S-shaped portion of the fuel feed line, in front of

the tank, to vibrate and/or rattle

If the S-shaped portion of the fuel line rattles over a period of time, the fore-aft motion in

the line could result in wear. This wear could result in a fuel leak where the line is secured

into the molded-in clip on the tank.
Copyright 2017 General Motors LLC. All Rights Reserved.
Page 2
September, 2017
Bulletin No.: 17-NA-304
4863652
1. Using a stethoscope or equivalent, engine running, listen to the low pressure fuel

pipe connection (1) at the left side of the engine (2). (Will be very loud in

stethoscope while issue is occurring.)

Correction 1
4863631
2. Engine running, inspect the low pressure fuel pipe S-shaped portion (1) in front of

the fuel tank for vibration / rattle.

• If the vibration / rattle condition is present, then the low pressure fuel feed

jumper pipe at the engine will need to be replaced and the fuel feed pipe at the

tank will need to be replaced with the updated design.
Bulletin No.: 17-NA-304
September, 2017
Page 3
Correction 2
4863689
1. Inspect to determine whether the fuel leak is originating from the fuel feed pipe

where it is retained into the molded-in clip (1) on top of the fuel tank.

• If the fuel leak is originating from the molded-in clip area of the fuel feed line,

then the low pressure fuel feed jumper pipe at the engine will need to be

replaced and the fuel feed pipe at the tank will need to be replaced with the

updated design.
Service Procedure

Install a new low pressure fuel feed jumper line at the

engine, and replace the original design fuel feed line at

the tank with the appropriate updated design PN listed

in the Parts table, following the procedure below.
Page 4
September, 2017
Bulletin No.: 17-NA-304
4863828
Low pressure fuel feed jumper pipe at engine
Original design fuel feed line at tank
4870639
4863840
Updated design fuel feed line at tank

Note: Summarized below are key notes for both the

low pressure fuel feed jumper pipe at the engine and

the low pressure chassis fuel feed pipe at the tank.

Refer to Fuel Feed Pipe Replacement (At Engine) and

Fuel Feed Pipe Replacement (At Tank) for complete

procedures.
Bulletin No.: 17-NA-304
September, 2017
Page 5
4864094
1. Replace the low pressure fuel feed jumper pipe (1)

at the engine.

2. Lower the fuel tank assembly and remove from the

vehicle.

3. Remove the low pressure chassis fuel feed pipe

from the fuel tank.

Note: Provide protection for the fuel feed port on the

fuel pump module.
4. Using shop air, clean the fuel feed pipe run

channel on the tank to remove dirt and debris.
4863840
5. Position the updated design fuel feed pipe to the

fuel tank and make connection to the fuel pump

module.
4863833
Page 6
September, 2017
Bulletin No.: 17-NA-304
Warranty Information

For vehicles repaired under the Emission coverage,

use the following labor operation. Reference the

Applicable Warranties section of Investigate Vehicle

History (IVH) for coverage information.

Labor

Operation

4081878*
Description
Labor Time
Fuel Feed Pipe

Replacement at Engine

and Tank
2.7 hrs
*This is a unique Labor Operation for Bulletin use only.
4864117
6. Install the fuel line into the tank molded-in clip and

ensure the line is fully seated.

7. Install the fuel tank to the vehicle.

8. Validate the vibration / rattle in the fuel line has

been eliminated.
Parts Information

Causal

Part
Description
Part

Number
Qty
x
Pipe Asm-Fuel

Feed (Jumper at

Engine)
12618338
1
x
Hose Asm-Fuel

Feed (at Tank)

(Updated

Design, SWB)
84200271
1
x
Hose Asm-Fuel

Feed (at Tank)

(Updated

Design, LWB)
84200274
1
Version
1
Modified
Released September 22, 2017
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these

technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper

service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a

job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your

vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the

information.
WE SUPPORT VOLUNTARY

TECHNICIAN

CERTIFICATION

SaleBestseller No. 1

OBD2 Scanner Diagnostic Tool XTOOL Anyscan A30M V2.0, 2026 Wireless Bidirectional Scan Tool with Free Updates, 26 Resets, All System for Android & iPhone, Crank Sensor Relearn, EPB, Throttle Relearn

Stay Updated with Lifetime Access: This obd2 scanner includes lifetime free software updates for all app service functions. With a single payment, enjoy full access to diagnostics, reset tools, and maintenance features — zero subscription fees. A budget-friendly choice for weekend mechanics, home car owners, and DIYers, supporting vehicles from 1996 onward. Come to us with your VIN to check compatibility.
Full Bidirectional Control/Active Tests & Stable Wireless Connectivity: This car code reader features full bidirectional control, allowing you to send commands to the vehicle's ECU for active tests on components such as fuel pumps, injectors, A/C clutches, windows, sunroofs, and more. This car scanner diagnostic tool helps DIYers quickly diagnose and test vehicle parts, cutting down troubleshooting and repair time. With BT 4.0 wireless connectivity, you can enjoy cable-free diagnostics up to 33 feet. Stand in your garage and test windows, wipers, or even engine components—all without needing to move around your car.
Portable Car Scanner with 26 Resets: Scheduled vehicle maintenance with the A30M car diagnostic scanner can keep your vehicle in peak condition and save you big on dealership trips. The XTOOL A30M obd2 scanner diagnostic tool features essential reset and relearn functions, such as Oil Reset, EPB Reset (Electronic Parking Brake Release), SAS, ABS Brake Bleeding, Throttle Body Relearn, Injector Coding, Crank Sensor Relearn, Headlight Adjustment, and Tire Size Reset. Note: Service functions may vary by vehicle model – check compatibility beforehand!
Wide Compatibility CAN FD & FCA Autoauth: This obd2 scanner diagnostic tool is compatible with over 85+ car brands from the U.S., Europe, and Asia, providing extensive coverage through a BT connection with your smartphone or iPad. Now upgraded to support the latest protocols, it includes FCA AutoAuth access for Chrysler, Jeep, Dodge, and Fiat (2018+), and supports CAN FD for GM (2020+) models, giving you greater access to newer vehicles and systems. Note: The FCA AutoAuth account is not included with the device. Users must register and pay separately through the official FCA AutoAuth website to access diagnostic functions for vehicles that require it.
Up to 8 Live Data Streams Graphing – Real-Time Graphing for Deeper Insight: This car scanner supports up to 8 live data streams simultaneously with intuitive, real-time graphing. Gain comprehensive insights into your vehicle’s performance, making it easier to spot issues, detect trends, and make informed diagnostic decisions with confidence.

SaleBestseller No. 2

XTOOL Anyscan A30D OBD2 Scanner Diagnostic Tool - Bidirectional Scan Tool Wireless - Lifetime Updates & 19 Resets Crank Sensor EPB Throttle Relearn - Full System Car Code Reader for iPhone & Android

Save $500+/Year with Pro-Level Diagnostics -No Subscriptions: The Portable XTOOL Anyscan A30D OBD2 scanner diagnostic tool includes free lifetime software updates for all app service functions, without extra cost. With a single payment, enjoy full access to diagnostics, relearn scan tools, and maintenance features. A cost-effective, smart choice for car owners and DIY enthusiasts, compatible with vehicles from 1996 onward. Please provide the car VIN and the special functions you need in advance so that we can confirm compatibility
Bi-Directional Control for Faster Troubleshooting: Unlike a basic code reader, the A30D bi directional scan tool sends commands directly to your vehicle’s ECU to actively test components like fuel pump, valves, wipers, windows, doors, sunroof, and headlamps right from your smartphone. See component responses in real time without disassembly—perfect for brake jobs, electrical issues, and hard-to-find problems. This bidirectional obd2 scanner helps pinpoint faults faster, reduce guesswork, and avoid replacing good parts. An efficient, easy-to-use car scanner diagnostic tool built for DIYers, home garage users, and small-shop technicians who want real two-way scanner, not just codes
19 Reset Functions for Routine Maintenance: The A30D car diagnostic scanner provides 19 relearn functions without extra charges, including EPB Reset for parking brake replacement, TPMS Reset after tire changes, ABS Auto Bleeding, Oil Reset, SAS Reset, BMS Reset, Throttle Relearn, Injector C0ding, Gear Learning, Crank/Crankshaft/Cam/Ckp Sensor Relearn Tool, Transmission Match, Seat Calibration, Airbag Repair and more. This XTOOL A30D automotive scanner diagnostic tool supports preventive care, helping extend vehicle life and reduce costly shop visits. Functions vary by vehicle make and year—plz confirm compatibility before purchase
Stable BT Connection & All-System & 8 Pids Live Data: The A30D wireless OBD2 scanner delivers a fast and stable wireless connection up to 33 feet, letting you move freely around the vehicle without tangled cables. Pair with with Android 9.0+ and iOS 10.0+ devices to turn your phone into a mobile auto scanner—perfect for home garages, driveways, or on-the-spot repairs. This full system scanner for cars provides real-time access to all major modules, including Engine, Gearbox, ABS, SRS, AC and more. with clear graphs, meters, and up to 8 PIDs displayed at once. This car code reader makes system monitoring visual, simple, easy to understand, and offering data logging for playback and deeper
Wide Compatibility with CAN-FD & FCA Support: The A30D car computer diagnostic reader works with most 1996 and newer vehicles with a standard OBD2 port, including for Ford, for GM, for Toyota, for Honda, for Nissan,for Hyundai etc, with ongoing updates covering more car models and functions later. It also supports newer communication protocols like CAN-FD and FCA AutoAuth (Personal AutoAuth account and active subscription required, not included with the device!for Chrysler, for Dodge, for Jeep, for Fiat models). It is a future-ready automotive scanner diagnostic tool for households with multiple vehicles or part-time techs. Coverage vary by cars, plz check the compatibility first

SaleBestseller No. 3

XTOOL D7 Bidirectional Scan Tool: 2026 Ai-Assisted OBD2 Scanner Diagnostic Tool with 36+ Resets, Full System Car Scanner with EPB, Injector Test, Throttle, Crank Sensor Relearn, FCA, CANFD & DoIP

2026 Latest Version – Now Upgraded from 32GB to 64GB: XTOOL D7 obd2 scanner diagnostic tool with bidirectional is designed for DIY enthusiasts, professional mechanics. It now offers 64GB storage for smoother operation. Its 5000mAh battery (with 2500mAh 7.3V fast-charging) supports all-day use. With FCA, CAN FD, and DOIP protocol support, it covers more vehicle models and newer systems. A newly added battery voltage reading shows battery status before diagnostics, helping prevent low-voltage tests that could harm the vehicle. The V2.0 Diagnostic Report allows shops to personalize results with logos, customer details, and attachments to build trust and maintain records.
Save $500+/Year with Pro-Level Diagnostics: Whether you're a DIYer, starting a repair business, or beginning work at an auto shop, XTOOL D7 car scanner offers advanced features typically found only in expensive professional OBD2 scanners - without the high price tag. With 4,000+ Active Tests & Bidirectional Pids, 36+ Special Functions, advanced module resets like SRS Reset, OE-level All-System Scan (one-click), FCA AutoAuth, CAN FD, DoIP, data export, and 8 PIDs graphing, the D7 auto scan tool covers 100,000+ vehicles (excluding Indian models). Includes 3-Year updates and supports the XV200 endoscope to detect em!ssions and intermittent issues.
Full Bidirectional Advantage Over Other Code Readers & Scan Tools: The XTOOL D7 automotive scanner offers true bidirectional control plus advanced bidirectional PIDs, letting you send commands to components like A/C clutches, fuel injectors, windows, fans and more, while monitoring sensor responses live to catch elusive issues (even those without warning lights). Unlike budget bidirectional obd2 scanners limited to basic active tests,the D7 car fault scanner gives you full bidirectional control to run ABS pump tests, throttle position, turn fan on/off and solenoid tests, etc. No guessing, no extra fees—just smarter diagnostics
OE-Level Full System Car Diagnostic Scanner with 8 Live Data Graphs: The XTOOL D7 is a pro-grade diagnostic tool that gives you full access to all vehicle systems—just like Snap on scanners & the factory scan tools, it delivers deep, accurate diagnostics you can trust. Easily view live data streams, retrieve freeze frame, and run active tests to pinpoint issues fast. With the ability to graph up to 8 PIDs at once, you can spot performance trends and troubleshoot like a pro. Whether you're a mechanic or car owner, with the D7 auto scanner you can stay ahead of problems and keep your vehicle running at its best
High-value Automotive Scanner Diagnostic Tool with 36+ Special Function, Module Resets, Relearns, Calibrations, Adaptations & Initializations: XTOOL D7 diagnostic tool packs 36+ common & advanced maintenance, skip the $150 fee for battery registration after replacement, throttle body relearn after cleaning, or TPMS resets post-rotation, Auto bleed after the pad changes, or Electronic Parking Brake. Need to reset the transmission after towing? Crank sensor relearn for GM/for Dodge? Done. D7 also covered advanced functions like Ad~blue Reset, VIN Write, and many more professional OBD2 scanner functions that we can't list here. Text us your VIN + what you need, we’ll check the compatibility

This product presentation was made with AAWP plugin.

Last update on 2026-05-12 / Affiliate links / Images from Amazon Product Advertising API

Buffer Email Facebook Flipboard Hacker News LinkedIn Messenger Mix Pinterest Print Reddit SMS Telegram Tumblr X VK WhatsApp Line Xing Threads Bluesky Copy Mastodon Nextdoor