Shop LinesToGo for your 2004 GMC Sierra truck. The FL588-C4 set of fuel lines are ideal for any C/K2500HD/3500 truck with a regular cab, 8 foot bed and 6.6L engine. The engine code must read LB7 and the 8th digit of the VIN number needs to be the number 1. Stainless Steel

Mid year engine change in 2004, check 8th digit of VIN is number 1

Fuel Cooler Line included

Not Included in Set: Hoses between fuel line and fuel tank 5070-01 and Cooler Connector Lines FL591-A1 or SS591-A1. These parts are available for purchase separately.

Location: Engine to Hose Connection at Fuel Tank

Please Note: If you have purchased an aftermarket replacement fuel cooler, the fuel cooler connector lines attached to the fuel cooler may be different than the OEM fuel cooler connector lines. As shown in Illustration A, the aftermarket fuel cooler connector lines are made with a straight sharp edge. When these are plugged into the fuel cooler line, they will cut the o-ring inside the connector causing a leak. If you wish to replace the fuel cooler connector lines before installation of the fuel cooler line, they are available to purchase under part number FL591-A as shown in Illustration B.

We are unable to warranty any of our products that are damaged by aftermarket fuel cooler connector lines.

Illustration A                                                                             Illustration B

Aftermarket fuel cooler connector line:                           LinesToGo FL591-A fuel cooler connector line:

Straight Sharp Edge                                                                  Rounded Beveled Edge

OEM Part Number: 15169343

Included in Set: 1 supply line 1/2" ( in 2 easy to install sections), 1 return line 3/8" ( in 2 easy to install sections), 1 fuel cooler line 3/8",  hoses to engine connection, hoses to join rear and front sections, hose to fuel cooler connection

Tube Construction: Lines are constructed from Stainless Steel Tubing for rust protection with original equipment end forms and fittings and are CNC (Computer Numerically Controlled) bent for an easy precise installation.

Hose Construction: All hoses are made from Stainless Steel Braided Teflon with OE style fittings

Warranty: 1 Year

Box Dimensions: 47" x 12" x 12"

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