Add to Cart
The item has been added
The Merchant Automotive Fuel Pressure Regulator Kit for 2004.5-2005 LLY Duramax includes a genuine Bosch fuel pressure regulator along with the seals and gaskets for the intake tube, EGR tube and upper radiator pipe, which are typically removed to reach the regulator. A faulty fuel pressure regulator can cause symptoms such as a surge at idle. This kit fits 2004.5-2005 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L LLY Duramax diesel.
Features
- Genuine Bosch fuel pressure regulator with mounting bolts
- Includes the intake tube, EGR tube and upper radiator pipe seals and gaskets
- Fits the 2004.5-2005 LLY Duramax
What's Included
- (1) Fuel Pressure Regulator, LLY (400653), with mounting bolts
- (1) Intake Tube Seal Kit, LLY (10016), pair of seals
- (1) Intake Tube Gasket (97306568)
- (1) EGR Tube Gasket (97303656)
- (1) EGR Tube to EGR Valve Gasket (97318478)
- (1) Upper Radiator Pipe Seal (94011604)
When to Replace
If your LLY surges at idle or runs inconsistently, the fuel pressure regulator may be the cause. Replacing the regulator along with the seals and gaskets you disturb to reach it helps prevent intake, EGR and coolant leaks after the job.
Before You Order
- LLY only: for 2001-2004 LB7 trucks, see the 2001-2004 Fuel Pressure Regulator Kit. For 2006-2010 LBZ and LMM trucks, see the 2006-2010 Fuel Pressure Regulator Kit.
Installation Tips
- Check the two o-rings on the outside of the regulator before installing. If they are damaged, replace them with the Fuel Pressure Regulator O-rings.
- Inspect the regulator wiring connector, and replace it with the Fuel Pressure Regulator Pigtail if it is damaged.
Related Parts
- Fuel Pressure Regulator Installation O-rings, Duramax
- Fuel Injector and Fuel Pressure Regulator Pigtail, Duramax
- Fuel Rail Pressure Sensor, 2004.5-2005
Frequently Asked Questions
Is the regulator a genuine Bosch part?
Yes. The kit includes a genuine Bosch fuel pressure regulator.
Are the regulator bolts included?
Yes. The mounting bolts come with the regulator.
Can I buy the regulator by itself?
Yes. See the 2004.5-2005 Fuel Pressure Regulator.
For warranty information, see our Warranty Policy.