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<H1>6.6L LB7 Duramax Diesel Fuel Leak from Fuel Rail Pressure Sensor - fluid smoke #PI01312 - (08/20/2003)</H1>6.6L LB7 Duramax Diesel Fuel Leak from Fuel Rail Pressure Sensor


When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms. <A name=ss1-1370833><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1370833#ss1-1370833" target="_blank">

Fuel leak from the fuel rail pressure sensor<A name=ss2-1370833><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1370833#ss2-1370833" target="_blank">

Verify torque on the fuel rail pressure sensor is 70N·m(52 lb ft). An extension and a 1-1/16th inch crows foot may be required to torque the sensor. The crows foot should be kept at a 90 degree angle to torque wrench in order to apply the correct torque. Refer to SI document 676030 fuel line torque procedure for detail on torque procedures. You cannot get a socket on the sensor due to interference with the turbo.

If the leak continues after verifying the correct torque, replace the fuel rail pressure sensor gasket P/N 97329567.

If the leak continues after replacing the fuel rail pressure sensor gasket, replace the function block (supplied with fuel rail pressure sensor installed) P/N 97208076.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.<A name=ss3-1370833><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1370833#ss3-1370833" target="_blank">

(01, 02, 03 Chevrolet Silverado 2500 HD, 3500) and (01, 02, 03 GMC Sierra 2500 HD, 3500)

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Tech, is this the only fuel leak that you have seen on the DMax? I was changing the external trans filter yesterday and noticed fuel on the bottom of my oil pan and on the crossmember. Not a lot, but it was dripping. I will take the truck into the dealer in a couple of leaks to have this and the A/C problem addressed. Just wanted your thoughts on the fuel matter. Thanks!
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