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MAFIA MEMBER 106
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Discussion Starter #1
hey guys i got a FRIEND WITH AN 04 AND ITS THROWING A P0380 GP OR GPR CODE where are the glow plugs in the dmax are they under the v/c like a powerstroke? also if some one had some ohm specs that would be great
thanks steve
 

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Could very well be the glowplug controller. Its the little black box on the drivers side, rear top of engine, next to the fuel lines.

Also, could be a broken/frayed connection to one of the glowplugs. They are located in the same spot as a spark plug would be on a gasser. Check all the wired to the GPs, and also check the metal bar connecting them together.

BE VERY CAREFUL if you have to mess with the nuts on the ends of the GPs, or if you have to replace any of them. They can EASILY break off in the head. YOu have to soak them with PBBlaster and be very very careful when servicing.
 

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MAFIA MEMBER 106
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2,262 Posts
Discussion Starter #3
Could very well be the glowplug controller. Its the little black box on the drivers side, rear top of engine, next to the fuel lines.

Also, could be a broken/frayed connection to one of the glowplugs. They are located in the same spot as a spark plug would be on a gasser. Check all the wired to the GPs, and also check the metal bar connecting them together.

BE VERY CAREFUL if you have to mess with the nuts on the ends of the GPs, or if you have to replace any of them. They can EASILY break off in the head. YOu have to soak them with PBBlaster and be very very careful when servicing.
pb blaster love that stuff the truck fires right up even when cold just wanted to try and fix the bad one but i dont have the enhaced version for my AutoE scan to do chevy/gmc so do you have an ohm rating for the gp's?
 

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Got this from another site:
You can go to the tip of each glow plug individually with a test light connected to 12volts, or pull the right and left outer most plugs on the glow plug module and test each circuit white wires are driver side and red wires are pass side. this is for california spec truck, You will have to check at each glow plug for 49 stater.
Also:
Fed trucks it's usually the controller.
Cal trucks it's usually a glowplug (or 2,3...etc)
Here's the procedure from Alldata:

I hope you can read it. I cant get it to zoom out.
 

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Also found this:

Document ID: 2064397
#07057: Special Coverage Adjustment - Engine Glow Plug - (Feb 13, 2008)
Subject: 07057 -- SPECIAL COVERAGE ADJUSTMENT - ENGINE GLOW PLUG

Models: 2002-04 Chevrolet Silverado


2002-04 GMC Sierra


Equipped with 6.6L Diesel V8 (RPO LB7 - VIN 1) Engine; and California Emissions (YF5/NE1), or Clean Fuel Emissions (VCL)

Condition

Some customers of 2002-04 model year Chevrolet Silverado; and GMC Sierra trucks, equipped with a 6.6L diesel V8 (LB7) engine, and California emissions (YF5/NE1), or Clean Fuel Fleet emissions (VCL), may experience a condition where the engine glow plugs may fail. Failure of the glow plugs on these vehicles will cause illumination of the MIL. Also, depending on the ambient cold start conditions and the number of glow plugs failing open, some customers may also comment about hard starting, misfiring and white smoking after cold start.
Special Coverage Adjustment

This special coverage covers the condition described above for a period of 10 years or 200,000 miles (320,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.
Dealers are to replace failed glow plug(s). The repairs will be made at no charge to the customer.
For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after February 13, 2008 are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to February 13, 2008 must be submitted to the Service Contract provider.
Vehicles Involved

Involved are certain 2002-04 model year Chevrolet Silverado; and GMC Sierra trucks, equipped with a 6.6L diesel V8 (LB7) engine, and California emissions (YF5/NE1), or Clean Fuel Fleet emissions (VCL) and built within the following VIN breakpoints:
Year Division Model From Through
2002 Chevrolet Silverado 2E100004 2E306366
2002 Chevrolet Silverado 2F100004 2F244420
2002 GMC Sierra 2E100046 2E305909
2002 GMC Sierra 2F100034 2F244422
2003 Chevrolet Silverado 3E100006 3E378716
2003 Chevrolet Silverado 3F100003 3F259024
2003 GMC Sierra 3E100066 3E381049
2003 GMC Sierra 3F100146 3F259028
2004 Chevrolet Silverado 4E100143 4E219578
2004 Chevrolet Silverado 4F100082 4F174734
2004 GMC Sierra 4E100062 4E221355
2004 GMC Sierra 4F100094 4F174119

Parts Information

Parts required to complete this special coverage are to be obtained from General Motors Service and Parts Operations (GMSPO).
Part Number
Description
Qty/ Vehicle
97226202
Plug, Glow
As required
Customer Notification

General Motors will notify customers of this special coverage on their vehicles (see copy of typical customer letter included with this bulletin - actual divisional letter may vary slightly).
Service Procedure

Refer to SI for glow plug DTC P0380 (California RPO YF5, NE1, NF4, VCL) diagnostics; and replacement procedures.
Claim Information

For vehicles repaired under the terms of this special coverage, submit a claim with the information indicated below:
Repair Performed
Part Count
Part No.
Parts Allow
CC-FC
Labor Op
Labor Hours
Net Item
Replace glow plug(s): Left or Right Bank
Diagnosis Time
--
97226202
*
MK-95
T5695
0.6 each bank
Add: 0.0-0.3
N/A
Customer Reimbursement (US CAC)
N/A
N/A
N/A
MK-95
T5696
N/A
**
* The "Parts Allowance" should be the sum total of the current GMSPO Dealer net price plus applicable Mark-Up or Landed Cost Mark-Up (for Export) for glow plug(s) needed to complete the repair.
** The amount identified in the "Net Item" column should represent the customer reimbursement amount.
Customer Reimbursement - For US

All customer requests for reimbursement for previous repairs for the special coverage condition will be handled by the Customer Assistance Center, not by dealers.
A General Motors Customer Reimbursement Procedure and Claim Form is included with the customer letter.
Important: Refer to the GM Service Policies and Procedures Manual, section 6.1.12, for specific procedures regarding customer reimbursement and the form.
If the work was done by someone other than a GM dealership, the amount of reimbursement will be limited to the amount that the repair would have cost GM to have it completed by a GM dealership.
Courtesy Transportation

The General Motors Courtesy Transportation program is intended to minimize customer inconvenience when a vehicle requires a repair that is covered by the New Vehicle Limited Warranty. The availability of courtesy transportation to customers whose vehicles are within the warranty coverage period and involved in a product program is very important in maintaining customer satisfaction. Dealers are to ensure that these customers understand that shuttle service or some other form of courtesy transportation is available and will be provided at no charge. GM dealers should refer to the General Motors Service Policies and Procedures Manual for Courtesy Transportation guidelines.
February 2008Dear General Motors Customer:
As the owner of a 2002-04 model year Chevrolet Silverado or GMC Sierra truck, your satisfaction with our product is very important to us.
This letter is intended to make you aware that some 2002-04 model year Chevrolet Silverado; and GMC Sierra trucks, equipped with a 6.6L diesel V8 engine, and California emissions or Clean Fuel Fleet emissions, may experience a condition where the engine glow plugs may fail. This will cause illumination of the Malfunction Indicator Light (MIL). Depending on the ambient cold start conditions and the number of glow plugs failing open, some customers may also comment about hard starting, misfiring and white smoking after cold start.
Do not take your vehicle to your General Motors dealer as a result of this letter unless you believe that your vehicle has the condition as described above.
What We Have Done:
General Motors is providing owners with additional protection for the engine glow plugs. If this condition occurs on your 2002-04 model year Chevrolet Silverado or GMC Sierra truck, equipped with a 6.6L diesel V8 (LB7) engine, and California emissions or Clean Fuel Fleet emissions, within 10 years of the date your vehicle was originally placed in service or 200,000 miles (320,000 km), whichever occurs first, the condition will be repaired for you at no charge . Diagnosis or repair for conditions other than the condition described above is not covered under this special coverage program.
What You Should Do:
Repairs and adjustments qualifying under this special coverage must be performed by a General Motors dealer. You may want to contact your GM dealer to find out how long they will need to have your vehicle so that you may schedule the appointment at a time that is convenient for you. This will also allow your dealer to order parts if they are not already in stock. Keep this letter with your other important glove box literature for future reference.
Reimbursement:
The enclosed form explains what reimbursement is available and how to request reimbursement if you have paid for repairs for the special coverage condition. Your request for reimbursement, including the information and documents mentioned on the enclosed form, must be received by GM by February 28, 2009.
If you have any questions or need any assistance, just contact your dealer or the appropriate Customer Assistance Center at the number listed below.
Division
Number
Text Telephones (TTY)
Chevrolet
1-800-630-2438
1-800-833-2438
GMC
1-866-996-9463
1-800-462-8583
Guam
1-671-648-8450

Puerto Rico - English
1-800-496-9992

Puerto Rico - Español
1-800-496-9993

Virgin Islands
1-800-496-9994

We are sorry for any inconvenience you may experience; however we have taken this action in the interest of your continued satisfaction with our products.
General Motors Corporation
Enclosure
07057
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
__________________
 

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MAFIA MEMBER 106
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Discussion Starter #6
wow thanks you have made my day
steve
 
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