1994 - 2002 GM OBS Truck 6.5L Diesel PMD / FSD Tear Down Rebuild (Chevrolet GMC w/ Stanadyne 39405)

Описание: This video goes over my procedure for tearing down and rebuilding the grey Stanadyne PMD (pump mounted driver) model 39405. We also go over improvements during the rebuild to its reliability. The PMD is unique to the DS4 electronic injection pump equipped GM 6.5L diesel engines. Sometimes you will see the PMD referenced by GM as the FSD (or fuel solenoid driver) too. Both PMD and FSD terms refer to the same part. This particular component of the 6.5L diesel has an extremely high failure rate historically, regardless of whether you have the genuine Stanadyne one sold by GM, or aftermarket. They will all fail eventually, without improvements to heat dissipation. The best point to relocate the PMD from its factory mount on the injection pump, thermally for better heat dissipation, is the front bumper cutout area.

This video was inspired by the fact that Stanadyne discontinued and stopped manufacturing PMDs back in 2015. The grey model 39405 PMD was introduced in 2009. Remaining inventory of the grey 39405 model PMD is being sold only via Alliant Power under their number AP63486. Details of this announcement here: https://www.dieselforward.com/file/37...

The vehicle shown is a 1999 Chevrolet Suburban with the 6.5L Turbo Diesel engine option. It was upgraded to the latest Stanadyne PMD model 39405 which is gray in color, not black, in 2010 and has a revised Stanadyne factory wiring harness and resistor circuit board design to match. However, the procedure and rebuild shown is applicable to all grey Stanadyne PMD models across Chevrolet, GMC, and Holden as well as the earlier black PMD Stanadyne models. This approach can apply to aftermarket PMD suppliers such as Flight Systems as well (which uses the previous black Stanadyne PMD wiring harness). The GM 19209057 PMD you order as a replacement now is made by Flight Systems and can be applicable to this procedure as well.

Applicable to 94 95 96 97 98 99 and carry over model year 2000, 2001 and 2002 old body style (OBS) trucks and vans from Chevrolet, GMC , and Holden such as the Suburban Tahoe Yukon Silverado Cheyenne Sierra and Express.

The eBay and Amazon search links below are paid links, for which I may be compensated and earn a commission, if you choose to buy the parts and tools shown in this video thru them:

If you just want to buy a replacement Stanadyne 39405 PMD and not rebuild yours: https://ebay.us/Bfg7ne or https://amzn.to/3HxYVJR

Find new MJ15004G transistors in the TO-3 package at: https://ebay.us/s1XRV8 or https://amzn.to/3CyRlea

The MG Chemicals 832FX flexible black epoxy potting compound I used can be found at: https://ebay.us/Q5Gq7c or https://amzn.to/3kOsj4V

The adhesive thermal pads are a special order item from Parker Chomerics and part number 60-12-4511-1671, something you'll only find at www.digikey.com.

For the Permatex threadlocker green 29000: https://ebay.us/nDtba1 or https://amzn.to/3FstzST

The hot air desoldering station 858D I used can be found at:
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The vacuum desoldering gun ZD-915 I used can be found at: https://ebay.us/D6oKav or https://amzn.to/3ntiXNp

And the Aavid Thermalloy 8909NBG covers, or coves: https://ebay.us/rTPi5J or https://amzn.to/3oFcUVE

And if I've saved you some $$ here, consider some coins for the coffee tip-jar! https://ko-fi.com/drshock

1994 1995 1996 1997 1998 1999 2000 2001 2002

Chapters:
0:00 - Problem overview
1:20 - Removing the PMD cover
3:18 - Removing selected potting compound areas
15:38 - Removing transistor mounting screws
17:21 - Desoldering and removing the transistors
21:53 - Installing replacement transistors
34:56 - Re-potting the PMD
41:52 - Testing the rebuilt PMD

#drshock #65diesel #dieselsuburban

Disclaimer: DrShock, the alias for the human content creator for this YouTube channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle.