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Pulled and cleaned. It really was pretty clean, very little oil inside, most of what was on it was around the 2 port holes.

Is the CDR serviceable?

Thanks for the info. If I understand correctly, it will be an oil consumption issue? Am I still ok to drive and tow my boat? (not more than 5000 pounds dry weight and trailer) Thank you

1996 GMC 6.5 3500 2WD. 235,000 miles. Love my truck. At about 214,000 replaced the water pump with the high output and a Duramax fan after blowing a heater hose. Truck ran for about 5-6 minutes before I could get off highway and temp gauge spiked to the max. Replace heater hose refilled...

Thank you! The sensor was bad. quick and easy fix.

UPDATE: This truck does have an electronic speed sensor on the rear of the transmission. Inexpensive part, easy swap, speedometer working again. I'm sure it is coincidental, but the ABS light went out and has not come on since then either. Thanks for the replies and suggestions all!

1996 6.5 Diesel, 5 speed manual, 242,000 original miles. Transmission built twice now at 130K and 225K. Not sure if this is all coincidental, but all 3 of these components are giving me issues. Started with the washer fluid pump not working, then the ABS light is on with an occasional shake...

Thank you! it is the line attached to #2 in the diagram. How far down is the other end? I have already relocated the PMD (with a heat sink) Thanks for the diagram and explanation.

Hello! 1996 GMC 6.5 Diesel. 225,000 miles. Have recently discovered a small fuel leak from the 1/4" fuel line going into the mounting block for the PMD. my question is how far down the valley is the other end of that line? I am going to remove the manifold and snip the end off the current...

I did not replace the rag joint on the column....sounds like that is my next step. Has anyone adjusted the small set screw on top of the steering box? ran across that recommendation on YouTube.

1996 6.5 diesel. Very loose steering, lots of free play. Also feels very heavy at slow speed turning. Any suggestions before taking to the shop. Side note: entire front end was rebuilt about 10,000 miles ago.

I had no idea that my blow by question would generate this much conversation! And...sbrannon81, it is an addiction. There is not a 12 step program around that helps.

Hello, I still haven't used any of this yet. I have only driven this a minimal amount this summer. I am planning to add on my next oil change.

Are all the comments about related transmission issues on automatics? I have the NV4500 5 speed in mine.

I installed mine last summer with the same variances. I emailed LeRoy diesel and he said he had not noticed that before. So far, I have not had any issues. still runs 20-25 degrees cooler than with stock pump and fan.

Thanks, it has always been reliable, but it is now time to take it up a notch. I've owned it for 18 years. I haven't always had any extra money for anything besides needed repairs. Now I am in a position to spend some money on things to make it better!

I have been following/buying parts from LeRoy Diesel for the past 2 years. one of his recommendations is to replace/upgrade the Harmonic balancer and pulley with a solid one he sells. I ordered the 2 items from him and finally after it sitting in my garage got around to installing. Should...

👍 thanks

So, it looks like a pin hole leak in the thermostat housing gasket