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I've got an att. Oil is leaking from under it, near the area of the return line. I don't think the oil is dripping from the return connection. Also, I'm not certain, but I think there is a clunking sound, like a bearing possibly going out, but I can't really isolate it with all the background...

I have a'99 Chevy 6.5 turbodiesel. It has a 4L80E transmission. Started truck, slipped into drive gear, released foot from brake petal, started to roll forward, and then the back end locked up and the truck skidded to a stop. Transmission will shifted through all gears with no problem, just...

Can the CDR valve be cleaned and reused? At $40.00-60.00 a pop, if it can be reused, I would like to know how. Or, if it can't be cleaned and reused, is there a reliable, cheaper aftermarket part?

I've got fuel dripping from the bell housing hole and from areas around the interface between the block and bell housing when the truck is running. It took awhile to figure out what the fluid was because it was a small leak, and seemed weaker than diesel (watered down). I've exposed the...

After eliminating all the usual suspects to a series of random no starts, I came to the conclusion that a failing VATS was the cause. No sense in replacing parts to this useless system...I heard, from this forum, that one can eliminate the VATS with a PCM tune. Since I, supposedly, already...

Let me describe the scene... Used the vehicle for approximately 60 miles on a warm day with several shut down stops. After the last stop (approx. 10 mins.). Vehicle would not start (turns over, but won't start). After about 10-15 mins. and 5-6 start attempts, vehicle started, and I drove 30...

I have a 1999 Chevy 6.5, with the PMD mounted in the bumper with the extention cable. How long can one expect the PMD to work properly, until replacement is necessary due to "old age"?

Replacing my stock harmonic balancer with a fluidamper. Would like to replace my crankshaft bolt as well (l don't know how old it is). Where can I get the correct bolt? I'm sure it is a difficult to find item.

Need to replace my rear main oil seal. It will be my first time for such a job on this vehicle ('99 6.5 turbo diesel Chevy 3500). Can anybody point me to a start to finish procedure? Video would be great. I looked around here, but didn't see anything.

Need to replace my ignition switch harness. Can't see how to remove a little white plug located on top of the tumbler. It is part of the harness, so it needs to be removed.

Switching out my ignition switch harness. Been stymied by a little white plug that is located on top of the tumbler area. It is not of the norm. I do not see how to remove it, and would rather seek advice than to break it and cause more issues. Since it is part of the harness, it has to be...

Truck is garage kept. Cold day. Started right up (all normal). Warmed truck up and started on my way. Less than a quarter mile away, the engine stops as if someone turned the key off. Made several attempts to restart. Truck would crank, but not start. When turning key on, the fuel gauge...

From the modifications that I have done, what can I expect to tow (total weight) consistently and reliably?

l'm going to need to replace my water pump. Looked for background in the reference area, but found none. From what I can tell, many plates come off. Seems to be more work than is needed to R/R a water pump. Anybody have good instructions, pictures, video?

I need to pull a fifth wheel (15,000lbs) a thousand miles. My water pump just went out. It was the stock high output type. For my purposes, will replacing with the stock variety be fine, or is there a better one out there?

As far as I know, to remove the fan clutch, you get a 2" wench, hammer and whack the wrench to the passenger side. Mine will not release. Am I correct in the removal procedure? Is there a holding tool or procedure? Or, are the threads reversed? This is the first time to remove this in this...

Is there a bleed valve on these trucks for burping the new coolant? If so, where? If not, what process is used to rid the system of air. I ask because this will be the first time (for me) to do this maintanence on this truck, and I don't want overheating issues due to air. Also, I have never...

I need to enhance my cooling ability. I have heard about the mod involving the Dmax fan. But, I have never heard about what fan clutch to use. I have the HO water pump, and a spin on (one large nut) fan clutch. I was given part numbers for a fan and fan clutch (fan 15-80690, clutch 15-4691)...

Going on a 1000 mile trip pulling an RV. Need to change the fluid in the trans. and rear differential. Truck is fairly new to me, have not done these jobs before. Need to know the best fluid types and amounts. Thanks.

background: installed A Team Turbo. Left boost solenoid plugged in. Started truck, seasoned turbo using the stock ECM. Truck ran just fine. Swapped out the stock ECM with a KOJO tuned ECM (so I'm told) through Leroy Diesel. I followed KOJO's installation instructions to the letter. Now...