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  1. Transmission Shop
    I recently picked up a second farm truck(2007.5 2500HD). It appeared to have a decent transmission leak coming from around the front of the pan near the bell housing when I bought it. Last week I dropped the pan and replaced the filters and gasket. While doing so I noticed a scratch on the...
  2. 911 Problems Forum
    on my way home i smelt a lot of coolant the coolant add sign came on the dash and the truck started getting hot so i pulled over and find this coolant leak busted and no coolant in the truck does anyone know what line it is called or how to buy one and why it busted was the turbo getting hot? i...
  3. 07.5-10 LMM Duramax Powertrain
    I have a 2009 LMM Duramax deleted and tuned with a fass fuel system. It will go into limp mode from time to time but leaves no codes in it besides P02B9 this last time it did it. The shop that just did injectors in the truck said it was do to water in the fuel. They have cleaned it out since and...
  4. 04.5-05 LLY Duramax Powertrain
    Mechanic reports seals leaking, fluid low, wants $2,000 to r&r seals. Does this sound reasonable? Disabled USMC vet needs some advice.
  5. General Discussion
    So I recently bought a 2003 2500hd 6.6L duramax. I didn’t have problems in the beginning but then I noticed when decelerating there was a low wind down hum. (Don’t know if this is connected) Found out I was low on transmission fluid... REALLY low. It took a whole quart and still isn’t full...
  6. 04.5-05 LLY Performance Parts Discussion
    Hi everyone, I have a stock 05 LLY Sierra 2500HD. I was changing out the thermostats when I noticed an oily soot build up down from where the EGR intake manifold connects to the engine. Is there a gasket that should be replaced there and is it as simple as unbolting the manifold at that spot and...
  7. 911 Problems Forum
    I have a 2003 extended cab lb7. It has a custom 5in aluminum driveshaft. I discovered the output shaft seal was leaking. I decided to change the seal and the slip yoke. It’s leaking just as bad now with the new parts. No vibration, doesn’t seem to be any unnecessary play anywhere, slip yoke is...
  8. 01-04.5 LB7 Duramax Powertrain
    I’m new to the duramax world and have an 02 2500 Silverado just found out the transfer case is leaking when I went to drive today I know of the pump rub issue but don’t know much of the signs from it I have some pictures and to me it looks like the where the 2 cases meet the main gasket is...
  9. General Discussion
    I recently bought an 05 LLY with 250k, owned for about two weeks and I noticed puddles of dexron near the driver side front tire. The strangest part is that it’s not an everyday occurrence. Some days it leaks, some days it doesn’t. Sometimes it’s a decent sized puddle, sometimes it’s a few...
  10. 04.5-05 LLY Duramax Powertrain
    I know this question has been posted in varius forms and forums, but i have added to many variables into the equation to immediately jump to a head gasket leak. The truck is a 4.5 2500hd gmc, mods that might have influence on the issue are, sinister egr delete, and banks intercoolers. The truck...
  11. 04.5-05 LLY Duramax Powertrain
    I’ll start this off by saying I haven’t heard this truck run yet. LLY. Doesn’t prime. I believe there’s air drawing into the fuel system. Previous owner replaced fuel tank, sending unit, fuel lines up until where they turn up at the fire wall under the cab, filter housing and has a cat filter...
  12. 01-04.5 LB7 Duramax Powertrain
    Woke up this morning and realized I have oil covering the undercarriage and tailgate. Checked all plugs and filters and fluid levels. Oil is way low. Started checking around the motor and found no leaks. When I got under the truck to look around I found a broken part. I have no idea what it is...
  13. 01-04.5 LB7 Duramax Powertrain
    Hey guys, recently put my truck on a lift to check my t case and diff fluid's. Found the t case and rear diff to be completely empty! Just bought the truck about a month ago. I was trying to diagnoss the squawk which i found to be the commom problem with the yolk. I filled the diff and t case...
  14. 04.5-05 LLY Duramax Powertrain
    I have had this truck for almost a year. 130K. please see picture of coolant leak. is that the oil pan? I don't have much experience and appreciate all replies. leak started off intermittent, now just dripping away.
  15. 04.5-05 LLY Duramax Powertrain
    Well, I finally tracked down WHERE the fuel leak I was smelling in the cab was at... Sort of. It appears to be around injector #4. It doesn't happen until I take the truck out on the road. Clean engine going out, covered with fuel when I get back. I replaced the return line, no help. I...
  16. Suspension&Steering
    Hello, I need a schematic of the power steering system. I've got a leak on the part behind the brake reservoir. there are 2 high pressure lines and a return line going to it. It is leaking at the joint between this mystery part and the brake res. I believe it is a booster unit for the brake...
  17. 01-04.5 LB7 Duramax Powertrain
    Am I just paranoid?? So it started as a small leak between the tranny and engine. There was also a small leak next to my spin on filter this little aluminum tab thing (not sure what its for). Leak stopped fluid level is perfect but I can smell transmission fluid when I step out of the truck...
  18. Exterior
    Need some opinions here. I am purchasing and installing myself a set of cab lights on my 03 GMC 1500HD. Read a lot of different posts on the subject. After everything I've read on here, seems like most people have trouble with leaks on both Recons and Pacers. I am leaning toward OEM GM cab...
  19. Exterior
    Somebody help me out here - I was pretty set on Recon Lights until someone told me they had a leak problem. The leak is between the actual lens and base of the light, not around the hole that drilled to install the light. Anybody else had this happen? I am trying to decide between Recon and...
  20. Introductions
    Hello there. Just bought an 06 Chevy silverado 2500hd with a 10" lift and 39 1/2" tires. It has the 6.6l diesel engine with allison transmission. I love it so far except that I have a concern about oil leakage. I thought it was loose bolts but after tightening all the bolts I could find in...
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