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1-12 of 12 Results
  1. 2001 - 2007 (GMT800) Non Powertrain
    I've got a coolant leak again. Its the same leak I've had before. I had the issue late last summer early fall. While the truck is running, it doesn't leak. But if I leave it sit off for a few hours after running for a bit, it leaks a few quarts out of the weep hole on the water pump. I had the...
  2. General Discussion
    I have a 07 chevy lbz with 86k miles on it, and im leaking coolant slowly, i thought it was from heater core adapter coming out of the fire wall but its not, its not the egr because that is fully removed, its not the heater core line and nothing els i can see on top of the engine. I can see...
  3. 06-07 LBZ & LLY Duramax Powertrain
    I wanted to see what y’all think. I just had HG replaced, engine studded, water pump replaced and oiler cooler gaskets done. Now I noticed it’s dripping from here when I stop and shut it off. I did have a coolant low 2 weeks after the shop visit added coolant seems good now. Even the hose...
  4. 11-16 LML Duramax Powertrain
    I have bad coolant leak wich I think is internal. I get lots of white smoke out of exhaust but it occurs only time to time. Add coolant light comes on about every 200 miles. I really dont think its cylinder head related because i get normal pressure in top radiator hose in every situation and...
  5. 2017-19 GM T-K2 Platform Powertrain
    Hello all , I have a 2018 3500hd dually, we use for hauling. truck has 169K miles on it now. have done every possible recommended maintenance on truck since new in 2018! followed everything per GM ! Recently about 3,000 miles ago had to replace turbo due to veins sticking! after turbo was done...
  6. General Discussion
    Hello, i’ve got an lbz duramax leaking about a gallon of coolant into the crank case in 5 minutes. I’ve been doing a bunch of research and have seen it can be the water pump and head gasket. i’d like to think it’s the water pump but it was just replaced 3,000 miles ago. I had a shop diagnose it...
  7. 11-16 LML Duramax Powertrain
    Hey all, got a wierd one. Dead stock 2012 LML just hitting 93k on the odometer.Threw a Tstat code on me. So I changed out my thermostats last week without any issue. Swapped them out, buttoned it all back up and topped off the fluid. Codes gone and good to go. I drive it for a few days no...
  8. Maintenance
    So I have a leak in my lower coolant, hose and while I’m still waiting for the replacement o ring to come in I need some help with the reinstall,alongside the original o ring was this plastic circle unfortunately when they fell out I didn’t get to see the order they go in so I don’t know if that...
  9. General Discussion
    Have a 2011 lml experiencing low coolant. First started after driving a couple hundred miles knowing the coolant level was where it needed to be. Gradually got worse over time, but no change in performance. Recently had a large drop in coolant but the truck had been sitting for a good while as...
  10. 06-07 LBZ & LLY Duramax Powertrain
    I've had to to add a 1/4 of a gallon of coolant to my truck twice in the past 2 years (both times in February). The last time the Check Coolant warning came I let the truck sit in 30 deg weather to cool down and I still couldn't remove the cap due to all the pressure behind it. I had to use...
  11. DIY and Tech discussion
    I just changed my leaking transmission lines on my new body Silverado with only 41k miles. I disconnected the lower radiator hose from the radiator to get more room. The connection is the plastic one, it looks like spines fitting together with a clip. The job is finished and now my connection is...
  12. 911 Problems Forum
    :help I am new to this forum and GMC's. I bought a 2007, 3500 classic with 67K miles on it in May from a Texas dealer. 4 days ago I noticed coolant dripping - from radiator area. I can't pinpoint the leak. Looks like my 100K GM warranty may not cover this. Any info on whether this is a trend...
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