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...

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...

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...

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...

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...

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...

: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...