Hi there, hoping to get some advice/answers on this puzzling issue...
A few days ago my 06' GMC LBZ began showing "Low Coolant Level" on the DIC (Driver Info Center), but the coolant temp was showing normal (195 degrees), so I checked the coolant reservoir and sure enough it was empty? I always check my fluid levels weekly and was surprised to see no coolant... so I poured in 1 full gallon of DEX/COOL coolant and drove the truck about 30 minutes. To my surprise the "Low Coolant Level" warning came back?
I then noticed some coolant dripping from under the truck and crawled underneath to see where it was dripping from.... coolant was dripping from the transmission weep hole near the front of the bell-housing! I poured in more coolant and sure enough it dripped out as fast as I poured it in!
Now I have not seen a bare Duramax block, but I am familiar with the older Chevy V8's that had coolant freeze-plugs in the rear of the block, but does the Duramax have the same thing?
Every time I put in more coolant, it drains out (usually when driving) but the engine never runs warmer than normal 195 degrees...then the "Low Coolant Level" warning comes on again.
I spoke with one guy and he said the Duramax has "Cover Plates" on the rear of the block that could be the source of the leak?
So far no one has been able to give me a definitive answer on what the problem is and what the repair will be. Hoping someone on this forum can help me out.
Thanks for taking the time to read this,