2005 Chevy Problems

[charles p]

I have a 05 Silverado Z-71 and my son has a Tahoe Z-71.  I just had to replace my transmission and torque converter at 83K miles.  His vehicle has about the same mileage and this year he has had to replace his torque converter, instrument cluster, and now both heads are cracked.
Are we having bad luck or it this a symptom of this GM date?
Was hoping to get a lot of mles from my truck since maintain it properly, I don't drive it much per year, and never drive it hard.  Should I unload it now?
 

[Dave in WV]

I have an 04 Silverado 1/2 ton 4 door with the 5.3L engine, I had to replace something in the 4x4 electronic control last year (55k?). I've had the cooling system flushed and serviced and the transmission fluid replaced once. The dash  blower fan motor control board would only work on high and that cost me $50 at NAPA. I know 2 guys with extended cab models that can't keep rear tires on their trucks. That's all I know of.

[Larry L]

Take them to the closest GM dealer and have the Service Manager refer to Technical Service Bulletin 06-06-01-019B


Some vehicles may experience a gradual coolant loss over time. A very low percentage of cylinder head(s) manufactured with an embossed Castech logo may develop a porosity crack in a very specific area.Inspect the cylinder head assembly to determine if the casting was manufactured by Castech. This can be accomplished by inspecting for their casting logo located on top of the intake port, under the rocker arm support rail and in the spring deck cavity portion of the cylinder head. Important: If the cylinder head(s) are Not a Castech casting, follow normal diagnostic procedures in SI to determine the cause of the coolant loss.
Refer to the following illustrations on how to identify Castech casting and/or the very specific areas of the cylinder head(s) for a coolant leak from porosity

[briarpatch]

I have a 2005 chevy impala, I know different animal from a truck but GM is GM. I had a leak that was supposed to be the heads and the dealers will lie you like a rug. The problem was that GM had routed the water from the block through the belt tensioning assembly with two plastic elbows that after about 70,000 miles deteriorate. These elbows are hard to see and the leaks look as though the heads are leaking. You tube saved me a bunch of money.