Check the Youtube video where the guy tapped and plugged the Tstat valve body. Probably your cheapest option at this point. Just search 6l80e T-stat delete on Youtube. The way it is right now I think the fluid will mainly be going thru the trans T-stat valve body and back to the transmission and mostly bypassing the trans oil cooler.
Did this fix on my truck 4 days ago and the steering has been quiet ever since. Thanks for posting this.
Just looked on Autotrader Mtn. View Chevrolet in Chattanooga, TN has a White 2500 LT Z71. So they are on the ground so to speak. Biggest thing I wasn't to crazy about was the wheels on the truck.
OK so update on the truck. They found a rodent nest under the fuse box on the driver side front wheel housing. They had chewed on the wiring going to the fuse panel and the chewed up wires where touching each other. The fuse panel was shorted out from rodent pee. New fuse panel and a bunch of replaced wiring and all is good.
I have a 06 2500HD 4x4 with the 6.0 170K miles. For the last week sometimes when you go to cut the engine off, I turn the key off and the truck keeps running. Cycle the key a couple of times and it will quit. Figured the key switch was going bad. But here's the kicker yesterday I start it up the 4x4 light flashes on and off for about 5 miles I make a stop. Get back in start the truck it is running rough cut it back off after several key cycles. Start it back up it runs fine but the 4x4 light still flashes off and on and now it won't shift out of first gear. Drive five miles back home in first gear 4x4 light flashing maybe once every couple minutes. Get home and have to finally pull the fuel pump relay to get it cut off, because it won't cutoff with the key. Thought the key switch was bad but now I don't know with the truck not shifting out of first gear and the 4x4 light flashing off and on??? Engine runs fine no reduced power. Never seen this before on any vehicle and I have driving almost fifty years. Idea's where to start??? Thanks
Had this TSB performed on my 17' 1500 today huge improvement!!! Thanks for posting this almost 18 months ago now. Had asked the dealer earlier about the backup camera being too bright at night, and you get this blank stare followed by it's what? The search function is a wonderful thing. LOL
Although my truck is a 17' it makes the exact same noise on a cold start first thing in the morning. I know your truck has a all new motor for the 19's , but I have read where it is normal for the 14-18 model truck's. Yeah I don't really like it either but they say it is normal.
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