Engine block heater?? - Page 2 - Chevy and GMC Duramax Diesel Forum
07.5-10 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #11 of 12 (permalink) Old 10-06-2019, 09:09 PM
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Originally Posted by jakep4401 View Post
Just out of curiosity maybe you can help me solve this. On my truck when im going up hill sometimes it seems like ny truck just shakes like maybe it needs to downshift. It has 160k miles but i swear i thought an allison should go longer than that on a stock truck. I'm thinking maybe i need to grease to U joints and probably need change the tranny fluid. Its still red and has no burnt smell but the filter on the trans looks kinda old. But i have read that if you have never greased your U joints it could cause kind of a shaking type feeling. And this felling really only happens when im going up a sorta hill most of the time and going around 45-65mps. Any thoughts?

Lmm Guy
Sorry I really can't help much with that one. I'm still somewhat of a newb to the Duramax/Allison world. Seems to be a pretty common occurrence, but that said. U-joints that are that old are likely shot. Can probably say definitely if you tow heavy a fair amount. They take a ton of abuse. Had to replace them on my old 2011 at 140k miles.

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post #12 of 12 (permalink) Old 10-17-2019, 08:45 PM
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GM Program #:
Date Issued:
Oct 15, 2019
Program Title:

Enable Diesel Engine Block Heater - Exp. 11/30/2021

Program Description:

Certain 2017 - 2019 model year Chevrolet Silverado 2500/3500 and GMC Sierra 2500/3500 vehicles, equipped with the 6.6l Duramax diesel engine (RPO L5P) and optional engine-block heater cord, may have a condition in which the block heater cable function was disabled.

Repair Description:

Dealers will replace the engine block heater and cord.

“Insanity is doing the same thing over and over again, but expecting different results.” - Albert Einstein

2017 2500HD GMC Denali CCSB
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