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Bruce Bell

By Bruce Bell
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Bruce Bell New Member

Bruce Bell

Posted
Posted

Ok I have one for you...06 Silverado 2500HD LBZ Duramax.  Truck runs fine until towing up a long hill.  185 degree thermostats.  Recently towed a small tractor up Snoqualimie Pass in Washington, 50 degrees OAT.  Temperature starts climbing immediately at the slightest rise in grade.  Truck runs ok until near the top....temp rising to 226 degrees...engine falters and almost shuts down.  No response from the accelerator pedal and no response to manually shifting...will not shift gears.  Pull off the road and wait 5 minutes, then back to semi normal.  Thermostats are new, turbocharger is new, turbo vane controller new, transmission temp fine.  Have installed a boost pump...lift pump...new high flow air filter, new dual filter oil pump, fuel filter bypass.  Does anyone out there know anything about this..."survival" ..mode that the truck drops into..?? This has happened many times now....I also have a power chip on it...forgot the name of it...and its in the shop now.  When i step on the gas in all but economy mode, you would think i was a Navy destroyer laying down a smoke screen for the fleet.  Its just killing me...and my pocketbook.

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

Need to find out why it's heating up like that. I tow with a half ton and rarely see the needle move off 210°, aside from a very long grade on a 90°+ day.

 

I'd be checking between the radiatior, condenser, intercooler, & oil coolers for debris or being plugged, & I'd also want to know whether or not the water pump is spinning ...AND in the CORRECT direction. I've seen incorrect belt routing cause issues like this.

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