2014 5.3l Silverado. I was driving home from the airport at normal highway cruising speeds, not driving aggressively, literally just cruising and the warning came up "Transmission Hot Idle Engine". It's 53 degrees outside so I know the outside temp has nothing to do with it. Anyone have this happen before? Trans fluid isn't dirty and is at normal levels.
Transmission Hot Idle Engine
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angelomarino10
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Yesterday it was getting up to 210 just driving around locally.
210° is the high end of normal operating temp. Excessive shifting with cause temps to rise some. Low fluid will cause temps to rise. Too low fluid temps contribute to lower fuel economy. That's why Dexron VI is recommended, its a low viscosity fluid.
Here is some info I saved on atf temps that may be of interest;
Here is some info I saved on atf temps that may be of interest;
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Thanks for the info Mike. I'm concerned because I never tow, the trans was serviced at 50k miles, fluid levels are fine, and this happened while cruising at 70mph. I'd understand if I had the trans under stress but this seems to have happened unprovoked. Worth the dealer looking at while it's under warranty still, IMO.
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UPDATE: Dealership just called. The technician "drove my truck for multiple hours yesterday" and only got the transmission temp up to 212. I called them out on that, no way a technician drove my truck for multiple hours when he has other jobs to work on. They said the main issue with my truck is the high pressure fuel pump needs to be replaced ($1238), even though I've never had an issue with that before and my check engine light wasn't even on when I dropped the truck off. They offered to let me talk to the technician, which I said yes to. After 2 minutes on hold they notified me my technician was on a "test drive" and would call me later.
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UPDATE: Talked to the dealer a second time. Turns out the technician "drove the truck for just over an hour", the trans got to 212F, and that's considered normal. I told them they are not authorized to fix my fuel pump, especially since I've never had an issue and they informed me I needed to pay a diagnostic fee for the fuel pump. I didn't ask them to fix anything in the fuel system, so why are they charging me a diag. fee for it? I darn well know they didn't "diagnose" anything, they pulled a code for the high pressure fuel pump and it told them it needed to be replaced.
Called GM Customer Service and opened a case. They are going to "try" to get my diagnostic fee back and they are elevating my case to a district manager to properly get my transmission diagnosed.
Called GM Customer Service and opened a case. They are going to "try" to get my diagnostic fee back and they are elevating my case to a district manager to properly get my transmission diagnosed.
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UPDATE: Picked my truck up from the dealership last night. The technician's notes stted he drove for just over one hour, 27 miles, and was unable to recreate my issue. On top of that, there's no diagnostic code in the history that shows anything going on with the transmission.
Well, I just drove 22 miles in just under an hour with 2 stops and my transmission temp got up to 230F.
Well, I just drove 22 miles in just under an hour with 2 stops and my transmission temp got up to 230F.
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That stinks. Sorry to hear the dealership is not acknowledging the issue.
I hope your contact with GM gets somewhere.
Or you can throw $185 at it and replace the thermostat and cooling lines to see if the problem goes away.
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I hope your contact with GM gets somewhere.
Or you can throw $185 at it and replace the thermostat and cooling lines to see if the problem goes away.
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Worse comes to worse I will. I am hopeful GM will fix this nonsense. Hooking my truck up to a diagnostic tool, writing down the codes, and not accurately diagnosing the issue really has me disappointed. I told them the original Trans Hot warning came after driving for 2 hours, from my house to Philly and back (which they know is somewhere around 50 miles).
We shall see how it goes
We shall see how it goes
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My fingers are crossed for you.
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I am sorry to hear all this nonsense.
My recommendation is that you find another Chevy dealership unless you are tied to that one for warranty. Not all service dept's are made alike and I've heard a story or two about having to drive twice as far to have it diagnosed properly. Another peice of advice is...Record everything...every detail. Time date bla bla bla...especially this last go around where you went home after picking up the truck from the dealership only to have the temp go to 230F.
Hope you get it fixed.
My recommendation is that you find another Chevy dealership unless you are tied to that one for warranty. Not all service dept's are made alike and I've heard a story or two about having to drive twice as far to have it diagnosed properly. Another peice of advice is...Record everything...every detail. Time date bla bla bla...especially this last go around where you went home after picking up the truck from the dealership only to have the temp go to 230F.
Hope you get it fixed.
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Thanks man. I am taking pictures and documenting it all. I am hopeful that GM Customer Care will find the proper way to get this diagnosed before my Powertrain warranty expires in May.
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UPDATE: GM's customer care manager called me today. They are unable to reimburse my diagnostic fee and the only option I have is to take it to another dealership to attempt a diagnosis. The manager then proceeded to tell me the reason my trans is running hot is more than likely because the high pressure fuel pump diag code appeared.
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I am lost...how do your fuel pump and transmission temp issues get fused together? Did GM sneak one by me by integrating the fuel/tranny cooling system together. :roll:angelomarino10 said:
These are totally unrelated...your response to take it to another dealer is the right answer though since you still have a warranty.
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Lol yeah that makes zero sense. And the fact they didn't tel you the reason for the correlation is bs.
Might as well just do the tstar delete and see if it fixes the issue.
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Might as well just do the tstar delete and see if it fixes the issue.
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I told GM there's no way my HPFP has anything to do with my tranny running hot nor have I noticed any issue that would stem from the HPFP being faulty. Their response was "well, I'm not a technician".
I'm waiting on another dealer to get a loaner car in so I can have them diagnose it. Trans got up to 198 on my 30 min/18 mile drive home just now. Temp outside is 55 with a steady rain. Obviously I'm not towing or have any type of load in the bed.
I'm waiting on another dealer to get a loaner car in so I can have them diagnose it. Trans got up to 198 on my 30 min/18 mile drive home just now. Temp outside is 55 with a steady rain. Obviously I'm not towing or have any type of load in the bed.
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Curious...has GM issued a TSB for the fuel pump or something. Maybe its on a future recall list or something. I think this whole fuel pump business is rather suspicious. How does anyone go in for a hot tranny temp and end up being told their $1238 fuel pump is bad. :roll: This definitely puts them in the stealership category.angelomarino10 said:
Look what I found
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Yep, after reading the voluntary emission recall for a bad fuel regulator in some 2014 L83 engines I'd say you found your reason why they were all over the fuel pump issue. Supposedly, some folks got a letter telling them their truck was on the suspect list.
I guess you didn't?
I guess you didn't?
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Well that's a good way to generate service department revenue
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I never got any letter stating anything about my fuel pump. It's funny because I've had it in there a few times and the codes never popped up.
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