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zakruti.com » Auto & Vehicles » South Main Auto Repair
Cadillac ATS: No Heat Out Of The Dash

Cadillac ATS: No Heat Out Of The Dash

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Rating: 4.0; Vote: 1
I have a look at a Cadillac ATS that came in with a customer complaint of no heat. I also find out it has a code stored in it for insufficient coolant flow. A few quick checks and I find the root cause for the problem
Date: 2020-08-05

Comments and reviews: 10


Cadillacs are the biggest P in The a-sess to work on. I get at least 2 or 3 a month in the mix. I know them and work on them but nothing is easy. A lot of plastic trim covers and tight spots with corroded aluminum bolts that easily break when removing. I started working on the early 5. 7 engines. Nothing like them. Really nice engines. If anyone works are these new cars or Northstar engines, just be patient and order parts with the bolts and fasteners. It will be fine. Try to use OEM. Sometimes the a/c delco thermostats are made in China, so you could go with a stant which is a thicker heavier better quality at a better price. If the A/C delco parts aren't avail. for some reason Standard Motor Parts red line or Blue line work well. They are and excellent replacement part with high Q/C and they are located in Long Island City N. Y. They test the heck out of their products and change out aluminum to stainless steel internals for better longevity and function. Be well. Thanks Eric for the excellent video. Always good brother watching ur vids and getting some tips and knowledge. Appreciate it. Be well.
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Must be bad radiators installed by GM mine has only 70, 000 Miles and I just found my Radiator is leaking in the exact same location. I thought I was going thru a lot of antifreeze watched this video and then went out to check mine got it up to tempeture and checked it out and yep I could smell antifreeze and checked radiator and it is leaking in same place. Thanks to this video I decided to check my radiator and that was it leaking in the same place. ON a side note COME ON GENERAL MOTORS YOU CAN DO BETTER. THE JUNK YOU BUILD 70, 000 MILES AND A BAD RADIATOR YOU SUCK. NO MORE GM CARS FOR ME.
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In it's 24 years, my 96 Camry has needed a couple radiators. But replacements are cheap, come with a lifetime warranty, and take about 30 minutes to install.
A couple years back, I replaced a Pontiac G6 radiator in my driveway. It required pulling the entire nose and the headlights off. After all that, I still had just barely enough room to work. Removing and reconnecting each hose and line was a prolonged ordeal that helped stretch the job out for two days. Never again!

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UPDATE: The lady was contemplating getting a new vehicle and when she got the quote to fix the caddy she said it was time to make the purchase on the new one she was looking at. On a side note with the GM Strike that is still going on it was near impossible to get my hands on OEM parts. Oh well, ya win some ya loose some.
-Eric O.

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2: 40 I'm sure having to tap a button 20 times for 1 degree of change is not going to cause any driver distraction. Have they heard of rotary encoders? Oh wait, the radio has them, but the climate control is push-button only. That's a design fail.
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So the whole no heat out of the dash, coolant flow low dtc. The first thing I guessed was low coolant to the heater core. Same thing happened to my XJ last week when the tstat housing gasket failed and dumped a gallon of coolant down my skid plate.
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ATS cost about 40K new. After 6 years, it would be lucky to fetch 10K on trade-in.
Needs to pull the whole nose off to change the radiator, and can't get OE parts cause GM's on strike. That''s a Disposo-Caddy. I'll bet she buys another one!

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I've had pretty good luck with the old school bar's leaks. Ain't the right way to do it, but sure is the cheap way.
P. S. If you have to take the bumper cover off to pull the radiator, I'd make those GM engineers pee in the bottle.

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Check coolant! Is what I always say after a very cold trip many years ago in my old Alfa Romeo. It had very low coolant. Filled it up and boom Sahara summers day! But that was a much older and simpler car.
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Just wondering if Cad still uses that Astro-Ventillation System that won't allow air discharge into passengers compartment until sufficient heat is available to modulate the outlet temp?
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