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Why did my Chevy Suburban overheat on the Interstate?

Why did my Chevy Suburban overheat on the Interstate?

When our suburban began overheating, we were already on the interstate for about 2 hours, fully loaded with people & full of luggage with the A/C going full speed on a hot day when our gauge suddenly started climbing till we shut off the air conditioner, a dealer was at the next exit, & we immediately pulled off to have it checked out.

What’s the temperature of the engine in a Chevy Suburban?

Engine temperature went close to 260 by the meter in the dash. I tried to drive slowly but it did not cool. The way to get it cooling was to rev it up. No matter what speed I was moving the engine had to be running 3000 rpm for it to cool.

What happens to the canister of coolant in a Chevy Suburban?

Coolant expansion canister cap has a pressure valve built into it. Turning the cap just a couple turns will open the valve and let pressure safely out. At least mine did. After the coolant stopped boiling it all went into the engine and the ganister was empty.

Why is my Chevy Suburban not shifting into 2nd gear?

Sounds like you may have driven a slightly damaged transmission to the point that it can’t be repaired, and you need a new one. I had a 96 that was not shifting into 2nd gear (and also later found out reverse was out). Drove it less than a mile, and then had it towed to a transmission shop.

Why does my Chevy Suburban overheat when it’s Hot?

The other problem you might have is a blown headgasket, where exhaust gas is being pushed into the cooling circuit. This could heat up the coolant, as well as airblock the cooling circuit so you don’t get the coolant flow you need. A tell tale sign of this would be a radiator that wasn’t full of coolant when it was hot.

What’s the temp in my Chevy Suburban camper?

I passed an 18-wheeler going uphill the other day (without a trailer) and the temp got up to 245 degrees. My mechanic used a bore scope to look into the radiator and didn’t see any trash or other notable problems. My sub. has 139,000 and my camper weighs 7800lbs., and I don’t know which way to turn at this point. Any suggestions?

Coolant expansion canister cap has a pressure valve built into it. Turning the cap just a couple turns will open the valve and let pressure safely out. At least mine did. After the coolant stopped boiling it all went into the engine and the ganister was empty.

What kind of antifreeze do I use on my Chevy Suburban?

That dealer discovered something else that may be useful to you: When our water pump was changed by a (non-GM) mechanic for us a short time earlier, he mixed regular (green) antifreeze with the remnants of the pink DexCool coolant already in the engine.

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Ruth Doyle