Skip the auto shop - Our mechanics make house calls

Q: Engine coolant leak - 2000 GMC Savana 3500

asked by on

Glycol leak coming from shield pan that covers large gear of transmission behind oil pan and filter. Oil looks good and oil level. Transmission fluid also good. No transmission fluid in radiator. Top of engine dry no leaking hoses. Just changed oil and oil filter, air filter. Any ideas where it could be coming from? Thank you

My car has 150000 miles.
My car has an automatic transmission.

Hi and thanks for contacting YourMechanic. Looks like the coolant is coming from the rear freeze plug on the back of the engine. For this issue, I would recommend putting coolant dye in the cooling system and run the engine for a couple of hours, then check for coolant leaks with a black light and yellow glasses. This will make the coolant stand out really bright and you will be able to see exactly where it is leaking from.

If you need further assistance diagnosing your vehicle, then seek out a professional, such as one from YourMechanic, to help you with pinpointing your coolant leak.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Engine coolant leak - 2000 GMC Savana 3500

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: White smoke coming from engine after car is turned off

Hello, thank you for writing in. The symptoms you are having are classic of a failed head gasket. While it can be expensive and time consuming to check the condition of the new head gasket, it is very possible it...

Q: Truck turns over but doesn't start

It is quite possible that the fuel filter is what is causing your no start issue. If the fuel filter becomes clogged with debris, the fuel pressure at the fuel rail will decrease due to the restriction. If the fuel...

Q: Engine turns over but won't start

The ignition coil, ignition control module, or distributor rotor can all fail without warning, leading to a no start. The reason I am leaning towards an ignition system issue is that the vehicle was running before you went to the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...