01 gmc truck 1500 2wd oder of antifreeze inside cab
Smell of antifreeze in cab when i turn defroster on smell is gone after awhile.no visual signs of antifreeze in the floor of passenger side. truck has 140,000 miles. truck runs great. still getting over 20 mpg.
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Re: 01 gmc truck 1500 2wd oder of antifreeze inside cab
The small radiator just inside the cab, where the hoses go to the heater is leaking. You may try using stop leak (many don't recommend this) or take off the heater radiator. it will probably get worse when you turn on the heater and fog up the windshield if not fixed. hope this helps.
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Step 1: check to see if there is any leakage of coolant under the car, if so it could be a leaking hose or water pump seal.
Step 2: check to see if there's coolant leaking on the passenger side fire wall (inside the car) and to see if there is any fogging on the windshield when the defroster is running, or if there's smearing on the windshield, this would indicate the heater core is leaking and has gone bad.
Likely you are in the beginning stage of a heater core leak. at this point, you may be able to temporarily solve the problem by using a good system sealer (I'm partial to the kind that comes as a silver powder) Since we don't actually know the condition of the core, temporary may mean a week or several years, but replacement is expensive and time consuming so I'd definitely give it a try.
Chanses are that little hole will turn into a big hole its only a matter of time, its not that hard, don't be inteminated by it, even if you have never done one before. Chk. the carpet on the pasengers side floor see if its wet, anyhow if you can smell antifreeze thats what it is heater core.
You have a coolant leak most likely in the heater core. Try disconnecting your heater hoses and coupling them together, then running the engine to see if the leak goes away. If it does, I would have the heater core replaced.