Question about 2000 GMC Jimmy

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Heater My 2000 Jimmy heater is only blowing cold air.

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  • buggybuster Dec 10, 2008

    heater blow cold air, could it be the blower motor thermal resister switch

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Hello,

I have a 1999 GMC Sonoma and I had this problem very recently, This is a common problem with your radiator.

- Something for you to check is and hour after your last drive (to let the engine cool down) open the radiator cap. Be careful. It may be pressurized and it may spray. If there is radiator fluid at the top, you should consult a mechanic. Otherwise a fix is easy:
- If there appers to be no fluid, simply find a friend to give you a ride and go to your local auto store (Canadian Tire, Partsource, or their american equivilents).
- Get a container (4 ltrs or 1 qrt) of 50/50 premix radiator coolant. Make sure it's a 50/50 premix. If you are unsure, as a clerk.
- Once you get home, pop your hood and open the radiator cap again.
- Pour the mixture in until it gets to the top.
- With the radiator cap off, start your engine. This will circulate the coolant through the engine. As it does, coolant will drain out of the radiator and into the engine block.
- You need to keep adding coolant to maintain a full radiator.
- When it looks like no more coolant is going into the engine, put the cap back on and go for a drive.
- Check that the heat is working. If so, Good Job!
- If not, you may have to consult a mechanic.

Hope this helps.

Posted on Sep 10, 2008

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