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3

As far as the 4wd thing goes, this is normal operation when on dry pavement. You are actually causing the transfer case to bind. This happens when the steering is hard over. The bind comes from the difference while you are turning from the front wheels to the back wheels. The transfer case is designed for the vehicle to go straight. You shouldn't notice it ...


2

I think you are misunderstanding the reading on the stick. The Hot mark doesn't mean the fluid is overly hot... That is the full mark when the fluid is hot (which is normal). Transmissions are supposed to be checked after the engine is up to temperature and has been driving a while.


2

Reading hot on the transmission dipstick after driving is normal. As to the ABS light they could of damaged wiring while doing the brakes but it's unlikely. Reading ABS codes requires a scantool capable of talking to the ABS computer.


5

There are three places I can think the water would be flowing out of from the back area of the engine. The engine in your Yukon should be the GenI Small Block Chevrolet (SBC) engine (I believe they started putting LSx motors in them in 1999). The SBC has water passages through the intake manifold at the front and back of the engine. If one of these passages ...


5

On the 97 Sonoma the controls are electronic and send a signal to a vacuum switch block which will send vacuum to various valves. This is from a corvette but is similar. While the switches on the control panel can fail more commonly the vacuum lines, check valve or vacuum reservoir will fail first. Locate the vacuum source line and measure engine ...


3

Heck yeah! Short answer: Replace the check valve. Long answer: There is a check valve between the vacuum reservoir and the rest of the system. What that does is help the vacuum reservoir hold more vacuum. Your engine won't have enough vacuum "force" to move the heating ventilation doors without the reservoir. The check valve is that little black and ...


0

with the car running, use an aerosol can of carb cleaner with the straw in it to spray around the vacuum lines and fittings. When you get to the leak point you will hear the rpm change. move slowly and use spurts.



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