I HAVE A 2001 GMC YUKON WITH 90000 MILES

2001 GMC Yukon

Tiny

Andrew24

June, 30, 2006 AT 4:26 PM

I have a 2001 GMC Yukon with 90,000 miles.

A couple of weeks ago, the truck started but instantly cut off by
itself
as if it wasn't getting enough gas or something. I had to start it
thrice before it stayed started.

Also, I put the driver side window down (power-windows) and it wouldn't
come back up. I cut the truck off, waited for about 15 minutes and it
worked this time.

One other peculiar thing was that one day when I cut the truck off, the
radio, which will usually continue to play unitl I open the door,
instantly cut off and then this week as I was driving (the startup
lights in the dash came on as if the motor was being turned off), the
truck jolted a bit and then it kept going. This happened about a
half-hour or so later again before I got home and parked it.

Thanks in advance for any help you can give.

1 Answer

Tiny

tygerof2

September, 3, 2006 AT 2:09 PM

Is your A/C system a 134a or R12? If its a 134a system, you have to remember that the pressure temperature relationship between the two different refrigerants is quite different. For example, on a 134a system, an evaporator pressure of let's say 35-40# will net you a suction temp of40-45 degrees. While an increase to 50# will get your suction temp to approx.54 degrees.

On the other hand, the old r12 has a much better capacity. The same scenarios: 28-32# nets you a 30-35 degree suction temp. At 40#- 45 degrees.

For an indepth look at the real differences go to www. Refrigerants. Com/catalog. Pdf

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