On the driver's side next to the distributor; hard to get to.
That would be attached on top of the fuel pump/sending unit assembly.
No it does not.
R134a
Looking at it the one on the right
That would be the oil sending unit.
low radiator fluid or a possible bad thermostat.
Fuel pressure regulator is located on the driver side fuel rail.
location of the O2 sensor heater on a 1998 GMC 5.7
they are inside the front wheel hubs, on both sides.
How much fuel gets introduced into the engine
The 1997 Chevrolet Suburban 2500 has a 4L80-E 4-speed automatic transmission. It was are only used in Chevrolet and GMC vehicles.
I have a 1999 GMC Suburban with the same problem but it did not show up until I had removed all of the wiring harness from the engine for a cylinder head job. I am going to look at the throttle position sensor and wiring connector tonight.