To find the specific solenoids you're looking for (e.g., shift solenoids, pressure control solenoids), you'll need to:
1. Consult a repair manual: A factory service manual or a Haynes/Chilton manual specific to your 1994 Chevy Suburban 4x4 with the correct transmission (e.g., 4L60E, 700R4 - you need to know your transmission type) will show you diagrams and instructions on how to remove the transmission and access the solenoids.
2. Identify the transmission: Knowing your transmission's model number is crucial. This is usually stamped on a tag on the transmission itself.
Once you have the manual and know the transmission type, the manual will precisely show you the location of each solenoid within the valve body of the transmission. Attempting to locate these without a manual is strongly discouraged. The transmission is a complex piece of equipment, and working on it without proper knowledge can cause serious damage.