There is a plug on the upper side of the transmission that you remove and add lube to. This is best left to a professional who has a rack and the correct lube.
You can locate the transmission fluid in your 2004 GMC Envoy by using the transmission fluid dipstick. The transmission fluid will be in the transmission fluid pan.
Where do I fill the transmission fluid gmc Safari van?
how much transmission fluid dose a 2003 gmc yukon need
You use automatic transmission fluid.
The transmission fluid capacity for a 2000 GMC Jimmy is six quarts. Transmission fluid should be added slowly to because capacity can be reached rapidly.
Dexron-III Automatic Transmission Fluid
You add fluid the same place you check the fluid level. If you have a newer GMC the transmission may be a sealed unit with no place the check the level or add fluid.
remove the transmission pan
To the transmission. Down the dipstick tube.
same spot as the transmission dipstick
Transmission fluid is added to a 2003 GMC Envoy by removing the dipstick and placing a funnel inside the tube. Fluid is then added and the level checked periodically using the dipstick.
To change the transmission fluid on a 1964 V6 GMC truck, you will need the manufacturer manual.