The 2004 Jeep Wrangler has a 5-speed manual.
Approximately ( 2.8 quarts ) of Motorcraft MERCON automatic transmission fluid for the 5 speed manual transmission in a 2004 Ford Ranger
According to the 2004 Ford Ranger Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used in the 5 speed manual transmission )
Motorcraft MERCON - V automatic transmission fluid for the automatic transaxle Motorcraft Full Synthetic Manual Transmission Fluid for the 5 speed manual transaxle ( according to the owners manual )
Motorcraft MERCON automatic transmission fluid in the manual transmissions on a 2004 Ford Mustang ( according to the Owner Guide )
2.20 liters for the manual 5 cylinder 3.5 liter engine
Manual transmission lubricant type: MERCON autmatic transmission fluid - Haynes Manual #36071, 1993-2005 Ford Ranger Pick-ups.
The 2004 Ford Mustang owners manual shows : for the manual transmission used with the V6 - 2.6 liters (5.6 pints ) of Motorcraft MERCON automatic transmission fluid
If I am not mistaken a manual or 5 speed transmission doesn't have transmission fluid.
If you mean for a manual transmission, it calls for Mopar manual transmission fluid but it is very expensive. You can use Mobil1 10w-30 extended mileage oil as a direct replacement. About $7.75 qt.
17mm allen wrench, the transfer case takes a 10mm allen.
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.