1994 Chevrolet Suburban Owner's Manual - Page 274

NOTICE: Too much or too little fluid can damage your transmission. Too much can mean that some of the fluid could come out and on fall hot engine partsor exhaust system, starting a fire. Be sure to get an accurate reading if you check your transmission fluid. Wait at least 30 minutes before checking the transmission fluid level if you have been driving: 0 When outside temperaturesare above 90°F (32°C). At high speed for quite a while. 0 In heavy traffic -especially in hot weather. 0 While pulling a trailer. To get theright reading, the fluid should be at normal operating temperature, which is 180°F to 200°F (82°C to 93°C). To check transmissionfluid hot: Get the vehicle warmed up by driving about 15 miles (24 km) when outside temperaturesare above 50°F (IOOC). If it's colder than 50°F (IOOC), drive thevehicle in "D" (3rd Gear) until the ten minutes. engine temperaturegage moves and then remains steady for Then follow the hot check procedures. To check transmissionfluid cold: A cold check is made after the vehicle has been sitting for eight hours or more with the engineoff and is used only as a reference. Let the engine run at idle for fiveminutes if outside temperatures are 50°F (10°C) or more. If it's colder than 50°F (IOOC), you mayhave to idle the enginelonger. Should the fluid level be low during acold check, you must perform a hot check before adding fluid. This will give you a more accurate readingof the fluid level. To check thefluid hot or cold Park your vehicle on a level place. e With the parking brake applied, place the shift lever in " P ' (Park). With your foot on the brake pedal, move the shift lever through each gear range, pausing for aboutthree seconds in each range. Then, position the shift lever in "P" (Park). Let the engine run at idle for three minutes or more. Then, without shutting offthe engine, follow these steps: 6-29