1995 GMC Sonoma Owner's Manual - Page 233

To check trunsmissionfl~lid cold: A cold check is made after the vehicle has been sitting for eight hours more with the engine off and is used only as a or minutes if outside temperatures reference. Let the engine run at idle for five are 50°F (10°C) or more. If it's colder than 50°F ( 10°C), you may have to idle the enginelonger. Should the fluid level be low during a cold check, you must perfolm a hot check before adding fluid. Thiswill give you a more accurate readingof the fluid level. To check the fluid hot cold or Park your vehicle on a level place. Keep the engine running. With the parking brake applied, place the shift lever in PARK (P). With your foot on the brake pedal, move the shift lever through each gear range, pausing for about threes e ~ ~ n d seach range. Then, ia position the shift lever in PARK (P). 0 Let the engine run at idle for three minutes or more. Then, without shutting off the engine, follow these steps: 1. Flip the handle up and then pull out the dipstick and wipe it with a clean rag or paper towel. 2 . Push it back in all the way, wait three seconds and then pull it back out again. 6- 15