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This procedure checks the transmission fluid level, as well as the condition of the fluid itself. Before checking the fluid level, perform the following: 1. Start the engine and park the vehicle on a level surface. Keep the engine running. 2. Apply the parking brake and place the shift lever in PARK (P). 3. Depress the brake pedal and move the shift lever through each gear range, pausing for about 3 seconds in each range. Then, move the shift lever back to PARK (P). 4. Allow the engine to idle 500-800 RPM for at least 1 minute. Slowly release the brake pedal. 5. Keep the engine running and observe the transmission fluid temperature (TFT) using the Driver Information Center (DIC) or a scan tool. 6. Using the TFT reading, determine and perform the appropriate check procedure. If the TFT reading is not within the required temperature ranges, allow the vehicle to cool, or operate COLD CHECK PROCEDURE 1. Start the engine and locate the transmission dipstick at the rear of the engine compartment, on the passenger's side of the vehicle. 2. Flip the handle up, and then pull out the dipstick and wipe the dipstick end with a clean rag or paper towel. 3. Install the dipstick by pushing it back in the dipstick tube all the way, wait three seconds and then pull it back out again. NOTE: Always use the proper automatic transmission fluid listed. Using IMPORTANT: Use the cold check procedure only as a reference to determine if the transmission has enough fluid to be IMPORTANT: Always check the fluid level at least twice. Consistent
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
4. Keep the dipstick pointing down and check both sides of the dipstick, and read the lower level. Repeat the check procedure to verify the reading. 5. Inspect the color of the fluid on the dipstick. Refer to Fluid Condition Inspection in this procedure. 6. If the fluid level is below the COLD check line, add only enough fluid as necessary to bring the level into the COLD line. It does not take much fluid, generally less than one pint 7. If the fluid level is in the acceptable range, push the dipstick back in all the way, then flip the handle down to lock the dipstick in place. 8. Perform a hot check at the first opportunity after the transmission reaches a normal operating temperature between 82-93°C (180-200°F). HOT CHECK PROCEDURE 1. Start the engine and locate the transmission dipstick at the rear of the engine compartment, on the passenger side of the vehicle. 2. Flip the handle up, and then pull out the dipstick and wipe the dipstick end with a clean rag or paper towel. 3. Install the dipstick by pushing it back in the dipstick tube all the way, wait three seconds and then pull it back out. readings are important to maintaining proper fluid level. If IMPORTANT: Use this procedure to check the transmission fluid level when the TFT is between 82-93°C (180-200°F). The ho t check IMPORTANT: Always check the fluid level at least twice. Consistent readings are important to maintaining proper fluid level. If
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
4. Keep the dipstick tip pointing down and check both sides of the dipstick. Read the lower level. Repeat the check procedure to verify the reading. 5. Inspect the color of the fluid on the dipstick. Refer to Fluid Condition Inspection below. 6. A safe operating fluid level is within the HOT crosshatch band on the dipstick. If the fluid level is not within the HOT band, and the transmission temperature is between 82-93°C 7. If the fluid level is low, add only enough fluid to bring the level into the HOT band. It does not take much fluid, generally less than one pint (0.5L). Do not overfill. Also, if the fluid 8. If the fluid level is in the acceptable range, push the dipstick back into the dipstick tube all the way, and then flip the handle down to lock the dipstick in place. 9. If applicable and if the vehicle is equipped, reset the transmission oil life monitor only if the fluid was changed. FLUID CONDITION INSPECTION Inspect the fluid color. The fluid should be red or dark brown. If the fluid color is very dark or black and has a burnt odor, inspect the fluid and inside of Fluid that is cloudy or milky or appears to be contaminated with water indicates engine LINE PRESSURE CHECK IMPORTANT: To assist in reaching the correct temperature range of 82-93° C (180-200°F), drive the vehicle in second gear at no more
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 2: Using Pressure Gage To Test Line Pressure SPECIAL TOOLS J 21867 Pressure Gage CHECK 1. Install a scan tool. 2. Start the engine. 3. Inspect the transmission for the proper fluid levels. Refer to Transmission Fluid Check. CAUTION: Keep the brakes applied at all times in order to prevent unexpected vehicle motion. Personal injury may result if IMPORTANT: Before performing the line pressure check, verify that the transmission pressure control (PC) solenoid is operating
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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