GMC SIERRA 1995 Manual page 295

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
2. Push it back in all the way, wait three seconds and then pull it back out
clean rag or paper towel.
again.
3. Check both sides of the dipstick, and read the lower level. The fluid
level must be in the COLD area for a cold check or in the HOT area or
cross-hatched area for a hot check.
4. 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.
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