Asked by Nov 17, 2017 at 11:33 AM about the 1999 GMC Sierra Classic 1500

Question type: General

I replaced the transmission filter &
fluid but only change from 1st to
2nd gear a couple times.  I let it
run for about an 1hour. What can I
do next. It's a 1984 gmc Sierra
classic 1500 v8

1 Answer


So you have it filled with trans fluid? Why did you run it an hour? Park on a level surface. Start the truck, let it warm up to operating temperature in park. Shift into all gears, R, 1, 2,3, 4 and back again slowly. Back into park, with engine still on, pull the transmission dipstick, wipe and reinsert, is it in the cross hatch area? Then your good to go. Too low, add a little at time, you don't want to overfill.

Your Answer

GMC Sierra Classic 1500 Experts

  • #1
  • #2
    David Tinnin
  • #3
    John Saffrahn
View All

Related Models For Sale

Used GMC Sierra 1500
178 Great Deals out of 12,034 listings starting at $1,775
Used Chevrolet Silverado 1500
160 Great Deals out of 12,130 listings starting at $1,895
Used Ford F-150
522 Great Deals out of 10,138 listings starting at $3,490
Used Dodge Ram 1500
53 Great Deals out of 490 listings starting at $2,495
Used Toyota Tacoma
30 Great Deals out of 1,345 listings starting at $6,900
Used Toyota Tundra
49 Great Deals out of 1,547 listings starting at $5,999
Used GMC Yukon
3 Great Deals out of 1,113 listings starting at $6,950
Used Ford F-250 Super Duty
19 Great Deals out of 787 listings starting at $3,500

Used Cars For Sale

2007 GMC Sierra Classic 1500 For Sale
8 listings starting at $7,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.