1999 GMC Sierra: harsh or hard shifting

6 of the 600 complaints about the 1999 GMC Sierra describe harsh or hard shifting.

owner complaints: 6
of this car's complaints: 1%
recalls: 0

Is there a fix? 43 service bulletins cover this area of the car. See below

Harsh or hard shifting by model year

2017
3
2010
1
2007
1
2005
1
2004
5
2003
13
2002
2
2001
1
2000
5
1999
6
1998
1
1997
3
1996
3
1991
1

What owners say

Filed Sep 6, 2005 · Transmission · 60,000 miles · OH

Dt: 1999 gmc sierra 1500. While driving the truck for about 45 minutes to an hour and if stopping at a stop sign or red light the truck will not shift from first gear to second gear properly. Once the truck does shift it is a very hard shift, and if on wet or slippery surfaces the truck will squall the tire. This started around 60, 000 miles. This does not happen every time, it is hit or miss. While pulling across three lanes of traffic the truck shifted properly and was almost hit by on coming cars. Took vehicle to the dealership, and they said it was the transmission. It was a common problem with gmc trucks. There is a kit that is made to fix this problem, but transmission must be replaced and the repair cost is between $700 - $1,800. This happens 4 to 5 times a week. *ak

Filed Aug 21, 2002 · Brakes · GA

While driving ABS light will stay on, and ABS motor will make a loud clunking noise.

Filed Apr 6, 2001 · Acceleration, Transmission · MS

Throttle body sticks while driving. Had built up dirt and varnish. This caused vehicle to lunge forward when pressing on pedal. Drivetrain makes a clunking noise due to a lack of lubrication. This can cause teeth not to mesh correctly

Filed Dec 13, 2000 · Transmission · AL

Main complaint is transmission. Took vehicle in at 6000 miles and told dealer about downshifting problem and major clunk or bumping noise after downshifting after starting from near stop. Also reported hard shifting. Dealer reports scan ECM system no trans codes and roadtested results show operating as designed. Door lock bezels falling off. Dealer replaced. This was 10/20/99. Took vehicle back in with 17102 miles on may 5/2000. Complained of rattle in pass. Door. Was reported that rear seat belt holder not fastened. Replaced guide and cover for safety belt. Rattle in pass. Door showed regulator loose from door skin. Tightened and aligned . Ask for check in noise in driver's window, going down, results were operating as designed. Ck. Bump in rear on accl. Results on checking drive train: operating as designed. Condition normal. Ck. Brakes acts as if don't want to stop times. Results were operating as designed. Still not happy with brakes! Right tire found to be not round. Replaced. Taken to dealer on nov. 8/2000. Accl. Sticking at top position. Throttle body sticking and replaced per bulletin[which I never recieved] . Had labels placed on vehocle about caliper when replacind disc brakes on vehicle. Check trans. Downshifts after coming to stop then accl. Makes tripple bump and hard shifts. Scan system found no codes: operating as designed. Trans. Still not right or shifting right and bumping! Door lock bezels falling out. Checked bezela and aligned. Owner reported sounds like only one horn functioning. Low volume results showed horn operating as designed. Not happy, they seem to think I'm stupid. Repeat complaints all ignored except horn. It was fixed!dec. 8/2000tran.

Filed Sep 14, 2000 · Transmission · NV

Went to dealership talk about techical service bulliten #86-74-03 clunk upon acceleration(replace transfer case fluid). Dealer changed transfer case fluid, but glunk noise is still there. The service bulletin states cause maybe to slip-stick condition between the rear propeller shaft slip yoke and the transfer case output shaft. The correction, drain the transfer case fluid and refill with fluid. This fluid contains a friction modifier thar should eliminate the slip-stick condtion. I feel that this service bulliten procedure did not correct the cluck problem. I said, to the technical manager that there is excess backlash between the crown-wheel and pinion in the diff. Pull it out and adjust it, as it will shorten the lfe of diff. He stated that there is no room to adjust it. I have a 1992 model that makes a clunk noise. I think my ujoints are being effected because of the backlash. I place my truck in drive then reverse I get a slight clunk feeling. Iam not a expert, but I don't think the tsb really corrects the clunk.

Filed Jan 7, 2000 · Brakes, Suspension · CA

1.) anti lock brake system seems to activate and not allow vehicle to stop nearly as quick as if there was no anti lock system. This has occurred 5 to ten times, but has not resulted in a wreck. 2.) clunking noise in rear end area - sounds line excessive backlash in rear end.