Automatic Transmission Problems of GMC Sierra - part 1

The contact owns a 2017 GMC Sierra. The contact stated that on several occasions while accelerated at various speeds, the gears inadvertently shifted from high to low and the rpms increased. No warning lights was illuminated. The vehicle was taken to the dealer where the failure could not be determined however, the failure recurred. The vehicle was then taken back to the dealer where it was diagnosed that the valve body, the clutch, the piston, and transmission plates needed to be replaced. The vehicle was repaired however, the failure recurred. The contact stated that while driving, he felt a hard shift into lower gear and felt the gears had shifted and jumped into third gear without warning. The vehicle was taken back to the dealer, but the failure recurred. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 60,000.

See all problems of the 2017 GMC Sierra 🔎.

: the contact stated while towing the vehicle, the transmission downshifted to a lower gear which caused the tires to skid. The vehicle was driven to the dealer who determined the vehicle was designed that way.

See all problems of the 2006 GMC Sierra 🔎.

While driving on the hwy. Towing my 28 ft 5th wheel trailer on level ground we experienced a loud bang and the feeling like something in the driveline had broken. No engine malfunction indicators were displayed on the console. No further incidents have happened yet, but it is constantly on my mind.

See all problems of the 2001 GMC Sierra 🔎.

: the contact stated while driving in normal conditions, the transmission locked up. The vehicle was taken to the dealer several times for inspection. The dealer replaced the transmission; however, the new transmission has the same problem.

See all problems of the 2004 GMC Sierra 🔎.

: the contact stated while driving at various speeds the vehicle intermittently fails to shift into third and fourth gears. When the shifter fails the digital gauges fail to illuminate. The vehicle shifts normally after a short period of time. Upon inspection the independent repair shop was unable to determine the cause of the failure.

See all problems of the 2000 GMC Sierra 🔎.

The transmission clunks when shifting from 2nd - 3 rd and at times the engine will rev and finally it will take off, this has caused an issue when going through an intersection. The dealership attempted four repairs and it is not fixed. The issue started when the vehicle had 6k miles on it and it is getting worse. The speedometer is sporadic in that it will show speed reduction/increase in segments - as if it were sticking. The erroneous speed indication causes an issue when going too slow or too fast in traffic.

See all problems of the 2003 GMC Sierra 🔎.

Transmission: been fixed 3 times and finally replaced a/c: repaired once front end-steering: repaired 3 times and still not fixed.

GMC 2002 1/2 ton pickup,transmission reverse went out at 44,000 miles (first time it went out at 28,000 miles). Repaired for second time parts. Reaction shell gear stripped. Parts shell, gear, fltr kit, seal, seal oil, gasket. R&r trans replace reaction shell and gear.

See all problems of the 2002 GMC Sierra 🔎.

The contact received NHTSA recall 05v379000 concerning the anti -lock brake system. He took the vehicle to the dealership, and they performed the recall repairs. The abs light was still on, and the abs did not work. While driving for short periods of time the consumer experienced brake failure. This resulted in extended stopping distance. He contacted the dealership and manufacturer, but the problem was not covered by the recall. The consumer had difficulty shifting into 3rd gear. Updated 12/07/05.

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.

See all problems of the 1999 GMC Sierra 🔎.

Dt: the engine has died, once while driving and once at a stop sign. The transmission was jumping and was put in neutral to steer to another lane. The other time there was no sign of a problem before engine stalled out. There has been many times this has been in the shop due to transmission problems. Have been with gm a few times and they came to the conclusion that they would send a representative to check out the truck. They never sent one, as of today, gm said that they didn't do that. Consumer wanted a buy back. Consumer talked to bbb today, they said that the consumer might be getting a call from gm. Consumer had the vehicle in the shop 3 times, all due to transmission and engine related problems. Dealer has tried to fix problem 3 different times, but that is not working and has made condition worse than before.

See all problems of the 2005 GMC Sierra 🔎.

The contact owns a 2005 GMC Sierra 1500. The truck had a transmission leak. After five times trying to correct the problem he let the vehicle go back, and lost money on the truck when he traded it in. He had the receipts available. They replaced seals on the rear shaft and the rear shaft housing. He called GMC customer service they had a kit so they had to replace a bunch of seals in it. Three weeks later the vehicle was leaking again. The vehicle has been in the shop 4 times for the same problem since the date of purchase which was November 15, 2004. Also, had problems with the cd player. They corrected the problem by replacing the entire cd player.

Automatic transmission would intermittently hesitate before catching in gear while driving. Vehicle has been to the dealer on two separated occasions and they were unable to duplicate the problem. Consumer was concerned that this vehicle maybe rear ended. The truck was on an incline in overdrive with my foot on the brake, let off the brake and gave it gas to merge into traffics and the truck wouldn't accelerate. It hesitated until felt like a gear caught and then into traffic instead of going when it needed to go. The second time was almost the same way.

Consumer and his wife were cleaning the vehicle. Husband was outside washing the vehicle, while the wife was inside the vehicle, cleaning. The wife had the key in the ignition, turned to accessories while listening to the radio, and accidentally pushing the shifter down with car being off and vehicle moved backward, hitting the husband and injuring his knees. The consumer entered a file # of 1-281746845.

I drive a 2003 GMC Sierra and there is a transmission problem it makes the driving very dangerous especially at highway. Speed. The vehicle cannot stay strait it either pulls to the left or to the right. The feel of the vehicle isn't right like if its dog tracking. There are clonking and ticking sounds coming from the transmission just from shifting from drive to reverse,reverse to drive. . . Park. While driving when engaging the passing gear sometimes you hear that clonking sound like if there was a slack in the transmission. I had this vehicle since July 2004 and since then I've been to the dealership a number of times everytime they said that everything was ok and showed me paperwork stating from gm canada that clonking, ticking etc. Etc. Were normal operation of the transmission. It cant be cause I had a 2001 GMC truck which I traded for, that drove like a truck this one I have now drives like a tank. Every hole or crack in the road I can feel when I hit a small hole or a dip in the pave the vehicle wants to dog track most of the time the truck pulls to the left, when it does there is a slight vibration you can feel from the accelerator or the brake. This vehicle I find is a accident waiting to happen. Its a big vehicle and to swerve side to side scares other vehicles on the highway, which puts everybody at risk everytime I'm on the road. From all these complaints I did to gm still today they tell me and show me paperwork from gm tech line. Stating that everything is normal and no work from there part should be done on this truck. It's like if gm has people working on these statements just to cover themselves from having to repair or change parts in order to save money in which I wouldn't dought. If you can help me please. Let me know cause this is a very serious matter which I would like to fix before I get into an accident. I believe there is a controversy into all of this.

Our son-in-law owns a 2004 GMC 4-door pickup. It has automatic transmission. Our two-year old grandson was in the truck while his father was cleaning it. The key was in the accessory position so they could listen to the radio. The child pulled the shift lever out of park and the truck ran away down an incline. Both driver's side doors were separated from the vehicle by a tree and the truck continued until rear-ending another tree. The child stayed in the vehicle and was unhurt. In checking this truck, our 2003 tahoe, and our 2003 Chevrolet pickup we find that all of them: 1. The shift lever is locked when the key is in the locked position 2. The shift lever is locked when in the "run" or ignition position and requires the brake to be depressed prior to shifting. 3. But in the "accessory" position the shift is completely unlocked and requires only a very slight pressure to move it out of park and result in a runaway. I feel there is no reason for the shift lever not to be locked in all positions and, in fact, the fact it is locked in two positions but not the accessory position results in confusion and a false sense of security. This was not a component failure, but is a design failure that apparently involves all gm trucks and suvs of this model.

I purchased my 2003 GMC Sierra z71 in Aug. 2003. In December 2003, while pulling a travel trailor, the service 4-wd light came on and the truck felt as if it had been shifted into neutral. I managed to get the truck to the side of the road and read the owners manual concerning the light. I turned the truck off as the book said and then restarted. The light stayed on, but the truck did go in gear. Since this time, when I pull the trailor for a long period of time, the truck will again feel as if it is in neutral. I have to put the truck into 2nd or 1st gear to get the transmission to engage. The 4wd light comes on with or without the trailor hooked up and has been checked several times by the dealer. They have replaced the switch but this has not corrected the problem. The transmission shifts so hard it feels as if the back end of the truck will fall out. I was told this is normal operation. Something needs to be done to correct this problem as this is a huge safety issue. No one can feel comfortable driving down a road and never knowing if you will be hit from behind due to this truck stalling for no reason.

We have a 2001 GMC crew cab that we have had for 26 months. Be bought it brand new so we would be less likely to have problems. We have had 3 new transmissions (not including the factory one). It is in the repair shop again because when you put the truck in reverse it dies. Not every time but it happens quite often. It was in the shop before for the same exact problem which resulted in 1 of the 3 new transmissions. Lets hope it doesn't need another one. This is getting old!!!!!!!!!!!.

Transmission makes a clunking sound when shifting from 2nd to 3rd gear. Also, intermittnet slipping of transmission when starting to move from a full stop. Vehicle hesitates before it begins to move. This occured within the 1st 500 miles and contines to occur today.

2003 GMC Sierra slt z71 extended cab, 13000 miles. Transmission shifts slowly and slips between 1st and 2nd. Drivetrain very very noisy between up and down shifts. Knocking in steering wheel.

2003 GMC Sierra, 7000 miles automatic transmission is jerky. Very poor performance. Service department refuses to acknowledge the problem. I know for a fact this is fairly widespread. What can the dealer do about it?.

While driving at any speed vehicle has a problem shifting into a gear. When the gear is changing there is a hard thump/a brief hesitation before the gear actually goes in to the proper position. Vehicle had been to the repair shop five times for this same problem, but problem still persists. Dealer and manufacturer have been notified of the problem.

Problems with transmission shifting incorrectly. While driving, the transmission became hot, and disengaged from overdrive to lock up mode, and blew 2 quarts of automatic transmission fluid out the vents.

See all problems of the 1998 GMC Sierra 🔎.

While driving the fourth gear of the automatic transmission jumped. The dealer inspected the vehicle but could not duplicate or correct the problem.

Transmission hesitates badly to shift 2-3, when cold out.

After driving for about 1 hour on the highway, we exited and came to a stoplight that is when the transmission started shifting hard from first to second gear. When I got home I went on-line and that is when I realized that I am not the only 1997 GMC Sierra owner that has this very same problem, there are literally hundreds if not thousands of us out there with the exact problems with this vehicle. I would like to know if there is a recall being considered at this time?.

See all problems of the 1997 GMC Sierra 🔎.

Transmission shifts with a strong jerk from 1st to 2nd gear, problem began 7/30/02, dealer replaced valve body, return again 8/8/02 with same problem, replaced same part, occurred again leaving dealer same day as pickup returned back to dealer again on 8/13/02 I was told it was the channel plate at that time by service and called by gm mfg and was told it was valve body again.

While driving vehicle will not go into overdrive or go into reverse. Dealer notified.

There are problems with the shifting mechanism on the transmission. Dealer was contacted. Ph.

Hard shift between gears, lost overdrive & reverse -- seems to be common problem!.

See all problems of the 1996 GMC Sierra 🔎.

There is a hard shift between 1 and 2 gears after driving several miles.

Consumer states when applying brakes, the vehicle downshifted to a low gear and would not shift out, the back tires locked up and caused the vehicle to lock up and fishtail.

No summary listed for above vehicle.

GMC Sierra has been in shop to many times to keep track of. Truck also has a problem with sticky throttle body which has been dangerous. GMC gave extended warranty in 2000 bacause of problems also issued customer appreciation certificate if I wanted to buy new gm product. Service manager told me to cut my losses and but a new one. GMC will not do a thing for me. Contacted nys attn. General about problems. GMC now has their legal core calling me at home . I have asked them to buy vehicle back research the parts and assembly to protect other owners. GMC says sorry . I asked them how they could warranty rust thru for 100,000 but could not protect abs from corrosion, GMC response was hey you live in new york state. And they are under no financial obligation what so ever.

I have a 1998 GMC z71 with 61,000 miles that I bough new and just had to have a new transmission put in at a cost of $2000. 00. When I told the serviceman what the transmission was doing he automatically new what the problem was. He said that it was the shaft housing that had busted and it messed up the whole transmission. It sounded like it was a problem that happens quite often by the way he responded. He said that the shaft housing was not as heavily built as the new one they installed. Does this mean that other owners will have the same problem with there truck around 60,000 miles? it sounds like a deffect to me if the shaft housing was not built strong enough to take the use that a truck is put through. I tow a small 5x10 utility trailer and have hauled a 27 travel trailer one time with this truck so it does not haul a lot of weight. I just hope that I do not have to have another one in about 60,000 miles. I like my truck and have payed a lot of money for it and plan to keep it.