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Automatic Transmission Problems of GMC Sonoma



GMC Sonoma owners have reported 20 problems related to automatic transmission (under the power train category).

car image   Automatic Transmission problem of the 1998 GMC Sonoma 1
Failure Date: 02/10/2007

I am the original owner of a 1998 GMC Sonoma purchased new in February of 1999. Vehicle properly maintained driven as a commuter vehicle approximately 7,400 miles per year. It is equipped with the 4l60e transmission, which is clearly defective. 59,000 miles begins to surge and slip. Acceleration is greatly reduced with harsh shifting. Greatly compromising my safety. Entire transmission needs to be replaced at a cost of $3100. 00 GMC will not reimburse repairs to my vehicle. My claims were "denied" by the district representative.

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car image   Automatic Transmission problem of the 1997 GMC Sonoma 2
Failure Date: 12/05/2003

The automatic transmission on my 1997 GMC Sonoma quit working with only 66,000 miles on the odometer. I'm told this is common.

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car image   Automatic Transmission problem of the 2000 GMC Sonoma 3
Failure Date: 11/08/2002

Lower trans cooler line & trans fitting broke.

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car image   Automatic Transmission problem of the 1998 GMC Sonoma 4
Failure Date: 10/18/2001

The complaint is about my transmission in my 1998 GMC Sonoma. Engine service light came on so I took the truck in for service. I was told that the transmission needed to be rebuilt or replaced as per the service bulletin. A $2,200-dollar fix. The truck is not quite 3 years old though I have 59000 miles on it. I can tell you that Im the only one that has driven this truck and it has hauled no more than groceries I called the customer care center and gm has said they would pay 40 percent of the repair ref case number: c05710638. At first I thought this was better than nothing. But I believe there is a major problem with the transmission and general motors should stand behind the product due to the nature of the failure, warranty or not. This is not right. This is a major part of the vehicle and should not have gone bad this quickly. I will continue to do all the research I can to show that this failure is not normal. If a service bulletin was issued then I think it was a known problem, gm has admitted that they have seen this problem before but because the vehicle is out of warranty this is all will do.

car image   Automatic Transmission problem of the 2000 GMC Sonoma 5
Failure Date: 09/09/2001

Car is unsafe - will pop out of gear or at times will idle and not move forward.

car image   Automatic Transmission problem of the 1998 GMC Sonoma 6
Failure Date: 06/01/2001

Transmission was noisy at any speed, dealer determined a bearing needed to be replaced in transmission. Mileage at repair was 30000. At this time bearing neeed to be replaced again.

car image   Automatic Transmission problem of the 1998 GMC Sonoma 7
Failure Date: 02/19/2001

No summary listed for above vehicle.

car image   Automatic Transmission problem of the 2000 GMC Sonoma 8
Failure Date: 01/22/2001

Transmission sometimes will accelerate without a prior warning, and sometimes will not work while stepping on fuel pedal. The cause for the transmission malfunctioning was found to be the main bolt that holds transmission down which was loose.

car image   Automatic Transmission problem of the 2000 GMC Sonoma 9
Failure Date: 01/22/2001

Consumer had taken vehicle to dealer for check up and found out that transmission bolt had came apart from transmission support, and had to be repaired.

car image   Automatic Transmission problem of the 1996 GMC Sonoma 10
Failure Date: 12/13/1999

We have had numerous problems with this vehicle sine one month after purchase including the idle sticking/interior moulding cracking/transmission rebuilt/computer replaced due to failure engine check light indicator light does not turn off, and right side brake does not seem to wear properly. . My husband is able to recall more.

See all problems of the 1996 GMC Sonoma.


 
car image   Automatic Transmission problem of the 1996 GMC Sonoma 11
Failure Date: 06/09/1999

Due to defective overspeed sensor vehicle stalled unexpectedly while driving which may result in a crash. Please provide further information.

car image   Automatic Transmission problem of the 1996 GMC Sonoma 12
Failure Date: 08/11/1997

Transmission problems still occuring at present time also the interior trim(plastic) is cracking computer was also replaced at the start of the second transmission repair. (under passenger seat).

car image   Automatic Transmission problem of the 1997 GMC Sonoma 13
Failure Date: 05/27/1997

Air conditioning failed as well, after arguing with dealer each time got a rental vehicle and repairs were made. Truck is undependable! want a vehicle buy back!.

car image   Automatic Transmission problem of the 1996 GMC Sonoma 14
Failure Date: 03/14/1997

While exiting from highway consumer was trying to down shift from forth gear to third gear, but it would only go to second gear. Also, windshield wipers stopped working completely.

car image   Automatic Transmission problem of the 1996 GMC Sonoma 15
Failure Date: 11/01/1996

Transmission valve defective.

car image   Automatic Transmission problem of the 1999 GMC Sonoma 16

When in 2 or 4wd on a steep hill in 2nd gear truck does not move. The trans. Will slip and the truck shakes. The owners manual said to use 2nd for.

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car image   Automatic Transmission problem of the 1999 GMC Sonoma 17

When vehicle is in or out of gear engine idles, rpm will flucuate between 1600-3000 intermittently. Dealer ehas replaced idle motor, throttle positioner, new computer , and new software for computer. After several attempts to correct defect, dealer is claiming it is normal.

car image   Automatic Transmission problem of the 1996 GMC Sonoma 18

Transmission locks up between gears.

car image   Automatic Transmission problem of the 1996 GMC Sonoma 19

Consumer notice while shifting vehicle into reverse vehicle was not gaining any power. Vehicle was service technician notice that transmission was over heat. Please provide further information. Ts.

car image   Automatic Transmission problem of the 1996 GMC Sonoma 20

Premature failure of transmission. Vehicle slips and stalls while driving. Vehicle has had 4 transmissions in 18 months.