GMC Sierra checks all the boxes in terms of design and functionality. Its sleek exterior and fully digital interior will excite any mid-sized pickup enthusiast and potential owner. The interior is especially creatively designed to offer state of the art google powered infotainment systems with leather-wrapped interiors that will keep you comfortable among even the rockiest terrains.
In addition, it comes with the option of selecting between four different engines and two transmissions with a rear-drive or an all-drive option at an additional cost.
GMC Sierra 1500 Transmission Problems
The engine and transmission setups should guarantee you a comfortable drive. Still, over the years, especially with later models from 2014 to 2021, most owners, especially those with automatic transmissions, have complained about GMC Sierra’s transmission. They claim that the transmission started misbehaving before the car reached 100000 miles. Across the United States, most owners have had to return their gm vehicles to their dealerships, complaining of the same problems regarding the transmission. Some owners have even taken general motors to court, resulting in several class-action suits against GM motors claiming that GMC knew about these mechanical issues but failed to address them during production.
Clunking Sounds
Most owners complain that they frequently experience this transmission issue when shifting gears. There could be several reasons, including broken transmission components and wrong or low transmission fluid.
When the transmission fluid is low or of poor quality, it heats up much quicker, gets depleted, and leaves the transmission components grinding onto one another. This friction between the parts causes the clanking sounds that most drivers may experience. When you take in your GMC Sierra Truck for repair, the transmission specialist will examine the state of your transmission fluid and advise on whether you need a transmission flush or transmission fluid change. Otherwise, they will continue with the diagnosis to identify other transmission issues.
In the case of broken transmission components, the check engine light will come on, and you may experience some harsh shifts that result in rattling noises from the transmission. A professional transmission rebuilder will have to inspect your truck and recommend the appropriate remedy.
Shifting issues
Many owners, especially those driving Gm trucks with the 6-speed transmission, have complained of hesitation from the transmission when shifting gears. Most claim that it feels like the transmission stuck and didn’t know which gear to change into next. Other drivers complain that the gears don’t down-shift to the first gear; for some, it suddenly shifts gears and stalls the engine. Some drivers experience a shudder in the brake pedal, especially in slow traffic where they have to brake and go.
The shifting problems can arise from different issues, including faulty sensors, a faulty transmission valve body, or a faulty torque converter leading to a complete transmission failure.
The Torque converter converts the engine torque to hydraulic pressure, which helps your car shift into gears. When the torque converter in your automatic transmission GMC sierra 1500 is faulty, your gears will slip out of position, and you will experience some grinding noises or notice that the transmission shifted to neutral while driving. You may also experience changes in your gas mileage performance because the gears don’t change as smoothly or fast as required, leading to a sluggish vehicle and, therefore, more gas consumption than the miles covered. You may experience the same problem if the transmission fluid in the torque converter is contaminated. The remedy for the slipping gears would involve having a transmission service to replace the transmission fluid or a torque converter replacement if found faulty.
A Faulty transmission control module is another problem experienced with most GMC sierras. The transmission control module is responsible for relaying speed information to your engine and transmission to aid in shifting gears. Several shifting issues occur when there is a problem with the sensors, including delayed shifts, harsh shifting, and hard shifts that jolt your truck forward as if someone rear-ended your vehicle. Other drivers have even experienced difficulty stopping because the car didn’t down-shift gears quickly enough and had to come to a complete stop at a red light to check the vehicle and have it towed to their dealer for assessment.
It is important to note that one issue identified for the gm trucks slipping to neutral was a faulty park-lock cable or lock actuator In the steering column and not the transmission.
Cost of GMC Sierra 1500 Transmission Problem Repair
To have your transmission fixed and running may involve a simple transmission fluid change or force you to buy a new transmission. Your options will rely entirely on the extent of damage, and it makes sense to have the work carried out by specialists who can handle any gm product.
A simple transmission fluid change costs between $150 and $ 300. This charge will depend on your location and year of vehicle manufacture. Older vehicles tend to be cheaper to fix. On the other hand, a full service will cost you about $250 and $500 and will involve inspecting the oil pan, changing the filters, and pumping in new transmission fluid.
More complicated repairs and services are bound to cost you more. To rebuild your transmission will cost you between $1500 and $3500, with an additional $500 to $1200 going to labor costs. You should also consider the amounts you will pay for tax and shipment of different components. Other components, like the transmission valve body, may cost you between $300 and $400 to replace.
Looking for a Certified Transmission and Automotive Repair Shop?
Your car’s transmission is one of the essential components in your car or truck. It enhances your driving experience, and you should service it consistently to prevent any inconveniences while on the road.
At Lenfer Auto, we pride ourselves on having a well-trained and professional team of vehicle repair and maintenance experts. Our team also uses modern and state-of-the-art technology to help us correctly diagnose your car’s problem and offer the best service to quickly get you back on the road.
Contact us at 651-478-2144 to schedule an appointment or get a free quote on your future transmission-related service and maintenance.