2011 GMC SIERRA 1500

Vehicle experienced a catastrophic mechanical failure characterized by a percussive "shotgun blast" noise from the rear chassis, followed by an immediate, total loss of braking power (pedal to the floor) and a violent loss of directional stability. This incident represents an aggravated safety failure of known GMT900 platform defects. The technical chain of causality began with the factory exhaust manifold fasteners suffering a metallurgical shear, a universal defect documented under GM Bulletins 19-NA-218, PIP5075, and PIP4701. This shear created a high-velocity, high-heat exhaust leak directed at the brake master cylinder and vacuum assembly. This "heat soak" event compromised the engine-mounted mechanical Brake Vacuum Pump (Recall N192268490 / NHTSA 19V645) and destroyed the internal seals of the Master Cylinder (Special Coverage 15143 / NHTSA 11V599), resulting in total depletion of vacuum assist and hydraulic pressure. Simultaneously, the "shotgun blast" and violent swerve were caused by structural failure consistent with Rear Brake Caliper Bolt Fracture (GM 13247 / NHTSA 13V342) and Rear Axle Shaft/Pin Fracture (GM 14892 / NHTSA 14V819). This mechanical collapse caused the caliper to strike the wheel, resulting in a catastrophic rim blowout and immediate loss of tire pressure. Despite the vehicle having aftermarket long-tube headers installed, the root cause of the heat-related brake failure was the failure of the OEM GM manifold fasteners which snapped off in the cylinder head, as documented in the aforementioned bulletins. Under the Magnuson-Moss Warranty Act, the manufacturer remains liable for these pre-existing safety-critical defects. The vehicle is at Glenn Polk Chevrolet for a 901-series Product Allegation Investigation (Case #90199492). This report is filed to demand federal oversight into these life-threatening defects. The combo of failed fasteners, rim blowout, and compromised braking created a vehicle that was both unable to be steered or stopped

Vehicle experienced a catastrophic mechanical failure characterized by a percussive "shotgun blast" noise from the rear chassis, followed by an immediate, total loss of braking power (pedal to the floor) and a violent loss of directional stability. This incident represents an aggravated safety failure of known GMT900 platform defects. The technical chain of causality began with the factory exhaust manifold fasteners suffering a metallurgical shear, a universal defect documented under GM Bulletins 19-NA-218, PIP5075, and PIP4701. This shear created a high-velocity, high-heat exhaust leak directed at the brake master cylinder and vacuum assembly. This "heat soak" event compromised the engine-mounted mechanical Brake Vacuum Pump (Recall N192268490 / NHTSA 19V645) and destroyed the internal seals of the Master Cylinder (Special Coverage 15143 / NHTSA 11V599), resulting in total depletion of vacuum assist and hydraulic pressure. Simultaneously, the "shotgun blast" and violent swerve were caused by structural failure consistent with Rear Brake Caliper Bolt Fracture (GM 13247 / NHTSA 13V342) and Rear Axle Shaft/Pin Fracture (GM 14892 / NHTSA 14V819). This mechanical collapse caused the caliper to strike the wheel, resulting in a catastrophic rim blowout and immediate loss of tire pressure. Despite the vehicle having aftermarket long-tube headers installed, the root cause of the heat-related brake failure was the failure of the OEM GM manifold fasteners which snapped off in the cylinder head, as documented in the aforementioned bulletins. Under the Magnuson-Moss Warranty Act, the manufacturer remains liable for these pre-existing safety-critical defects. The vehicle is at Glenn Polk Chevrolet for a 901-series Product Allegation Investigation (Case #90199492). This report is filed to demand federal oversight into these life-threatening defects. The combo of failed fasteners, rim blowout, and compromised braking created a vehicle that was both unable to be steered or stopped

Vehicle experienced a catastrophic mechanical failure characterized by a percussive "shotgun blast" noise from the rear chassis, followed by an immediate, total loss of braking power (pedal to the floor) and a violent loss of directional stability. This incident represents an aggravated safety failure of known GMT900 platform defects. The technical chain of causality began with the factory exhaust manifold fasteners suffering a metallurgical shear, a universal defect documented under GM Bulletins 19-NA-218, PIP5075, and PIP4701. This shear created a high-velocity, high-heat exhaust leak directed at the brake master cylinder and vacuum assembly. This "heat soak" event compromised the engine-mounted mechanical Brake Vacuum Pump (Recall N192268490 / NHTSA 19V645) and destroyed the internal seals of the Master Cylinder (Special Coverage 15143 / NHTSA 11V599), resulting in total depletion of vacuum assist and hydraulic pressure. Simultaneously, the "shotgun blast" and violent swerve were caused by structural failure consistent with Rear Brake Caliper Bolt Fracture (GM 13247 / NHTSA 13V342) and Rear Axle Shaft/Pin Fracture (GM 14892 / NHTSA 14V819). This mechanical collapse caused the caliper to strike the wheel, resulting in a catastrophic rim blowout and immediate loss of tire pressure. Despite the vehicle having aftermarket long-tube headers installed, the root cause of the heat-related brake failure was the failure of the OEM GM manifold fasteners which snapped off in the cylinder head, as documented in the aforementioned bulletins. Under the Magnuson-Moss Warranty Act, the manufacturer remains liable for these pre-existing safety-critical defects. The vehicle is at Glenn Polk Chevrolet for a 901-series Product Allegation Investigation (Case #90199492). This report is filed to demand federal oversight into these life-threatening defects. The combo of failed fasteners, rim blowout, and compromised braking created a vehicle that was both unable to be steered or stopped

The door handle broke off on the driver side the passenger side door handle will not open the door the outside handles are loose and the rear back driver and passenger side will not open their doors.

Frame falling apart the coating peeled off was going to clean it to recoat it but the metal is so far gone took it to a frame shop only to find out it's not drivable anymore GM have to do better with the coating for this trucks

2011 GMC Sierra Frame Failed Pennsylvania State Inspection due to Driver Side Frame Rust/hole. The section of the frame must be replaced due to rust(Improper coating... The truck has only 69700 miles on the odometer.

2011 GMC Sierra Frame Failed Pennsylvania State Inspection due to Driver Side Frame Rust/hole. The section of the frame must be replaced due to rust(Improper coating... The truck has only 69700 miles on the odometer.

Odometer Fraud. The contact purchased a 2011 GMC Sierra 1500. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the mileage was 119,000, and at the time of registration, it was discovered that the mileage was 128,000.

Vehicle is up for inspection in February of 2025 and due to the frame rust it will not pass.

When I put the truck in 4wd the dash says service stabilitrak and the traction control light and abs light come on

When I put the truck in 4wd the dash says service stabilitrak and the traction control light and abs light come on

My GMC which is well cared for and only has 121,000 miles has a rusted through frame (mid-vehicle, left side) which has made the truck unsafe to drive. The steel used is inferior, my neighbor across the street also has this truck, 2 years newer, and is doing the same thing. As I have researched this issue I have found out that this is a critical failure of the GMC Sierra for several model years due to a failure to protect the steel used in northern states which compromises structural integrity. When Toyota had this issue, they stepped up and replaced the frames. General Motors, please tell me what you intend to do with this. It is a 5.3 Litre with 121,000 miles on it, in other words, still a baby for such a fine engine. This is not right. I am seriously discouraged. For my family, this is devastating. I still owe $2000 on this vehicle. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

See attached document for complaint

Transmission won’t shift

Over the past few years squirrels have eaten through the fuel line of the truck just above the fuel tank multiple times. As soon as the ignition switch is turned on fuel gets pumped out very near the exhaust system. The driver may not notice anything wrong immediately causing a very real fire risk. Today is the fourth time I have experienced this issue with this truck.

This is not a safety item, but one that causes undue financial hardship for the owner. It is widely know that the dash on certain 2007-2014 GM vehicles (generally trucks and SUV's) is susceptible to cracking. This causes devaluation of the vehicle if not fixed and is reported to cost between $2,000-2,500 to repair. It is my opinion that the cause of this is the use of substandard parts by GM and they should issue a recall for the repair of the dash.

My truck keeps getting code p2138, when it happens I get reduce engine power alerts, check engine light and it stalls. It's been doing it for years now. It's very unsafe, last time it it did it I was on the freeway and had to pull to the side, but the car has no acceleration so vehicles are passing me by at 75- 80mph and I almost had a very bad accident.

Frame is rusted through

Rear shock holder rusted through cross member on frame making top of shock stay forced against bottom of the bed of the truck.

Rear shock holder rusted through cross member on frame making top of shock stay forced against bottom of the bed of the truck.

Rear shock holder rusted through cross member on frame making top of shock stay forced against bottom of the bed of the truck.

The contact owns a 2011 GMC Sierra 1500. The contact stated that while the vehicle was parked, the contact noticed a separation of the rear sub frame of the vehicle. The vehicle was taken to be diagnosed by an independent mechanic. The contact was informed that the rear sub frame was extremely rusted. The vehicle had not been repaired. The manufacturer was made aware of the failure and referred the contact to a dealer for assistance. The failure mileage was approximately 112,000.

I own a 2011 GMC Sierra 1/2 ton pickup truck. It currently has 98 k miles. The crossmember for the frame rusted out and fell off last month. Yesterday the frame broke in two. I see from looking online that GMC failed to add rust inhibitor to the steel for the frame. This is a safety issue and could have been catastrophic. Is anything being done about this failure? Online forums show this happening throughout the US.

Body damage when I bought the truck

Hit a pot hole in a parking lot and the gas tank fell onto the ground. Upon further inspection, it was discovered that the frame cross members and fuel tank straps are rusted/rotted and cannot support the tank.

Body damage when I bought the truck

Vehicle is 12 years old with 105,000 miles and frame has multiple cracks/ holes. I was told by the dealer that the truck is basically junk.

Vehicle is 12 years old with 105,000 miles and frame has multiple cracks/ holes. I was told by the dealer that the truck is basically junk.

The fuel pump rusted out from the gas tank causing fuel to leak onto the hot exhaust system. There was a stong gasoline odor which kead to the discovery. The repair bill was $911.00.

The brake light switch located on the brake pedal failed. This disabled the cruise control, and the brake lights .

- The traction control/stabilitrac malfunctioned causing my truck brake automatically while in motion. - Its causing my truck to brake unexpectedly - My mechanic said its an electrical issue and its becoming common in these trucks - My dashboard messages alternate from "traction control off" and "service stabiltrak"

The main body frame is completely rusting through from under the drivers side door back past the fuel tank. It is rusting through on the passenger side as well. The large amounts of rust have caused other issues throughout the entire body of the truck as well as rusting of other components. The frame of this truck will need to be replaced as there is no way to repair it or the vehicle becomes scrap. This vehicle is available for inspection. These issues were not visible when purchased from the dealer. This issue gradually became visible after the rust and undercoating wore away that had been applied previous to our purchase from a known dealership.

The main body frame is completely rusting through from under the drivers side door back past the fuel tank. It is rusting through on the passenger side as well. The large amounts of rust have caused other issues throughout the entire body of the truck as well as rusting of other components. The frame of this truck will need to be replaced as there is no way to repair it or the vehicle becomes scrap. This vehicle is available for inspection. These issues were not visible when purchased from the dealer. This issue gradually became visible after the rust and undercoating wore away that had been applied previous to our purchase from a known dealership.

The main body frame is completely rusting through from under the drivers side door back past the fuel tank. It is rusting through on the passenger side as well. The large amounts of rust have caused other issues throughout the entire body of the truck as well as rusting of other components. The frame of this truck will need to be replaced as there is no way to repair it or the vehicle becomes scrap. This vehicle is available for inspection. These issues were not visible when purchased from the dealer. This issue gradually became visible after the rust and undercoating wore away that had been applied previous to our purchase from a known dealership.

Just noticed that the Frame is rusting badly. It is available for inspection upon request. I see that the Chevy Silverado has the same problem and that a recall exists for it, but not for the GMC Sierra, which is virtually the same truck. My safety or the safety of others can be put at risk if the frame were to fail. The problem has not been reproduced or confirmed by a dealer or independent service center. The vehicle or component has not been inspected by the manufacturer, police, insurance representatives or others. Unknown about any warning lamps, messages or other symptoms of the problem. No failure yet.

I have a 2011 GMC Sierra Standard Cab pickup truck. I’m a disabled veteran and have this as my primary vehicle. The frame has a huge hole that developed and will need repair. The frame is rotted and soon will not pass inspection. The truck looks brand new but Engin compartment, frame and tow parts have rotted. I had the leaf spring separated from rotted frame on the highway. I swerved and almost died. GMC must replace the frame to make this right. Soon I will have no truck after giving GMC so much money. It’s criminal what they have done.

11/2022 shift cable separated from shift lever; preventing ability to put vehicle Into park. Retaining clip deteriorated allowing separation. Fortunately it happened when leaving parking garage and not moving fast. Was able to refasten using zip-tie until new retaining clip arrived at auto parts store.

Dashboard has completely cracked and fallen apart. I fear safety if airbag were to deploy, that there would be plastic pieces that could directly damage passengers in the car. I am also very disappointed at the cost to repair the dash and the value that is lost from the truck because of the cracked dash issue.

Takata recall. The contact owns a 2011 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 21V054000 (Air Bags) however, the part to do the repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

I towed a U-Haul trailer for four hours from Winter Springs, FL to Tallahassee, FL 08/18/2022. On the way back to Winter Springs, FL on 08/21/2022, I began to hear the dings and a message to service the trailer brake system. I had the vehicle looked at to determine the problem. The fuse was determined to be good, the ground wire was secure and not damaged, and the relay was functioning. I have been told that it may be a defective wire harness which could lead to other safety issues while operating the vehicle. The constant dinging and the blocking of vital messaging by the warning is a distraction and safety issue. A recall should be issued to correct this safety defect.

I towed a U-Haul trailer for four hours from Winter Springs, FL to Tallahassee, FL 08/18/2022. On the way back to Winter Springs, FL on 08/21/2022, I began to hear the dings and a message to service the trailer brake system. I had the vehicle looked at to determine the problem. The fuse was determined to be good, the ground wire was secure and not damaged, and the relay was functioning. I have been told that it may be a defective wire harness which could lead to other safety issues while operating the vehicle. The constant dinging and the blocking of vital messaging by the warning is a distraction and safety issue. A recall should be issued to correct this safety defect.

Frame rusting away and cracking. On left side in front of EVAP canister. Noticed it on 8/14/22.

No Airbags

The entire frame of truck has rusted through.

The contact owns a 2011 GMC Sierra 1500. The contact stated that the air bag warning light was illuminated. The contact later received notification of NHTSA Campaign Number: 21V054000 (Air Bags). The vehicle was taken to the dealer where the front passenger's side air bag was replaced; however, the air bag warning light remained illuminated. The dealer informed the contact that the failure could be associated with the front driver's side air bag; however, there was no recall for the front driver's side air bag. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 72,000.

The contact owns a 2011 GMC Sierra 1500 equipped with Goodyear Tires, Tire Line: Wrangler 12th Grade Pro, Tire Size: 265/70/R17, DOT Number: PJAH35HV3518. The contact stated while her friend was driving approximately 40-45 MPH with her seated in the passenger’s side seat, the passenger's side front tire experienced tread separation. The passenger's side curtain airbags, the driver's side curtain airbags, and the airbag located at the edge of the driver's seat deployed. The emergency fuel shut-off valve failed to engage. There were no warning lights illuminated. The contact sustained injuries on her right arm, and her friend sustained injuries to the face. Medical assistance was not needed. The driver veered to the side of the roadway. The driver was able to drive the vehicle to the nearby hotel as the tire was not totally deflated. The contact stated that only the outer layer of the tire had separated. Upon attempting to use both the front driver's seat belt and the front passenger's seat belt the next morning, the contact noticed that they had seized and would not retract nor extend. The vehicle was not diagnosed or repaired. The dealer and manufacturer were not notified of the failure. The tire dealer and manufacturer were not notified of the failure. The tire was replaced with a spare tire. The tire was a replacement tire. The vehicle failure mileage was approximately 302,984. The tire failure mileage was approximately 15,000.

The contact owned a 2011 GMC Sierra 1500. The contact stated that while the vehicle was parked at the residence overnight, the vehicle caught on fire. The fire spread to his other vehicle, a 2000 Chevrolet Blazer, and that vehicle was also destroyed. The fire department was able to extinguish the fire. A fire department report was filed. The contact was informed that the cause of the fire ignition was unintentional. Both vehicles remained at the contact's residence and were deemed totaled by the insurance company. The dealer was made aware of the failure and informed the contact that the vehicle was included in NHTSA Campaign Number: 21V054000 (Air Bags) however, the cause of the fire was not related to the failure. The manufacturer was not made aware of the failure. The failure mileage was approximately 201,000.

The power steering failed while operating the vehicle. Unsafe. Local GMC dealership Haggerty in Oak Lawn, IL not able to diagnose problem after fact. My safety and others were at risk. Not confirmed, as techs are not familiar with system. No warnings prior to power steering failure. Be advised, this is a hybrid pickup, and as such, does not have a traditional power steering pump system. Other GM models from the same era have had recalls, but the Silverados and Sierras were somehow omitted. The power steering assist motor has failed. Not the "brains", module.

Takata Recall. The contact owns a 2011 GMC Sierra 1500. The contact received a recall notification for NHTSA Campaign Number: 21V054000 (Air Bags) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer and the manufacturer were not notified of the issue. The contact had not experienced a failure. VIN tool confirms parts are not available.

The contact owns a 2011 GMC Sierra 1500. The contact stated while starting the vehicle, the air bag warning light was illuminated. The contact took the vehicle to a local dealer to be diagnosed. The contact was informed that the driver’s side air bag needed to be replaced. The vehicle was not replaced. The manufacturer was not made aware of the failure. The failure mileage was approximately 112,000.