general problems of the 2009 GMC Sierra 1500

Tl the contact owns a 2009 GMC Sierra 1500. While driving 65 mph, the speedometer and the tachometer gauges fluctuated up and down, the air bag and transmission indicators illuminated, and the engine seized. The vehicle was not taken to a dealer to be diagnosed or repaired. The manufacturer was notified and informed the contact to call a dealer. The failure mileage was approximately 47,540.

Stability control. The stabilitrack warning appears. All of the gauges go to zero, the power locks engage and disengage, the engine revs and the driver loses control of the truck. This is an extremely dangerous problem. The dealership can't find anything wrong because no codes are showing. This needs to be a major recall. It's a common problem, google it and see how many people have the same issue with no resolution. Force gm to address and resolve this known issue.

At 80000 my truck is going through 4 to 6 qts of oil between oil changes. As a master technician this has got to be the poorest excuse for engineering I have ever come across with this afm system they have. I know several people that have lost an engine by 100000 miles. With todays technology that's a bad joke on the consumer. With shorter intervals and some additive's I have managed to get to 1 qt every 1900 miles and that's as good as it gets.

To whom it may concern, I am submitting this report regarding repeated engine and valve lifter failures in my 2009 GMC Sierra 1500 with a 5. 3l v8 engine, VIN: [xxx] . 1. Component/system malfunctioned: both the original engine and a replacement engine—professionally installed by a Chevrolet dealership—experienced valve lifter failure related to the active fuel management (afm) system. The most recent failure was sudden and unexpected. The engine may be available for inspection upon request. 2. Safety risk: engine failure puts driver and passenger safety at serious risk, particularly if the vehicle loses power unexpectedly while in motion. In both instances, the failure created unsafe driving conditions. 3. Reproduction/confirmation: the issue was confirmed by a Chevrolet dealership during the initial engine failure and again more recently on the current engine, which is now exhibiting the same failure. 4. Inspection status: the vehicle has been inspected by the same dealership that performed the original engine replacement. To my knowledge, it has not been inspected by gm corporate, police, or insurance representatives. 5. Warning signs: there were no warning lamps, messages, or clear symptoms prior to the failure. The problem occurred without advance notice and did not provide an opportunity to address it before damage occurred. This is the second engine failure my truck has suffered from the same issue, even after dealership installation of a new motor. I urge the NHTSA to investigate whether this represents a broader defect in gm 5. 3l afm-equipped engines. It is unacceptable that repeated critical failures can occur in these engines with no warning and no resolution, even after following proper replacement procedures. Thank you for your attention. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I have regular maintenance done on vehicle from certified GMC dealership. However, a few days ago while driving the vehicle both the engine light and traction control lights came on, causing the vehicle to display low engine warning and losing almost all acceleration. Took it in to dealership, and was charged nearly $800 for repair.

Lifter failure! expensive repair! common issue on afm 5. 3 v8 engines. Driving down hwy. Just had had low oil pressure issues and made necessary repairs the very day before (cleaned small screen that picks up oil to send pressure to dash guage) changed oil at dealership, only to drive truck less than 75 miles and loud knocking in engine occured, truck went into "limp mode" had to be towed to dealership for a full lifter replacement. Again, common problem that should of been recalled/repaired before drivers are left stranded facing huge expensive repair bills.

The contact owns a 2009 GMC Sierra 1500. While driving approximately 50 mph, the low oil pressure stop engine warning indicator illuminated. The vehicle was taken to dealer, where it was diagnosed that the oil pressure release valve needed to be replaced. The vehicle was repaired but the failure recurred. The manufacturer was made aware of the failure. The failure mileage was 99,908.

Excessive oil usage, have had it monitored 3 times per gm. Uses oil every 2 thousand miles ,they are aware that these 5. 3 v8 are doing so. There is a service bulletin out on this problem, this problem needs to be investigated by our government.

The contact owns a 2009 GMC Sierra 1500. The contact stated that while driving at highway speeds, the vehicle hesitated while depressing the accelerator pedal. The traction control and check engine warning lights were illuminated. The contact used a code reader and discovered a misfire in cylinder #4, and performed a compression test, which verified that cylinder #4 was failing to maintain compression. The vehicle was taken to a dealer where it was discovered that there was a failure with the lifter in cylinder #4. The vehicle was not repaired and remained with the dealer for additional diagnostic tests. The manufacturer was notified of the failure but offered no assistance. The contact was referred to the NHTSA hotline to report the failure. The failure mileage was approximately 56,000.