Which parts fail
Components named in complaints (automatic and manual transmissions, CVT, axles, driveshaft, 4WD/AWD).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2007 Chevrolet Silverado 2500 owners, lightly cleaned up (personal details are redacted by NHTSA).
Tl* the contact owns a 2007 Chevrolet Silverado 2500. The contact stated that the vehicle shifted hard into gear and the check engine warning light illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the solenoid cylinder needed to be replaced. The vehicle was taken to another mechanic where it was diagnosed that the transmission drum was cracked and the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 80,000.
Tl* the contact owns a 2007 Chevrolet Silverado 2500. After parking the vehicle, there was fluid leaking from the front of the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 67,200. Updated 7/9/15 the consumer stated the transmission cooking line to the radiator was seeping oil. The dealer stated the cooling lines between the radiator and transmission were leaking oil were the metal lines connected to the rubber. Updated 08/13/15
Tl* the contact owns a 2007 Chevrolet Silverado 2500. While driving in second and third gears, the transmission suddenly malfunctioned and the vehicle decelerated significantly. The vehicle was taken to bromin Chevrolet in bromin, florida where it was diagnosed that the transmission was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The VIN was not available. The failure mileage was 80,000.
Tl* the contact owns a 2007 Chevrolet Silverado 2500. While driving 55 MPH, the engine warning indicator illuminated intermittently. In addition, the gear shifter made a clicking noise when shifting into gear. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 10,000. Updated 01/11/2017 updated 01/26/17.
A year ago, I had to replace all of the major undercarriage lines after the transmission lines blew out. While having the transmission lines and brake lines replaced, I was told the fuel lines were split at the fire wall over the transmission and had to be replaced as well. It was @2K of an unexpected expense/upgrade.
Automatic transmission lines 2007 Chevy Silverado with allison transmission. Factory transmission lines leak and must be replaced. When the weather turns cold, the lines/crimps holding the rubber hose to the pipes fail and automatic transmission fluid is lost, sometimes in catastrophic manner, causing the vehicle to loose propulsion. Reports of failure are extremely common, and it is not unusual, that the lines May have been replaced 3 times within the 1st 50,000 miles. GM has issued 'new, updated' parts, but they are no better than the original parts. The new part numbers are 20759971, 20759972, 20759973. While repair is covered on the 36K bumper to bumper warranty, there is no coverage on the 100K warranty. GM should replace the lines free of charge for the 1st 100K miles with a hose that will not fail. …
Transmission cooler line is leaking and needs to be replaced, when the weather turns cold the crimps fail and automatic trans fluid is lost causing the engine compartment to become a fire hazard when driving on the road. This is a very common problem due to the fact that the 4 other people I work with who have the same yr diesel truck or prior have had the exact same problem, not to mention countless other people online that I have talked to stating the same thing. Part number GM 20759971, GM 20759973, gm20759972. This is ridiculous that I as a consumer and everyone else have to pay for a defect that could possibly endanger my life or others in daily commuting. This is way to common to have us pay for the fact that they sent us out on the road with defective parts and are not willing to pay for there mistakes.
Tl contact owns a 2007 Chevrolet Silverado 2500hd. The vehicle was taken to an authorized dealer for routine maintenance service. The technician detected defective transmission cooling lines. The vehicle was repaired under the service warranty. There was concern of the potential safety hazard. The failure mileage was 28,000. Updated 02/13/10 the consumer stated the transmission cooling lines that were replaced began to leak as well on or around January 2, 2010. The leaking transmission fluid enters the entire compartment of the vehicle creating a potential risk for a fire. The consumer stated GM was not addressing the issue properly as the updated transmission lines were failing in the same location . Updated 02/16/10.
Failure of hose crimp in pressurized transmission cooler line. No replacement parts availability through dealers (10) or manufacturer, is indicative of a larger problem. Other hose failures have been confirmed, by other owners of both 2006 and 2007 model years. Possibility of catastrophic hose joint failure, at high speed, with possible resulting engine compartment fire or explosion. Has been confirmed by independent ase certified mechanic. Dealer representatives confirm (unofficially) that they are aware a problem exists with this line.
Tl contact owns a 2007 Chevrolet Silverado. While driving approximately 70 MPH, the contact stated that the transmission oil cooler failed, causing the vehicle to loose transmission fluid. The dealer informed the contact that the vehicle was not under warranty and that the transmission oil line cooler needed to be replaced. The manufacturer was contacted and the contact was awaiting a response. The vehicle was not repaired. The current and failure mileages were 67,674. The VIN was unavailable.
Transmission complaints in other Silverado 2500 years
Frequently asked questions
How common are transmission problems on the 2007 Chevrolet Silverado 2500?
NHTSA has 21 complaints about the transmission & drivetrain of the 2007 Chevrolet Silverado 2500, 10% of the model year's 204 complaints. The component named most often is automatic transmission (11 mentions).
Is there a recall for 2007 Chevrolet Silverado 2500 transmission problems?
No. NHTSA lists no transmission & drivetrain recall for the 2007 Chevrolet Silverado 2500, though it has 3 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2007 Chevrolet Silverado 2500 transmission problems start?
Half of the complaints with a recorded mileage happened before about 51,000 miles, and 30% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 0 injuries to transmission & drivetrain problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.