2006 Chevrolet Silverado 2500 Problems

What owners report

Owners of this model year most often describe two brake-related problems: brake lines that rust through and leave the pedal on the floor, and the ABS engaging during slow stops so the truck does not stop where expected. Transmission and oil cooler line leaks are also a recurring theme, especially on diesel trucks, and many complaints note general underbody corrosion as the underlying condition.

1. 1
   Brakes

   Rusted-through brake lines and loss of braking

   • 64 complaints (36%)
   • median 57,221 mi at 7.4 yrs old (62 state mileage)
   • 8 mention a crash, fire or injury
   • owner-quoted repair $800 (median of 10 quotes)
   • filed 2005–2018

   Complaints describe the brake pedal dropping to the floor with little or no warning, often followed by a puddle of fluid and a rusted or pinhole line under the cab or along the frame. Owners frequently report one line failing and other lines being found heavily corroded at the same time; some say the dealer replaced the whole set or quoted a complete brake line kit. Several mention reduced braking while towing or backing out, and that the dealer described the corrosion as a known condition for this model. Reported from roughly 23,000 to 200,000 miles, with many between 40,000 and 100,000 miles, on trucks used in snowy or road-salt conditions.

   What to check: Have the steel brake lines inspected along the frame and above the rear axle, and ask whether any lines have been replaced. Look for pitting, flaking or wet spots on the lines and at the ABS module.

   2 excerpts from owner complaints in NHTSA records

   “I purchased 2006 silverado new and after the 1st year noticed rusting. Just before it came off warranty (2009) the coolant line from the radiator and the brake rotors (front and rear) had rusted through. Have since replaced the rotors again and now my brake line burst open as I was driving home. …”

   NHTSA complaint #10463449, filed 2012-06, 26,000 miles

   “At the worst possible time with icy roads and snow. I was on my driveway trying to get to the top off it when I lost traction. I stopped and applied the brakes. I started to back down the drive when the peddle fell to the floor causing the truck to go violently out of control and crash down over an embankment. There was no warning, just total loss of brakes both front and rear. Mechanic says the lines blew apart from rust.”

   NHTSA complaint #10495309, filed 2013-01, 65,500 miles
2. 2
   Transmission and drivetrain

   Transmission and oil cooler line leaks

   • 22 complaints (12%)
   • median 44,000 mi at 4.1 yrs old (21 state mileage)
   • 3 mention a crash, fire or injury
   • filed 2008–2014

   Complaints describe fluid leaking from the transmission cooler lines, and often from the oil cooler lines as well, sometimes within the first few tens of thousands of miles and again after replacement. Owners say the dealer replaced the lines and, in some cases, told them it is a common condition on these trucks. Some mention concern about fluid reaching hot exhaust parts. Typically reported under 65,000 miles, with several between about 20,000 and 60,000 miles, mostly on diesel trucks.

   2 related service bulletins

   What to check: Check for wet or seeping fittings and hoses at the transmission cooler and oil cooler lines, and look for fluid residue on the frame and underbody. Ask whether the lines have been replaced and when.

   2 excerpts from owner complaints in NHTSA records

   “My transmission cooler lines were leaking and I'm concerned about it due to the transmission fluid being a combustible material. If this material dripped onto a hot exhaust and ignited while parked in the attached garage of our home, it could pose a major safety hazard...not to mention it could do to the neighbors home being relatively close. Thank you for your time.”

   NHTSA complaint #10221234, filed 2008-03, 35,000 miles

   “2006 chevy silverado hd diesel with allison trans-- transmission cooler lines leaking, dealer said there has been no known problem. I searched online and found hundreds of similar complaints. So I was forced to pay $700 to have the lines replaced, which will probably end up leaking again. This is obviously a defect, as I have 3 other chevy trucks, none of which have ever leaked from the trans lines, and some are over 10yrs old.”

   NHTSA complaint #10372344, filed 2010-12, 23,000 miles
3. 3
   Brakes

   ABS activates during low-speed stops

   • 9 complaints (5%)
   • median 45,000 mi at 5.2 yrs old (9 state mileage, few)
   • filed 2009–2016

   Owners describe a bump or pulsing in the pedal just before a complete stop, at walking speeds on dry pavement, with the brakes releasing and the truck rolling further than expected. Some report that cleaning corrosion from the front wheel speed sensor mounts reduced the problem, and that the dealer either said the system was operating normally or attributed it to contaminated sensors. Complaints note the ABS warning light usually stays off. Mostly reported between about 30,000 and 80,000 miles, during low-speed stops on dry or mixed surfaces.

   What to check: Test a few slow, light-pedal stops in a parking lot and see whether the pedal pulses or the truck fails to come to a smooth stop. Ask whether the wheel speed sensors or their mounting surfaces have been cleaned or replaced.

   2 excerpts from owner complaints in NHTSA records

   “The ABS on my 2006 silverado activates on low speed stops on dry pavement causing the brakes to release. It is not the typical ABS action that most people are familiar with, where the brakes release and apply - it is the brakes releasing and not reapplying under pressure, while foot is on brake. I have gone through an intersection while towing a horse trailer and had many near-miss incidents coming into toll booths, stop signs and red lights. Have almost rear-ended vehicles because of this. This needs to be a recall item. …”

   NHTSA complaint #10410017, filed 2011-06, 80,000 miles

   “When coming to a stop a speeds of 10 MPH or less, brake pedal goes towards the floor as if the ABS is activating, causing loss of braking. It occurs on all types of driving surfaces and in all weather conditions. Problem has gotten worse with time. Dealership says there is no known problem... However the internet says differently! Problem occurs almost every time you are making a slow approach to a stop, which is usually when other vehicles or pedestrians are in front of you.”

   NHTSA complaint #10482774, filed 2012-10, 30,000 miles
4. 4
   Body and structure

   Underbody and frame corrosion

   Mentioned in 4 of 60 sampled complaints

   Owners report rust forming on the frame, bumpers, wheels, bed and inner door areas, with some describing frame metal peeling in layers. In several complaints the corrosion is what led to the brake line failures described above; others mention corroded fuel tank sending unit parts and coolant lines. Reported from about 26,000 to 64,000 miles in several complaints, with owners noting rust appearing within the first few years.

   What to check: Inspect the frame rails, cab corners, bumpers and fuel tank area for flaking or layered rust, and ask about the truck's history in road-salt states.

   2 excerpts from owner complaints in NHTSA records

   “Master cylinder reservoir fluid level dropped from full to activation of brake service light. Investigation of the cause LED to the discovery a leak in the brake line from the anti lock brake actuator to the right front brake caliper. All the brake lines appear to be extensively corroded.”

   NHTSA complaint #10563670, filed 2014-02, 47,850 miles

   “The contact owns a 2006 Chevrolet SILVERADO 2500. The contact stated that there was corrosion on the frame of the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 64,000.”

   NHTSA complaint #10701700, filed 2015-03, 64,000 miles
5. 5
   Engine cooling

   Exhaust manifold bolts breaking

   • 9 complaints (5%)
   • median 40,500 mi at 5.3 yrs old (8 state mileage, few)
   • 2 mention a crash, fire or injury
   • filed 2007–2019

   Owners report broken exhaust manifold bolts on the 6.0 engine, sometimes on both sides, with exhaust smell entering the passenger compartment and repair quotes in the thousands of dollars. Complaints note the truck was otherwise unmodified and had no prior engine work. Reported from about 40,000 to 147,000 miles.

   1 related service bulletin

   What to check: Listen for a ticking exhaust leak at cold start near the manifolds and check for exhaust smell in the cab; ask whether manifold bolts have been replaced.

   2 excerpts from owner complaints in NHTSA records

   “Gm mad a faulty bolt design and no one is holding them accountable. I have 3 broken manifold bolts and the dealership wants $2100 to repair. There are thousands upon thousands of others just like me who are helpless. Why are you and the epa doing nothing? The vehicle can't pass emissions like this!”

   NHTSA complaint #10716594, filed 2015-05, 147,000 miles

   “Upon starting my truck, the oil pressure gauge immediately goes to 80 with no acceleration. At this point, there is no noise or other lights coming on to warn of other problems. This problem started a few days ago. When truck is in motion the oil pressure gauge continues to stay on 80. I know the 2006 chevy 2500 heavy duty 4x4 have had recalls on different things, but need to see if this is a problem for other chevy trucks as well. …”

   NHTSA complaint #11073907, filed 2018-02, 100,000 miles

Buying note. Given how often brake line corrosion and low-speed ABS behavior show up in complaints, a pre-purchase inspection focused on the brake lines, frame and underbody is worthwhile, and it is worth confirming whether cooler lines have already been replaced. Service records showing brake line and transmission line work reduce the chance of inheriting these repairs.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.