This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
full bulletin at NHTSA ↗2006 Hummer H3 brakes problems
severe 15 complaints filed with NHTSA · avg repair $450 · see brakes across all vehicles →
Failure mileage
Complaints
15
Recalls
0
Avg fix
$450
3crashes
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering brakes on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
full bulletin at NHTSA ↗This informational bulletin provides technicians with a brake lathe calibration procedure.
full bulletin at NHTSA ↗This informational bulletin provides technicians with a brake lathe calibration procedure.
full bulletin at NHTSA ↗This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Code P0442. Technician will need to review Techlink article from May 2013 titled "Using the Evaporative Emissions System Tester" Technician will need to follow these steps to help diagnose the issue. First after the P0442 has been verified do not disturb any of the fuel system components. The technician now can use the scan tool to close the Evaporative Emissions System. If possible change the tank pressure sensor units from inch_H2O to milimeter_Hg for better resolution. Now the vehicle can be star
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners describe two primary brake system problems: ABS failures tied to wheel speed sensor malfunctions, and complete brake system failures. In the ABS failures, the computer applies full braking force without driver input based on bad sensor data, causing sudden loss of control at speeds from 40 to 65 mph. Some owners experienced this multiple times over days, and dealers replaced various sensors across separate visits—yet the problem recurred. One owner reported three separate failures over three months with different sensors identified each time.
For complete brake failure, owners report the brake pedal either sinking to the floor or becoming unresponsive entirely, forcing reliance on downshift and emergency brake. One case involved cracked brake lines on both sides at 11,832 miles. Another owner had a collision because brakes failed four times, and the dealer could not identify the root cause.
A third issue involves the left rear caliper locking up, preventing motion or causing uncontrolled spinning at 55 mph. Additionally, multiple owners cite a design hazard: the brake and accelerator pedals are spaced too close together, causing shoe heels to snag on the brake pedal during emergency maneuvers. GM stated no fix is planned for this spacing issue.
Failure modes owners describe
ABS system unintended activation due to wheel speed sensor failure
Wheel speed sensor malfunction triggers false data to the ABS/traction control computer, causing the system to apply full braking force without driver input. Owners report abrupt, firm braking and loss of vehicle control.
When: 37,000–96,000 miles; multiple occurrences reported within minutes to days of initial failure
Symptoms owners cite: Sudden firm braking with no pedal depression; Loss of vehicle control, sliding or spinning; ABS warning light illumination; Traction control failure messages on dash; Vehicle stalling or jerking violently
Codes mentioned: ABS failure code (unspecified), Traction control failure
Repairs/costs cited: Wheel speed sensor replacement (left rear or other location). Multiple owners report replacement of different sensors across multiple service visits with recurring failures.
Recalls/TSBs owners mention: Warranty coverage for sensor replacement documented in narratives; no recall or TSB mentioned.
Brake system complete failure—no pedal pressure
Brake pedal becomes unresponsive or loses pressure, forcing drivers to rely on downshift and emergency brake. One case involved cracked brake lines on both sides of vehicle.
When: 9,000–45,000+ miles
Symptoms owners cite: Brake pedal sinks to floor with no resistance; No braking response when pedal is depressed; Vehicle continues to accelerate despite brake input; Brake warning light illumination (in some cases); No warning prior to failure in some instances
Codes mentioned: Brake warning lamp
Repairs/costs cited: Brake line replacement documented (cracked on both sides). One owner involved in collision due to brake failure. Dealer unable to pinpoint root cause in one case despite four repair attempts.
Recalls/TSBs owners mention: No recall or formal TSB noted; warranty repairs performed at dealership.
Caliper lockup—left rear
Left rear brake caliper locks up during normal driving, preventing forward motion or causing sudden uncontrolled braking at highway speed.
When: 50,000–55,000 miles
Symptoms owners cite: Vehicle will not move forward when accelerating; Sudden lockup at 55 mph causing uncontrolled spin; Left rear caliper does not release
Repairs/costs cited: Caliper replacement under warranty. Failure recurred after repair; part location pending at time of complaint.
Recalls/TSBs owners mention: Warranty coverage for initial replacement; no further action documented.
Brake pedal and accelerator pedal spacing hazard
Brake pedal positioned too close to accelerator pedal, causing shoe/boot heel to snag on the rear of the brake pedal during emergency braking attempts.
When: At point of sale/test drive; 8,000 miles
Symptoms owners cite: Shoe or boot heel hangs up on back of brake pedal; Requires sideways foot motion to disengage pedal; Risk of unintended acceleration in emergency situations
Repairs/costs cited: Design flaw; owner states cannot be fixed independently. No repair documented.
Recalls/TSBs owners mention: GM replied that there is no plan to fix this defect (per owner account).
ABS-related braking hesitation
Traction control or ABS activation causes hesitation or delayed braking response, preventing smooth deceleration.
When: 160,000 miles (one case); timing unclear in another
Symptoms owners cite: Hesitation to stop during normal braking; Traction warning lamp illumination; Brake response delay
Codes mentioned: Traction warning lamp
Repairs/costs cited: No repair performed in documented case.
Excessive front brake wear
Premature brake pad/rotor wear at low mileage (16,000 miles) noted by mechanic.
When: 16,000 miles
Symptoms owners cite: Excessive wear on front brake pads/rotors
Repairs/costs cited: Mechanic observation; no repair documented at time of complaint.
Synthesized from 15 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had brakes trouble with your 2006 Hummer H3?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the brakes problem on the 2006 Hummer H3?
It's a meaningful issue. 15 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $450.
At what mileage does the brakes typically fail?
Across the 12 complaints that reported odometer mileage, most brakes failures cluster between 24,000 and 68,000 miles, with the median around 45,057. A quarter of owners report trouble before 24,000; a quarter make it past 68,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $450 for brakes repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to brakes?
No active recalls currently cover brakes issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2006/Hummer/H3.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.