This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its own at a full turn.
full bulletin at NHTSA ↗2007 GMC Sierra brakes problems
severe 44 complaints filed with NHTSA · avg repair $450 · see brakes across all vehicles →
Failure mileage
Complaints
44
Recalls
0
Avg fix
$450
4crashes
2injuries
When does it fail?
Of the 44 brakes complaints filed for the 2007 GMC Sierra, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 44 brakes complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA brakes complaint has been filed on this vehicle in over 14 years — the issue may be aging out of the active population.
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 informational bulletin provides technicians with a brake lathe calibration procedure.
full bulletin at NHTSA ↗CHEVROLET/GMC/CADILLAC: ANYTIME HYDRAULIC BRAKE PIPES ASSEMBLY NEED REPLACING, PRE-FORMED AND PRE-FLARED BRAKE PIPES ARE AVAILABLE, EXCEPT REAR AXLE CROSSOVER PIPE. MODEL 1999-2007 SILVERADO, SIERRA, 2000-2006 ESCALADE MODELS, AVALANCHE, SUBURBAN, TAHOE, YUKON MODELS. UPDATED 7/18/14. UPDATED 12/9/14.
full bulletin at NHTSA ↗This warranty administration bulletin provide policy information on a revised customer concern not duplicated/verified labor operation numbers and how to submit CCND.
full bulletin at NHTSA ↗This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its own at a full turn.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The dominant complaint is premature brake line corrosion and rupture. Owners describe hard brake lines rusting through and bursting at 30,000 to 80,000 miles, causing complete brake fluid loss and total brake failure with no advance warning. The failures happen on well-maintained trucks kept in low-salt climates and even in Florida. Multiple lines often show severe corrosion simultaneously. Brake pedal drops to the floor with zero stopping power; owners have used emergency brakes, downshift to neutral, or emergency trailers to avoid collisions. Repair costs run $300 to $2,400 for full line replacement. GM issued service bulletins but has not recalled the 2007 model year, though recalls exist for earlier years. Dealers have offered discounted parts but charged full retail price.
A secondary issue is ABS activating inappropriately during low-speed stops below 5 mph on both uneven and normal road surfaces, extending stopping distance unexpectedly. This is documented across 1999–2007 GM pickups and SUVs, yet the 2007 model year has no recall. Service advisors recommend pulling the ABS fuse, which disables the system entirely.
Brake light switches malfunction: lights turn off when the pedal is released slightly, even though brakes remain applied. Multiple switch replacements at dealerships fail to fix the defect, and GM denies any problem exists.
Same GMC Sierra brakes reports on nearby years: 2005 · 2006 · 2008
Failure modes owners describe
Brake line corrosion and rupture
Hard brake lines rust and corrode prematurely, leading to rupture and complete brake fluid loss. Owners report this happening at very low mileages and without prior warning, even in low-salt environments and on well-maintained vehicles. Multiple lines often show advanced corrosion simultaneously.
When: 32,000–217,000 miles, most commonly 30,000–80,000 miles
Symptoms owners cite: Brake pedal drops to floor with no braking action; Complete loss of brake fluid; Visible rust and corrosion on hard brake lines; Brake fluid leaking onto driveway or garage floor
Repairs/costs cited: Replacement of all corroded brake lines required; costs range from $300 to $2,400 depending on extent of damage. Some owners reported dealers installed stainless steel replacement lines or coated lines as warranty repair, while others paid full retail price.
Recalls/TSBs owners mention: GM has issued service bulletins but has not issued a recall for the 2007 model year in most cases, despite recalls on some earlier years. Some owners were offered discounted parts pricing ($500) but were charged full price ($1,667) at dealer. Warranty denied on out-of-service vehicles.
ABS system activating at low speed
Anti-lock brake system engages inappropriately during low-speed stops on both uneven and normal road surfaces, causing the vehicle to take longer to stop than normal and creating safety hazards. Owners report this is a known issue affecting multiple model years (1999–2007 GM pickups and SUVs).
When: Occurs randomly during low-speed braking; some failures reported as early as 12,000 miles, others at 50,000+ miles
Symptoms owners cite: ABS activates when braking at speeds below 5 mph; Brake pedal vibrates abnormally during light braking; Extended stopping distance compared to normal braking; ABS warning light may illuminate; Unpredictable; happens without warning
Codes mentioned: ABS warning light illumination
Repairs/costs cited: GM service advisors recommended pulling the ABS fuse to eliminate the problem, which disables the ABS system entirely. Some dealers replaced front wheel ABS sensors and cleaned mounting surfaces at owner expense with limited success. Some complaints report dealer was unable to duplicate the failure during diagnostic testing.
Recalls/TSBs owners mention: GM issued a service bulletin but no recall for the 2007 model year, despite prior recalls on certain years. Manufacturer claims no knowledge of widespread issue when contacted by owners.
Brake light switch malfunction
Brake lights turn off when the brake pedal is depressed only slightly, even though brakes are still applied. Lights should illuminate whenever brakes are pressed. Dealership diagnostics and replacement of the brake light switch do not resolve the problem; all vehicles on dealer lot exhibit the same defect.
When: Occurs during normal braking operations; no specific mileage reported
Symptoms owners cite: Brake lights turn off when pedal is released even a fraction of an inch; Brake lights flicker or go completely dark during moderate braking; At highway speeds (70 mph), lights do not work 95% of the time; Lights require full pedal depression to activate; Brake lights do not work with ignition off
Repairs/costs cited: Multiple brake light switch replacements (2–6 times) at Chevy and GMC dealers did not resolve the issue. Owner improvised by hooking up a dash light as backup indicator.
Recalls/TSBs owners mention: Manufacturer told owner there is no problem with brake lights on these vehicles and refused to acknowledge the defect.
Incorrect speedometer calibration causing ABS malfunction
Improper speedometer calibration after installation of aftermarket lift kit and oversized tires renders the anti-lock brake system inoperative. Dealer installed parts without recalibrating the speedometer or warning customer of safety impact.
When: Discovered shortly after vehicle purchase with aftermarket modifications
Symptoms owners cite: Speedometer not calibrated correctly; ABS system not functioning properly as a result; No warning to customer of safety impact
Repairs/costs cited: Dealership service manager confirmed that speedometers cannot be calibrated correctly on modified vehicles, leaving ABS non-functional.
Recalls/TSBs owners mention: Dealership willfully sold vehicles with faulty ABS without regard for customer safety or warning.
Front brake caliper seizure
Factory brake calipers seize, causing front wheels to drag and skip. Original equipment part failure.
When: No specific mileage provided in narrative
Symptoms owners cite: Front wheels drag; Front wheels skip; Front inner brake pads seize into calipers
Synthesized from 44 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Brakes failed, vehicle brought to a stop using 1st gear and parking brake, narrowly avoiding accident. Parked in parking lot and brake fluid drained to pavement. Dealer advises replacement of all brake lines as all are severely corroded (estimated cost - $2,400). Vehicle is exactly 5 years old with not many miles. Used in canada in the summer and florida in winter months. Only exposure to…
I purchased a brand new 2007 GMC sierra 1500 pickup from lone star Pontiac Buick GMC in mckinney, texas on 11/18/06. Only after being pulled over for speeding did I realize the speedometer was not calibrated correctly after the dealership had installed an after-market lift kit and large tires and wheels on this truck. I discovered by calling another gm dealer that because the speedometer is not…
Had brakes trouble with your 2007 GMC Sierra?
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 2007 GMC Sierra?
It's a meaningful issue. 44 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 41 complaints that reported odometer mileage, most brakes failures cluster between 36,000 and 86,000 miles, with the median around 60,000. A quarter of owners report trouble before 36,000; a quarter make it past 86,000. 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/2007/GMC/Sierra.
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.