This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
full bulletin at NHTSA ↗2008 Cadillac CTS brakes problems
severe Owners of the 2008 Cadillac CTS have filed 14 NHTSA complaints about the brakes, typically surfacing around 52,000 miles at roughly $450 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See brakes across all vehicles →
Failure mileage
Complaints
14
Recalls
0
Avg fix
$450
| Model year | brakes complaints |
|---|---|
| 2005 CTS | 24 |
| 2006 CTS | 48 |
| 2007 CTS | 42 |
| 2008 CTS (this page) | 14 |
| 2009 CTS | 6 |
| 2012 CTS | 6 |
3crashes
1injury
When does it fail?
Of the 14 brakes complaints filed for the 2008 Cadillac CTS, 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
No new NHTSA brakes complaint has been filed on this vehicle in over 12 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 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 ↗This service bulletin provides information for tire pressure monitoring (TPM) system concerns.
full bulletin at NHTSA ↗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 information on a hard brake pedal caused by low engine vacuum during warm up.
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 main brake-system problems. First, the brake booster and auxiliary vacuum pump fail intermittently—typically after sitting overnight or in cold conditions—making the brake pedal hard to depress and increasing stopping distance. At 46,000–59,000 miles, owners have had these components replaced, sometimes multiple times, yet failures persist. Cadillac issued Technical Service Bulletin 07-05-22-003 for auxiliary vacuum pump installation, but the fix did not always resolve the issue.
Second, persistent brake squealing or squeaking has plagued owners from delivery through months of ownership. Dealerships replaced brake pads and suggested highway brake riding to clean rotors—neither worked. Cadillac acknowledged awareness of the squeal but declined to authorize ceramic brake replacement, claiming parts were unavailable for the CTS.
Beyond the brake booster, owners report complete electrical system shutdowns while driving—losing engine power, brakes, and steering simultaneously. Root causes ranged from PCM replacement to corroded driver-side wiring. One narrative documents light snow exposure triggering brake-assist and ABS warnings after just 25 feet of driving. One early owner (1,500 miles) alleged the vehicle accelerated through brake pressure, causing a collision. While dealerships could not reproduce most failures, the pattern suggests systemic electrical or brake-system vulnerability across multiple examples.
Same Cadillac CTS brakes reports on nearby years: 2005 · 2006 · 2007
Failure modes owners describe
Electrical system shutdown affecting brakes and engine
Complete loss of electrical power to engine, brakes, steering, and brake warning systems while driving. Vehicle loses all propulsion and brake assist, becoming immobile.
When: Multiple incidents within 6-month period in narratives #1 and #3; #1 at 5-10 mph in parking garage and on exit ramp; #3 while driving at unspecified speeds
Symptoms owners cite: Engine shuts down while driving; Loss of braking power; Loss of power steering; All system warning lights illuminate (ABS, Stabiltrack, Engine, brake assist); Vehicle will not restart immediately after shutdown; Engine idle issues and fuel gauge malfunction preceding shutdown
Codes mentioned: ABS warning, Stabiltrack warning, Engine warning, Service brake assist warning
Repairs/costs cited: Narrative #1: PCM replacement (~$200) initially unsuccessful; electrical wiring on driver's side from front to back replaced (~$800). Narrative #3: Fuel pump replaced, fuel gauge replaced; dealer unable to diagnose root cause.
Brake booster and auxiliary vacuum pump failure
Brake booster malfunction causing hard brake pedal engagement and extended stopping distance, particularly when shifting into reverse or after vehicle sits overnight. Auxiliary vacuum pump fails intermittently.
When: Narrative #2: 52,000 miles; Narrative #4: 46,134 miles; Narrative #5: 59,280 miles
Symptoms owners cite: Hard brake pedal requiring multiple pumps to stop vehicle; Extended stopping distance (25 mph stop required multiple pedal pumps); Abnormal stopping distance when reversing; Difficulty engaging brakes after vehicle sits overnight
Repairs/costs cited: Vacuum pump replacement (Narrative #2, #5). Auxiliary vacuum pump replaced with system kit (Narrative #5). Bulletin 07-05-22-003 references auxiliary vacuum pump installation (Narrative #4).
Recalls/TSBs owners mention: Bulletin 07-05-22-003 for auxiliary vacuum pump installation. Narrative #2: Manufacturer notified; vacuum pump replaced but failure continued.
Brake squeal and noise
Persistent high-pitched squeaking or squealing from brake system when brakes are applied, present from early ownership and unresolved by dealership repair attempts.
When: Narratives #7, #8, #9, #11, #13: Issues began within weeks to months of delivery; #7 after ~1 year of ownership; #8 from September 15, 2008 delivery; #9 few weeks after purchase; #11 by 6,000 miles; #13 at 3,500 miles, 4 months old
Symptoms owners cite: Persistent brake squeaking or squealing with every brake application; Noise continues despite brake pad replacement; Noise continues despite highway brake riding to clean rotors
Repairs/costs cited: Narrative #7: Rear brake pads replaced, temporary improvement then issue returned. Narrative #9: Owner advised to ride brakes on highway—did not resolve. Narratives #8, #13: No repair parts authorized.
Recalls/TSBs owners mention: Narrative #8: Cadillac aware of brake squeal but had not authorized ceramic brake replacement; ceramic brakes not available for CTS model. Narrative #13: No parts available from GM as of January 2009.
Wiring vulnerability to moisture and snow
Electrical wiring exposed or poorly sealed, allowing moisture from light snow accumulation to cause loss of critical vehicle functions and activate multiple warning systems.
When: Narrative #6: After driving on street with 2-inch snow cover, after approximately 25 feet
Symptoms owners cite: 4WD system warning; Anti-lock braking system warning; Service stability traction system warning; Service brake assist warning
Codes mentioned: 4WD warning, Anti-lock braking system warning, Stability traction system warning, Brake assist warning
Unintended acceleration while braking
Vehicle accelerates despite brake pedal being depressed, resulting in collision. Low mileage at failure suggests possible manufacturing or assembly defect.
When: Narrative #10: 1,500 miles, 2 mph speed at time of incident
Symptoms owners cite: Vehicle accelerates while brake pedal is depressed; Collision with preceding vehicle
Repairs/costs cited: Front bumper replacement required.
Synthesized from 14 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
I was driving and heading on a curve I didn't see that it was 25 MPH and I was going about 45 and I brake and I slid, hit a tree about three fists thick slide on my drivers side which is completely smushed in and rolled over and fell straight into a ditch up side down. *tr
Had brakes trouble with your 2008 Cadillac CTS?
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 2008 Cadillac CTS?
It's a meaningful issue. 14 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 6,000 and 70,000 miles, with the median around 52,000. A quarter of owners report trouble before 6,000; a quarter make it past 70,000. 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/2008/Cadillac/CTS.
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.