The 2007 STS-V packs a hand-built supercharged Northstar V8 with serious performance but suffers from catastrophic engine failures due to weak piston ring lands and oil starvation issues, plus transmission cooling problems that can kill the 6L80 if ignored.
Piston Ring Land Failure / Catastrophic Engine Damage
Common · high severity
Typical onset: 60,000-100,000 mi
Symptoms: Excessive oil consumption (1 qt per 500-1000 miles), Blue smoke on startup or under load, Loss of power and misfires, Metallic knocking from crankcase, Sudden catastrophic failure with complete loss of compression
Fix: The LC3 supercharged Northstar has notoriously weak piston ring lands that crack under boost and heat. Once ring lands fail, debris circulates and destroys bearings. Requires complete engine rebuild or replacement with updated pistons and rings. Figure 40-60 hours labor for in-frame overhaul or 25-35 hours for short block swap if you source a used unit.
Estimated cost: $8,000-15,000
Transmission Oil Cooler Line Failure
Common · high severity
Typical onset: 70,000-120,000 mi
Symptoms: Transmission fluid leaking near radiator area, Pink fluid puddles under front of vehicle, Transmission overheating warnings, Harsh or slipping shifts when fluid level drops
Fix: The steel cooler lines running to the radiator corrode and rupture, dumping ATF rapidly. If coolant mixes with transmission fluid through internal cooler failure, the 6L80 is toast. Requires replacement of cooler lines and often external cooler, plus full fluid flush. If contamination occurred, add transmission rebuild at 18-22 hours.
Estimated cost: $600-1,200
Rear Differential Pinion Seal and Axle Seal Leaks
Occasional · medium severity
Typical onset: 80,000-130,000 mi
Symptoms: Gear oil spots on driveway under rear end, Visible oil seepage at pinion yoke or axle tubes, Low differential fluid causing whine or howl during acceleration
Fix: The rear differential seals age out and leak, especially if fluid service was neglected. Pinion seal requires driveshaft removal and pinion nut torque spec adherence to avoid preload issues. Axle seals need axle removal. Budget 2-3 hours for pinion, 1.5 hours per side for axles.
Estimated cost: $400-800
Transmission Mount Collapse
Common · medium severity
Typical onset: 60,000-90,000 mi
Symptoms: Severe clunk when shifting from Park to Drive or Reverse, Vibration through chassis under acceleration, Visible sagging of transmission tailhousing, Driveline shudder during throttle tip-in
Fix: The transmission mount deteriorates from the torque of the supercharged V8 and allows excessive drivetrain movement. Replacement requires lifting transmission slightly to access mount bolts. Straightforward job at 1.5-2 hours but often discovered during other work.
Estimated cost: $250-450
Supercharger Coupler Wear and Intercooler Pump Failure
Occasional · medium severity
Typical onset: 80,000-120,000 mi
Symptoms: Whining or squealing from supercharger that changes with RPM, Loss of boost pressure, Reduced power output, Check engine light with boost underperformance codes, Coolant leaks from intercooler system
Fix: The Eaton M122 supercharger uses a rubber coupler that wears and can separate, causing loss of boost. Intercooler coolant pump fails and causes heat soak, killing performance. Coupler replacement requires supercharger removal at 8-10 hours. Intercooler pump is 2-3 hours but often done with coupler if supercharger is already off.
Estimated cost: $1,200-2,500
Fuel Filter Clogging and Fuel Pump Degradation
Occasional · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Hard starting especially when hot, Hesitation or stumbling under hard acceleration, Fuel pressure codes, Limp mode activation under boost
Fix: The in-tank fuel filter clogs over time and the high-pressure fuel system on this supercharged platform is sensitive to flow restrictions. Fuel pump assembly replacement requires tank drop at 3-4 hours. These cars demand premium fuel and clean filters to maintain proper fueling under boost.
Estimated cost: $600-1,000
Magnetic Ride Control Shock Failure
Occasional · low severity
Typical onset: 90,000-140,000 mi
Symptoms: Ride quality degradation or overly harsh ride, Magnetic ride warning on dash, Fluid leaks from shock bodies, Uneven handling or wallowing in corners
Fix: The Magnetic Ride Control shocks are expensive dealer-only parts that eventually fail. Fluid leaks or internal electronics die. Can replace with conventional shocks and reprogram module or bite the bullet on OE magneto-rheological units at $800+ each. Labor is 2-3 hours per pair.
Estimated cost: $2,000-4,000
Owner tips
Change engine oil every 3,000-4,000 miles with quality synthetic to combat ring land heat stress and oil consumption
Install aftermarket auxiliary transmission cooler to prevent 6L80 overheating and extend transmission life
Monitor oil consumption religiously - if you're adding more than 1 quart between changes, start budgeting for engine work
Replace supercharger coupler preventively around 80k miles before it grenades
Keep premium fuel in the tank and replace fuel filter every 50k miles to maintain proper fueling under boost
Only buy if you can afford a $10k+ engine rebuild as preventive maintenance or find one with documented recent engine work and auxiliary transmission cooling already installed.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: Battery located in trunk; high-performance supercharged V8 requires AGM battery for increased power demands
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Every control module on the 2006-2009 Cadillac STS-V — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
📍 Trunk area, driver side, mounted to body structure near tail lamp
🔧 Tech 2 or Autel
⚠️ Sensor calibration may be required; rear parking sensors only on STS-V
Seat Control Module (SCM)0.6 hr R&Rrelearn only +0.1 hr▸ programming details
📍 Under driver and passenger seats, mounted to seat frame
🔧 Tech 2
⚠️ Memory seat position relearn required; heated/cooled seat functions
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
General Motors LLC (GM) is recalling certain model year 2004-2007 Cadillac CTS-V vehicles manufactured October 6, 2003, to March 15, 2007, and 2006-2007 Cadillac STS-V vehicles manufactured June 23, 2005, to March 15, 2007. In the affected vehicles, the electrical terminals of the fuel pump module may overheat resulting in the melting of the flange material.
Consequence: If the flange melts, a hole may be created allowing the fuel pump to leak fuel, causing the vehicle to stall, increasing the risk of a vehicle crash. Additionally, leaking fuel in the presence of an ignition source increases the risk of a fire.
Remedy: GM will notify owners, and dealers will replace the fuel module and fuel tank jumper harness, free of charge. GM sent out interim notices in late October. The recall began on March 12, 2015. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 14405.
POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT:SEAL · 07V589000
2007-12-20 · PE07037
ON CERTAIN PASSENGER VEHICLES, THE REAR AXLE PINION SEAL DOES NOT MEET ALL OF THE SPECIFICATIONS AND MAY EXPERIENCE A FLUID LEAK.
Consequence: A REAR DIFFERENTIAL FAILURE MAY CAUSE LOSS OF MOTIVE POWER AND POSSIBLY LOSS OF CONTROL INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL REPLACE THE PINION SEAL FREE OF CHARGE. THE RECALL BEGAN ON FEBRUARY 1, 2008. OWNERS MAY CONTACT CADILLAC AT 1-800-458-8006 OR HTTP://WWW.CADILLAC.COM; PONTIAC AT 1-800-620-7668 OR HTTP://WWW.PONTIAC.COM; AND SATURN AT 1-800-972-8876 OR HTTP://WWW.SATURN.COM.
Performance
Horsepower
469hp
Torque
439lb-ft
0–60 mph
4.6sec
Quarter mile
13.0sec
Top speed
175mph
Fuel economy (EPA)
City
12mpg
Highway
19mpg
Combined
15mpg
Fuel
Premium Gasoline
Capability & size
Curb weight
4,270lb
EPA class
Midsize Cars
Wiper blades
Performance variant shares same wiper specifications as base STS. Sedan body style, no rear wiper.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2007 Cadillac STS-V 4.4L Supercharged V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.