The 2007 Rendezvous on GM's versatile crossover platform suffers from chronic 3.5L engine failures (intake manifold gasket leaks leading to catastrophic bearing damage) and transmission cooling issues that can destroy the 4T65-E transaxle if ignored.
3.5L V6 Intake Manifold Gasket Failure Leading to Engine Damage
Common · high severity
Typical onset: 80,000-140,000 mi
Symptoms: Coolant loss with no external leaks, needing frequent top-offs, White exhaust smoke on cold start, Milky/chocolate milk appearance in oil or oil cap, Check engine light with misfire codes, Catastrophic bearing knock if coolant contaminates oil and owner keeps driving
Fix: If caught early, it's 8-10 hours for intake gasket replacement ($800-1,200). If coolant mixed with oil and bearings are damaged, you're looking at either complete engine rebuild (25-35 hours) or used engine swap (12-16 hours). Many owners discover this too late because early symptoms are subtle.
Estimated cost: $800-1,200 (gasket only) or $4,500-7,500 (engine rebuild/replacement)
Transmission Oil Cooler Line Failure and Internal Cooler Contamination
Common · high severity
Typical onset: 90,000-150,000 mi
Symptoms: Pink or red fluid dripping from radiator area, Transmission slipping or delayed engagement after cooler leak, Strawberry milkshake appearance in coolant reservoir (coolant/ATF mixing), Transmission overheating warning or limp mode
Fix: External cooler lines rust through and leak (2 hours to replace lines, $250-400). The killer is internal radiator cooler failure allowing coolant into transmission—requires new radiator, transmission flush or rebuild, and all cooler lines. If coolant entered trans, rebuild is 12-16 hours; many techs recommend replacing rather than rebuilding a contaminated unit.
Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration felt through steering wheel at idle, Visible engine/trans movement when revving in Park, Harsh engagement into gear
Fix: The front transmission mount (which also supports the engine on this transverse setup) is hydraulic and fails internally. Replacement is straightforward but requires supporting the powertrain—about 2-3 hours labor. Use OEM or quality aftermarket; cheap mounts fail in 20,000 miles.
Estimated cost: $350-550
Power Steering Pump Failure and High-Pressure Hose Leaks
Occasional · medium severity
Typical onset: 100,000-160,000 mi
Symptoms: Whining or groaning noise when turning, especially when cold, Stiff or heavy steering intermittently, Power steering fluid leak from pump or high-pressure hose, Burning smell from fluid on exhaust manifold
Fix: Pump replacement is 2-3 hours; high-pressure hose (which runs near the exhaust and cooks) is another 1.5-2 hours. Often both go around the same time. Flush system when replacing pump to clear debris. This isn't catastrophic but steering gets dangerously heavy if pump seizes.
Estimated cost: $450-750
HVAC Blend Door Actuator Failure
Common · low severity
Symptoms: Clicking or ticking noise from behind dashboard, especially on startup, Heat or AC blowing from wrong vents, Temperature control not responding or stuck on one setting, Constant clicking when adjusting climate controls
Fix: Multiple actuators control airflow; the upper blend door actuator is the most common failure. Accessible from under the dash without removing it entirely—about 1.5-2 hours labor. The clicking drives owners insane but doesn't affect driveability.
Estimated cost: $250-400
ABS Wheel Speed Sensor Corrosion (Rear)
Occasional · medium severity
Typical onset: 80,000-140,000 mi
Symptoms: ABS light illuminated with codes C0035-C0050 (wheel speed sensor range/performance), Traction control or StabiliTrak disabled warnings, ABS pump cycling erratically during normal braking, Occasional false ABS activation on dry pavement
Fix: Rear wheel speed sensors corrode where they mount to the bearing hub. Sensor replacement is simple (0.5-1 hour per side), but if ignored, can require new hub bearing assembly (2-3 hours per side). Front sensors less problematic. This is a rust-belt special.
Estimated cost: $150-250 (sensor) or $400-650 (hub bearing)
Owner tips
Change coolant every 3 years religiously and watch for slow losses—catching intake gasket leaks early saves engines on the 3.5L
Service transmission fluid every 50k miles with full flush; inspect cooler lines for rust annually if in salt states
If buying used, pull dipstick and check for milkshake in coolant reservoir as first inspection step
The 3.4L is more durable than the 3.5L—avoid the 3.5L if you have a choice
Avoid the 3.5L V6 models unless you have documented proof of recent intake gasket replacement and clean transmission service history—these two issues bankrupt otherwise decent $3,000-5,000 crossovers.
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: Side post terminals standard on GM vehicles
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Every control module on the 2002-2007 Buick Rendezvous — 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.
Electronic Brake Control Module (EBCM)1.8 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Engine compartment, driver side inner fender area, mounted to ABS hydraulic unit
🔧 GM Tech 2
⚠️ Brake bleeding and automated bleed procedure required after replacement; no VIN programming needed
Body Control Module (BCM)1.5 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Behind center console, below radio/HVAC assembly, accessible from passenger side
🔧 GM Tech 2 with TIS2000/SPS
⚠️ VIN programming required; controls PassLock II theft deterrent; must perform 10-minute relearn after programming
📍 Under driver seat, mounted to seat frame (when equipped)
🔧 Manual reprogramming
⚠️ Optional on CXL models; memory positions must be manually reset by driver after replacement
Transmission Control Module (TCM)no coding
📍 Integrated within PCM (4T65-E transmission)
⚠️ TCM function integrated into PCM; no separate module
Theft Deterrent Module (TDM)no coding
📍 Function integrated within BCM
⚠️ PassLock II system integrated into BCM; no separate module
Electronic Power Steering Control Module (PSMC)no coding
📍 Not equipped - hydraulic power steering only
⚠️ Rendezvous uses conventional hydraulic power steering; no electronic module
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.
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 Buick Rendezvous 3.6L V6 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.