The 2004 Rendezvous is a FWD/AWD crossover sharing GM's 3400/3500 V6 platform with notorious intake manifold gasket issues and a 4T65-E transmission prone to cooler line leaks and internal wear. These two systems dominate the failure profile.
Intake Manifold Gasket Failure (3.4L V6)
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: External coolant leaks at front/rear of engine, White smoke from exhaust on cold start, Coolant loss with no visible external puddle, Rough idle or misfire from coolant entering cylinders
Fix: Replace upper and lower intake gaskets, typically 6-8 hours labor. Often discover warped intake plenum requiring machining or replacement. Smart techs do coolant elbows and thermostat housing at same time since they're plastic and accessible. Dexcool system must be flushed.
Estimated cost: $800-1,400
Transmission Oil Cooler Line Leaks
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: Transmission fluid dripping near radiator, Pink fluid on ground under front of vehicle, Burned transmission smell, Slipping gears or delayed engagement from low fluid
Fix: Steel cooler lines rust through where they connect to radiator or transmission. Quick-fix is splice-in rubber hose section (1 hour), but proper repair replaces entire hard line assemblies (2-3 hours). Buried behind subframe and A/C lines. Always check for internal transmission damage if ran low on fluid.
Estimated cost: $300-700
4T65-E Transmission Failure
Common · high severityTypical onset: 100,000-150,000 mi
Symptoms: Harsh 1-2 or 2-3 shifts, Slipping under load especially in 2nd gear, Shuddering during light acceleration, No reverse or delayed reverse engagement
Fix: Input shaft splines wear, 2nd gear clutches burn, and pressure control solenoid issues plague this transmission. Rebuild runs 12-16 hours, remans available but quality varies. Many owners opt for used units given vehicle value. Fluid changes every 50k help but don't prevent inevitable wear.
Estimated cost: $2,200-3,800
Lower Engine Failure (3.4L)
Occasional · high severityTypical onset: 120,000-180,000 mi
Symptoms: Loud knocking from bottom of engine, Metal shavings in oil, Sudden loss of oil pressure, Catastrophic failure after overheating event
Fix: Connecting rod bearings fail from Dexcool sludging and inadequate oil change intervals. Repair requires complete lower-end rebuild or replacement (20-25 hours). Usually not economical given vehicle value. Caused by combination of intake gasket leaks allowing coolant contamination and extended oil change intervals.
Estimated cost: $3,500-5,500
Power Window Regulator Failure
Common · low severityTypical onset: 70,000-120,000 mi
Symptoms: Window drops into door with loud pop, Window moves slowly or won't go up, Grinding noise when operating window, Window sits crooked in door frame
Fix: Plastic window regulators crack and cables fray. Driver side fails first, then passenger. Requires door panel removal and regulator replacement (1.5-2 hours per door). Aftermarket regulators acceptable but get ones with metal brackets.
Estimated cost: $250-400
AWD Transfer Case Fluid Leak
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Gear oil dripping from center of vehicle, Grinding or whining from transfer case on turns, AWD warning light illuminated, Binding sensation during tight turns
Fix: Output shaft seals leak on AWD models. Requires transmission removal to access (8-10 hours) or drop subframe for seal replacement. Many techs just top off fluid until it becomes catastrophic. Full replacement of transfer case if bearings damaged from running dry.
Estimated cost: $600-1,200
EVAP Fuel Tank Pressure Sensor Failure
Common · low severityTypical onset: 80,000-150,000 mi
Symptoms: Check engine light with P0440, P0442, P0446 codes, Fuel smell near tank, Difficulty filling fuel tank (pump clicks off early), Hissing sound when opening fuel cap
Fix: Pressure sensor on top of fuel tank fails, and vent valves stick. Related to recall but many still have issues. Tank must be dropped (2-3 hours). Common to find rusted fuel tank straps and filler neck on rust-belt vehicles, adding cost.
Estimated cost: $350-650
Buy only if under $3,000 with recent transmission service and confirmed intake gaskets done; otherwise you're financing someone else's deferred maintenance on a platform with two inevitable expensive failures.
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.