The 2006 TrailBlazer SS pairs a stout Corvette-derived LS2 6.0L V8 with the 4L70-E transmission in a truck platform never designed for 395 hp. When maintained, the engine is bulletproof, but transmission cooling, drivetrain mounts, and AFM-related failures define the ownership experience.
Transmission Oil Cooler Line Failure & Fluid Cross-Contamination
Common · high severity
Typical onset: 80,000-150,000 mi
Symptoms: Coolant in transmission fluid (strawberry milkshake appearance), Transmission slipping or harsh shifts, Engine overheating or coolant loss, Check engine light with transmission codes
Fix: Replace external transmission cooler lines and flush both cooling system and transmission. If contamination occurred, transmission rebuild required (12-16 hours labor). Many shops now bypass the in-radiator cooler entirely and install larger external unit.
Estimated cost: $800-1,200 for lines and flush; $2,500-4,000 if trans rebuild needed
4L70-E Transmission 3-4 Clutch Pack Failure
Common · high severity
Typical onset: 100,000-140,000 mi
Symptoms: Slipping or flare on 3-4 upshift, No fourth gear / stays in third, Burnt transmission fluid smell, P0894 or P0735 codes
Fix: 4L70-E was never adequately beefed up for LS2 torque. Requires transmission removal and rebuild with upgraded clutches and valve body modifications (14-18 hours labor). Preventive fluid changes at 50k intervals help but don't eliminate risk.
Estimated cost: $2,800-4,200
Active Fuel Management (AFM) Lifter and Valve Train Failure
Occasional · high severity
Typical onset: 90,000-130,000 mi
Symptoms: Ticking or tapping noise from engine, especially on cold start, Check engine light with P0300-series misfire codes, Rough idle or dead cylinder, Metal shavings in oil
Fix: AFM lifters collapse, often damaging camshaft lobes and valve springs. Requires heads-off repair: lifters, camshaft, valve springs, pushrods (20-28 hours labor). Many owners delete AFM system entirely during repair with aftermarket cam and lifter kit to prevent recurrence.
Estimated cost: $3,500-5,500 for OEM repair; $4,000-6,000 for AFM delete with performance cam
Transmission and Transfer Case Mount Failure
Common · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Clunking on acceleration or deceleration, Vibration at highway speeds, Visible drivetrain movement when rocking vehicle in park, Shifter slop or difficulty engaging gears
Fix: Rubber mounts deteriorate from LS2 torque and age. Transmission mount and transfer case mount both fail. Replace both simultaneously (2-3 hours labor). Polyurethane aftermarket mounts last longer but transmit more NVH.
Estimated cost: $400-700
Rear Differential Axle Seal and Pinion Seal Leaks
Common · low severity
Typical onset: 80,000-130,000 mi
Symptoms: Gear oil spots under rear of vehicle, Wet differential housing or axle tubes, Low differential fluid level, Whining noise from rear axle if fluid very low
Fix: GM 9.5" 14-bolt rear seals fail from age and wear. Axle seals require pulling axle shafts (1.5 hours each side); pinion seal requires driveshaft removal and pinion preload reset (2.5 hours). Address before fluid loss causes bearing damage.
Estimated cost: $350-600 for axle seals; $450-750 for pinion seal
Front Suspension Ball Joint Wear
Occasional · medium severity
Typical onset: 90,000-140,000 mi
Symptoms: Clunking over bumps, Wandering steering or poor alignment retention, Excessive tire wear on inside edges, Play in wheel when jacked up
Fix: Upper and lower ball joints wear in GMT360 platform. Uppers are replaceable separately (1.5 hours per side); lowers require entire control arm replacement (2 hours per side). Alignment required after. Do both sides together.
Estimated cost: $800-1,400 for all four corners with alignment
Fuel Pump and Filter Assembly Failure
Occasional · medium severity
Typical onset: 100,000-150,000 mi
Symptoms: Hard starting, especially when hot, Stumble or hesitation under acceleration, Stalling at idle or when coming to stop, Whining noise from fuel tank
Fix: In-tank pump assembly fails; GM filter sock clogs. Requires fuel tank drop (3-4 hours labor). LS2 fuel demands are high; use AC Delco or equivalent OEM-quality replacement. Some owners add aftermarket in-line filter for insurance.
Estimated cost: $600-950
Owner tips
Change transmission fluid every 50,000 miles with full-synthetic Dexron VI — the 4L70-E is the weak link behind the LS2
Delete AFM system preemptively if you keep the truck past 100k; install catch can to reduce carbon buildup from PCV system
Bypass the in-radiator transmission cooler and install dedicated external cooler — cheap insurance against the milkshake failure
Use 5W-30 or 0W-40 full synthetic oil changed at 5,000-mile intervals; LS2 has tight piston-to-wall clearances
Budget for drivetrain mounts at 80k — polyurethane upgrades handle torque better but increase vibration
Buy one only if transmission has been rebuilt or you budget $3-4k for inevitable trans work; the LS2 is fantastic but the 4L70-E and AFM system are ticking time bombs that define the ownership cost curve.
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.
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Fitment notes: Side post terminals; higher CCA recommended for 6.0L LS2 V8 engine
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Control Modules — 2006 Chevrolet TrailBlazer SS
Every control module on the 2006-2007 Chevrolet TrailBlazer SS — 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.
⚠️ Passlock III system; key relearn required if BCM replaced; 10-minute relearn for new keys
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.
Maintenance Schedule — 2006 Chevrolet TrailBlazer SS
VISIBILITY:POWER WINDOW DEVICES AND CONTROLS · 15V599000
2015-09-24
General Motors LLC (GM) is recalling certain model year 2006-2007 Buick Rainier, Chevrolet Trailblazer and GMC Envoy vehicles, and 2006 GMC Envoy XL and Chevrolet Trailblazer EXT vehicles. Fluid may enter into the driver's door master power window switch module, causing corrosion that could result in a short in the circuit board, causing window switches to become inoperative. Previously, the affected vehicles may have had their master power window switch module treated with a protective coating, instead of having it replaced.
Consequence: The protective coating may not eliminate the risk that the circuit board could short and result in a fire, even while the vehicle is unattended.
Remedy: GM will notify owners, and dealers will install a new driver's door switch module, free of charge. The recall began on November 2, 2015. Owners may contact Buick customer service at 1-800-521-7300, Chevrolet customer service at 1-800-222-1020, and GMC customer service at 1-800-462-8782. GM's number for this recall is 15700.
EXTERIOR LIGHTING:HEADLIGHTS · 15V519000
2015-08-14
General Motors LLC (GM) is recalling certain model year 2007 Pontiac Grand Prix, 2006-2009 Buick LaCrosse, 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, 2006 Chevrolet Trailblazer EXT, GMC Envoy XL, 2006-2008 Isuzu Ascender, and Saab 9-7x vehicles. In the affected vehicles, the headlamp driver module (HDM) may overheat and fail, causing the headlamps and daytime running lights to not illuminate.
Consequence: Headlamps that do not illuminate reduce the driver's ability to see the roadway and reduce the vehicle's visibility to oncoming vehicles, both of which increase the risk of a vehicle crash.
Remedy: GM will notify owners, and dealers will replace the HDM, free of charge. The recall began on May 17, 2016. Owners may contact Buick customer service at 1-800-521-7300 or Pontiac customer service at 1-800-762-2737. GM's number for this recall is 14291.
VISIBILITY:POWER WINDOW DEVICES AND CONTROLS · 14V404000
2014-07-02
General Motors LLC (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door master power window switch module, causing corrosion that could result in a short in the circuit board. A short may cause the power door lock and power window switches to function intermittently or become inoperative. The short may also cause overheating, which could melt components of the door module, producing odor, smoke, or a fire.
Consequence: A short in the circuit board could lead to a fire, increasing the risk of personal injury. A fire could occur even while the vehicle is not in use. As a precaution, owners are advised to park outside until the remedy has been made.
Remedy: GM will notify owners, and dealers will inspect the part number on the door module, and install a new door module if necessary, free of charge. Parts for the remedy are not currently available. An interim letter was mailed to owners in August 2014. A second owner letter will be mailed when parts are available. Owners may contact GM customer service at 1-800-521-7300 (Buick), 1-800-222-1020 (Chevrolet), 1-800-462-8782 (GMC), 1-800-955-9007 (SAAB), and 1-800-255-6727 (Isuzu). GM's number for this recall is 14309. NOTE: This recall provides a new remedy for all vehicles covered by recall 13V-248. Vehicles whose modules were modified but not replaced as part of the previous recall remedy must have their vehicles remedied again under this campaign.
ELECTRICAL SYSTEM · 13V248000
2013-06-13 · EA12004
General Motors (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door module, causing corrosion that could result in a short in the circuit board. A short may cause the power door lock and power window switches to function intermittently or become inoperative. The short may also cause overheating, which could melt components of the door module, producing odor, smoke, or a fire.
Consequence: A short in the circuit board could lead to a fire, increasing the risk of personal injury. A fire could occur even while the vehicle is not in use. As a precaution, owners are advised to park outside until the remedy has been made.
Remedy: Owners will be contacted and dealers will test the driver's door module. If the module is functioning properly, a protective coating will be applied. If the module is not functioning properly, it will be replaced. These repairs will be done free of charge. GM will notify Buick, Chevrolet, and GMC owners, Isuzu and Saab will contact their respective owners. The recall began on August 2, 2013. Buick owners may contact the owner center at 1-800-521-7300, Chevrolet owners at 1-866-694-6546, GMC owners at 1-866-996-9463, Isuzu owners at 1-800-255-6727, and Saab owners at 1-800-955-9007. GM's campaign number is 12180. This recall is an expansion of recall 12V-406.
ELECTRICAL SYSTEM · 12V406000
2012-08-16 · EA12004
General Motors (GM) is recalling certain model year 2006 Chevrolet Trailblazer EXT and GMC Envoy XL and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, SAAB 9-7x, and Isuzu Ascender vehicles, originally sold or currently registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin, and the District of Columbia. Fluid may enter the driver's door module, causing corrosion that could result in a short in the circuit board. A short may cause the power door lock and power window switches to function intermittently or become inoperative. The short may also cause overheating, which could melt components of the door module, producing odor, smoke, or a fire.
Consequence: A short in the circuit board could lead to a fire, increasing the risk of personal injury. A fire could occur even while the vehicle is not in use. As a precaution, owners are advised to park outside until the remedy has been made.
Remedy: Parts for this recall are expected to available in March 2013. GM will notify Buick, Chevrolet, and GMC owners when parts are available. Buick owners may contact the owner center at 1-800-521-7300, Chevrolet owners at 1-866-694-6546, and GMC owners at 1-866-996-9463. Isuzu owners will be notified by Isuzu Motors when parts are available. Owners may contact Isuzu customer service at 1-800-255-6727. SAAB owners will be notified by SAAB Cars North America when parts are available and for inquiries, owners may call SAAB customer service at 1-800-955-9007.
AIR BAGS:FRONTAL · 06V417000
2006-10-31
CERTAIN VEHICLES ORIGINALLY BUILT WITH CLOTH SEATS THAT WERE EQUIPPED WITH AN AUTOMATIC AIR BAG PASSENGER SENSING SYSTEM AND LATER REUPHOLSTERED WITH AFTERMARKET LEATHER SEAT COVER KITS ARE INVOLVED. TESTING HAS INDICATED THAT THE AFTERMARKET LEATHER SEAT COVERS CAN CAUSE THE PASSENGER SENSING SYSTEM TO MALFUNCTION.
Consequence: IF THE PASSENGER SENSING SYSTEM MALFUNCTIONS, THE FRONT AIR BAG ON THE PASSENGER SIDE MAY BE DISABLED WHEN IT SHOULD BE ENABLED, OR ENABLED WHEN IT SHOULD BE DISABLED. IN EITHER CASE, IN THE EVENT OF A CRASH THAT REQUIRES AIR BAG DEPLOYMENT, A FRONT PASSENGER'S LEVEL OF INJURY MAY BE INCREASED.
Remedy: BECAUSE A REPLACEMENT LEATHER SEAT COVER THAT IS COMPATIBLE WITH THE PASSENGER SENSING SYSTEM IS NOT AVAILABLE, GENERAL MOTORS (GM) WILL REPURCHASE THESE VEHICLES IN ACCORDANCE WITH THE TERMS STATED IN GM'S LETTER TO OWNERS. THE RECALL BEGAN ON NOVEMBER 6, 2006. OWNERS SHOULD CONTACT GM AT 1-877-477-1022 TO BEGIN THE PROCESS OF REPURCHASING THEIR VEHICLE.
EQUIPMENT:OTHER:LABELS · 05V552000
2005-12-07
CERTAIN TRUCKS AND SPORT UTILITY VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES WERE SHIPPED WITH TIRE AND LOADING INFORMATION LABELS LISTING AN INACCCURATE VEHICLE CAPACITY WEIGHT.
Consequence: A MISPRINTED LABEL COULD LEAD TO IMPROPER VEHICLE LOADING SPECIFICATIONS OR TIRE INFLATION WHICH COULD RESULT IN A TIRE FAILURE, INCREASING THE RISK OF A CRASH.
Remedy: OWNERS WILL BE PROVIDED WITH CORRECTED LABELS AND INSTALLATION INSTRUCTIONS. AT THE CUSTOMER'S OPTION, A DEALER CAN INSTALL THE LABEL FOR THEM. THE RECALL BEGAN ON MARCH 31, 2006. OWNERS MAY CONTACT BUICK AT 1-866-608-8080, CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, HUMMER AT 1-800-732-5493, PONTIAC AT 1-800-620-7668, SATURN AT 1-800-972-8876, OR ISUZU AT 1-800-255-6727.
STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS · 05V455000
2005-10-05
CERTAIN PASSENGER VEHICLES MAY HAVE BEEN BUILT WITH A POWER STEERING HOSE THAT IS NOT TO SPECIFICATION. UNDER EXTREME STEERING MANEUVERS, SUCH AS TURNING THE STEERING WHEEL FULLY TO THE LEFT OR RIGHT WHILE BRAKING, THE HOSE MAY FRACTURE AND LEAK FLUID.
Consequence: IF THIS WERE TO OCCUR, POWER STEERING ASSIST WOULD BE LOST AND INCREASED STEERING EFFORT WOULD BE REQUIRED. ON VEHICLES EQUIPPED WITH HYDRO-BOOST POWER BRAKES, IT COULD ALSO RESULT IN LOSS OF POWER BRAKE ASSIST AND INCREASED BRAKING EFFORT WOULD BE REQUIRED. IF THE POWER STEERING FLUID SPRAY WERE TO SPRAY ONTO HOT ENGINE PARTS, AN ENGINE COMPARTMENT FIRE COULD OCCUR.
Remedy: DEALERS WILL INSPECT THE POWER STEERING HOSE(S) FOR TWO SUSPECT DATE CODES AND REPLACE THEM IF REQUIRED. THE RECALL WILL BEGIN ON OCTOBER 14, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, BUICK AT 1-866-608-8080, CADILLAC AT 1-866-982-2339, ISUZU AT 1-800-255-6727, OR HUMMER AT 1-800-732-5493.
Vehicle Info — 2006 Chevrolet TrailBlazer SS
Performance
Horsepower
395hp
Torque
400lb-ft
0–60 mph
5.7sec
Quarter mile
14.2sec
Top speed
130mph
Capability & size
Towing capacity
6,200lb
Payload
1,185lb
Curb weight
4,790lb
Wiper blades
Performance variant of GMT360 TrailBlazer. Same wiper specs as standard model.
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 2006 Chevrolet TrailBlazer SS 6.0L V8 LS2 and can vary by trim.
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years.