What are the most common Chevrolet Blazer problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2003 Chevrolet Blazer has 5 documented issues. The most frequently reported are: ABS False Activation at Low Speed from Wheel Speed Sensor Corrosion, 4.3L V6 Lower Intake Manifold Gasket Coolant Leak, In-Tank Fuel Pump Premature Failure and Stalling. Of these, 3 are rated critical and should be addressed promptly.
Is the Chevrolet Blazer reliable?
The 2003 Chevrolet Blazer has 5 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 3 issues are rated critical: ABS False Activation at Low Speed from Wheel Speed Sensor Corrosion and 4.3L V6 Lower Intake Manifold Gasket Coolant Leak and In-Tank Fuel Pump Premature Failure and Stalling. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Chevrolet Blazer problems?
Repair costs for known Chevrolet Blazer issues range from $80 to $1,100, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, ABS False Activation at Low Speed from Wheel Speed Sensor Corrosion, typically costs $120-$600 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 1995-2003 Chevrolet Blazer ABS False Activation at Low Speed from Wheel Speed Sensor Corrosion?
On 1995-2003 Blazer/S10 trucks, rust and debris build up on the front wheel speed sensor mounting surfaces, increasing the air gap between the sensor and the hub reluctor ring. The weakened signal makes the Kelsey-Hayes ABS falsely interpret a wheel as locking during light brakin… Repairs typically run $120-$600. Severity: high.
What is the 1996-2005 Chevrolet Blazer 4.3L V6 Lower Intake Manifold Gasket Coolant Leak?
The Vortec 4.3L V6 (like its 5.0L/5.7L siblings) used plastic-carrier lower intake manifold gaskets that erode and crack at the coolant ports from repeated thermal expansion cycles between the aluminum manifold and iron heads. Failures cluster between roughly 80,000 and 150,000 m… Repairs typically run $500-$1,100. Severity: high.
What is the 1995-2005 Chevrolet Blazer In-Tank Fuel Pump Premature Failure and Stalling?
Blazer in-tank fuel pumps fail well before normal service life — NHTSA complaints document failures from roughly 34,000 to 102,000 miles (averaging around 44,000 on the 2000 model year), often preceded by an erratic fuel gauge from the integrated sending unit corroding. GM produc… Repairs typically run $450-$900. Severity: high.
What is the 1992-2005 Chevrolet Blazer Electric-Shift Transfer Case Encoder Motor and TCCM Failure (Service 4WD Light)?
Push-button 4WD Blazers use an electric encoder motor on the NP1 electronic-shift transfer case, commanded by the Transfer Case Control Module (TCCM). The encoder motor's internal position sensor and gears wear out, and TCCM faults are equally common, so the transfer case fails t… Repairs typically run $250-$700. Severity: medium.
What is the 1983-2005 Chevrolet Blazer Door Hinge Pin and Bushing Wear Causing Sagging Doors?
The heavy doors on two-door S-10 Blazers ride on small hinge pins with soft brass bushings that wear out — accelerated by lack of lubrication — letting the bushing holes in the hinge plates wallow out egg-shaped. The door then drops when opened, no longer aligns with the striker,… Repairs typically run $80-$300. Severity: low.
