1995 Chevrolet Blazer Problems: 9 Known Issues

On the 1995-2003 Chevrolet Blazer, 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 braking below about 5-10 mph, so the ABS buzzes, the pedal pushes back, and the truck lunges forward with extended stopping distance — without setting any trouble codes or lighting the ABS lamp. GM documented the condition in TSB 02-05-25-006B, and the identical corrosion mechanism triggered NHTSA recall 05V379000 covering about 1.35 million 1999-2002 GM full-size trucks and SUVs in salt-belt states.

On the 1995-1999 Chevrolet Blazer 4.3L Vortec V6, the S-series Blazer's Kelsey-Hayes ABS system is prone to age-related faults: front wheel-speed sensors (integrated into the hub bearings) corrode and give erratic signals, the EBCM ground at the radiator support gets rusty/loose, and later Kelsey-Hayes 325 modules can fail internally. Symptoms include an ABS warning light, erratic wheel-speed codes, and in some cases the ABS pump running with the key off. Corroded grounds and connectors are a very common root cause on rust-belt trucks.

On the 1992-2002 Chevrolet Blazer, the 4.3L Vortec V6 used a Central Port Injection system (CPI 1992-1995, CSFI 1996-2002) with a central injector body and six plastic poppet lines — the "spider" — mounted inside the intake manifold. The plastic lines and nut-kit connections crack and leak raw fuel into the plenum, while deposit buildup sticks the poppet valves open or closed, mis-fueling individual cylinders. The result is hard hot starts, persistent misfires, fuel-pressure leak-down, and a rich/fuel-smell condition; GM addressed sticking poppets in TSB 00-06-04-003B by back-servicing the CSFI unit with a redesigned MFI assembly.

On the 1995-1999 Chevrolet Blazer 4.3L Vortec V6, the factory front lower ball joints on the S-series Blazer were sealed with no grease fittings and cannot be lubricated, leading to premature wear. NHTSA complaints document serious failures where the ball joint separates, the wheel folds under the vehicle, and steering control is lost - sometimes at low speed. 4WD models carry more front-end weight and are especially prone. This is a safety-critical wear item on high-mileage examples.

On the 1992-2005 Chevrolet Blazer, 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 to shift into or out of 4WD or gets stuck in a mode. Owners see flashing shift buttons or a Service 4WD light, and the system stores encoder fault codes readable via the TCCM's flash sequence.

On the 1995-1999 Chevrolet Blazer 4.3L Vortec V6, 4WD Blazers with the electric push-button New Process 233 transfer case (RPO NP8) use a TCCM-controlled encoder motor to shift ranges. The encoder motor, its position sensor, corroded selector-button contacts, and connector moisture are all common failure points, producing a "Service 4WD" warning, refusal to engage 4-Hi/4-Lo, or the case getting stuck in neutral. A frequent aggravating factor is corrosion at the button module and connectors.

On the 1983-1997 Chevrolet Blazer, s-series 4x4s use a front axle disconnect operated by a vacuum-diaphragm actuator (or the notoriously slow thermal linear actuator on early-90s trucks) to couple the front axle after the transfer case shifts. The actuator diaphragm cracks and the small vacuum lines and switch atop the transfer case leak, so the transfer case engages but the front wheels never pull — engagement is also progressively slower in cold weather as the thermal actuator ages. This is one of the most common 4WD complaints on these trucks, documented across years of forum threads and an entire aftermarket fix category.

On the 1995-1999 Chevrolet Blazer 4.3L Vortec V6, the GM truck/SUV instrument clusters of this era use small air-core stepper motors to drive each gauge needle. Over time the internal dampening grease dries and the motors fail, causing needles to stick, read wildly wrong, or drop to zero. The speedometer and tachometer ("S" type motors on 1995-1999 clusters) are the most commonly affected, though the fuel gauge is also frequently impacted. It is a wear/age failure, not a sending-unit fault, so replacing senders does not fix it.

On the 1983-2005 Chevrolet Blazer, 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, and must be lifted or slammed to close. It is so universal on these trucks that multiple aftermarket oversized pin-and-bushing kits exist specifically for the platform.