1994 OLDSMOBILE BRAVADA

Typical onset: 100,000-150,000 mi

Symptoms: Slipping between 2nd and 3rd gear, especially under load, Harsh or delayed shifts when cold, No reverse or intermittent reverse engagement, Burnt transmission fluid smell and dark, debris-filled fluid

Fix: The 4L60-E in these trucks has weak 3-4 clutch packs and sun shell failures. Rebuild runs 12-16 hours including R&R, converter replacement, and updated hard parts. Many shops won't touch a band-aid repair—it's rebuild or replace. Aftermarket reman units with upgrades are common.

Estimated cost: $2,200-3,500

Typical onset: 80,000-130,000 mi

Symptoms: Coolant loss with no visible external leaks, White smoke from exhaust on startup, Rough idle and misfire codes, especially when warm, Milky oil or overfilled crankcase from coolant intrusion

Fix: The composite plastic intake gasket disintegrates and allows coolant into the crankcase or cylinders. Requires upper intake removal, gasket set replacement, and often new injector seals. 4-6 hours labor. Use Fel-Pro or OEM metal-core gaskets, never the cheap composite re-runs.

Estimated cost: $650-1,100

Typical onset: 90,000-140,000 mi

Symptoms: No-start or extended cranking, especially when hot, Stalling at idle or under acceleration, Fuel gauge reading empty or erratic despite full tank, Whining noise from rear of vehicle

Fix: The in-tank pump fails frequently, often taking the sending unit with it. Requires fuel tank drop—about 3-4 hours including draining fuel. AC Delco or Delphi units are reliable; avoid ultra-cheap aftermarket. Inspect fuel lines and filler neck for rust while tank is down.

Estimated cost: $550-950

Typical onset: 70,000-120,000 mi

Symptoms: SERVICE 4WD light illuminated on dash, Won't shift into or out of 4WD modes, Grinding or clicking from transfer case area when selecting modes, Stuck in one drive mode (usually 2WD or AWD)

Fix: The electronic shift motor on the NVG 149 transfer case corrodes internally or the mode switch contacts fail. Motor replacement is 2-3 hours, switch is easier at 1-1.5 hours. Diagnose with a Tech 1 scanner before throwing parts—sometimes it's just a connector issue. OEM Delco encoder motors last; aftermarket is hit-or-miss.

Estimated cost: $400-750

Typical onset: 150,000-200,000 mi

Symptoms: Excessive oil consumption (1 qt per 500-1,000 miles), Blue smoke on startup or acceleration, Knocking or ticking noise from lower engine, worse when cold, Low oil pressure at idle when hot

Fix: The 4.3L Vortec isn't known for early failure, but neglected oil changes and the intake gasket coolant intrusion accelerate ring and bearing wear. Rings-only job is 14-18 hours; if bearings are scored, you're looking at a full rebuild or short block swap at 25-35 hours. Most shops recommend a reman long block at this point.

Estimated cost: $3,500-6,500

Typical onset: 60,000-100,000 mi

Symptoms: Clunking or popping when turning, especially tight turns, Grease splatter on inside of front wheels, Vibration or shudder during acceleration in turns, Whining or grinding from front differential

Fix: The CV boots tear easily from road debris, then water and dirt destroy the joints. Axle replacement is straightforward at 2-3 hours per side. If ignored, debris enters the front diff and ruins the gears—that's a 6-8 hour diff rebuild. Inspect boots every oil change and replace at first sign of splitting.

Estimated cost: $350-650 per axle; $1,200-1,800 for differential

Typical onset: 100,000-150,000 mi

Symptoms: Hard starting, especially after sitting overnight, Strong fuel smell from engine bay or in cabin, Loss of fuel pressure after shutdown (long crank to restart), Rough idle and hesitation, black smoke under load

Fix: The Central Port Injection spider assembly sits under the intake plenum and develops leaks at the poppet nozzles or fuel lines. Requires upper intake removal and complete spider replacement with updated CSFI unit. 5-7 hours labor. Do NOT attempt to repair individual lines—replace the entire assembly.

Estimated cost: $750-1,200