1993 Chevrolet S10 Problems

What owners report

Owners of this model year report braking problems far more than anything else: the ABS brakes on many trucks go to the floor, grab or lock, and stretch out stopping distance, and several complaints mention the ABS recall campaign. Other recurring reports are fuel entering the engine oil or leaking from the tank area, coolant leaking from the heater core into the cabin, and the exhaust gas recirculation valve sticking. Brake complaints arrive at moderate mileage, roughly 70,000 to 130,000 miles.

1. 1
   Brakes

   ABS brake pedal goes to the floor / long stopping distance

   • 135 complaints (58%)
   • median 96,000 mi at 11.2 yrs old (2 state mileage, few)
   • 28 mention a crash, fire or injury
   • filed 1995–2004

   Complaints describe the brake pedal sinking all the way down when the ABS system is engaged, with the truck taking much longer to stop than expected; some report that pumping the pedal restores braking. Others describe the ABS locking the wheels, grabbing, or causing a skid on wet pavement, and a few say the truck pulls to one side under ABS braking. Several owners took the truck to the dealer and were told the ABS module, relay pump, or motor needed replacement, or that no fault could be found; one owner reported the problem persisted after the recall repairs were completed. Often described under normal driving conditions at low to moderate speeds, with some reports on wet pavement and a few in the first stop of the day.

   Recall 99V193000

   What to check: Ask about the ABS recall work (99V193000) and whether the ABS module or motor relay pump has been replaced, then test the brakes on a wet road at low speed. A pedal that sinks toward the floor is worth having inspected before purchase.

   2 excerpts from owner complaints in NHTSA records

   “Vehicle was taken to the dealer for recall 00v193000 repairs concerning ABS. Dealer made the repairs, but the vehicle still slipped when the brakes were applied forcefully. Consumer had the module kit replaced along with a new vac switch, wiring harness, and transfer switch. Brakes continued to slip when pressure was applied.”

   NHTSA complaint #10034332, filed 2003-09, 120,000 miles

   “While driving at a speed of 35-55 MPH and trying to apply brakes vehicle would stop. Consumer applied brakes, and stepped on pedal which went all the way to the floor.dealer was contacted, and agreed to fix vehicle at owners expense. Also dealer stated that there was no recall.”

   NHTSA complaint #845294, filed 1999-08
2. 2
   Fuel system

   Fuel entering engine oil / fuel leaks at tank and injector

   • 16 complaints (7%)
   • median 165,000 mi at 10.9 yrs old (4 state mileage, few)
   • filed 1996–2015

   Owners describe gasoline reaching the engine oil after a fuel injector assembly failure, and in one case fuel spraying under the intake plenum. Several complaints describe the fuel tank rusting through where a plastic shield or cover traps water, producing a leak, along with reports of a failed fuel pump, a melted fuel pump wiring harness, fuel escaping from the filler neck, and an intake manifold gasket failure that let coolant into the oil. Mileage varies widely, from around 130,000 miles upward on the sample reports, and several of the tank rust reports describe older trucks that had never been off-road.

   What to check: Check the oil for a fuel smell and watch the oil level between changes, and inspect the top of the fuel tank and its shield for rust or trapped debris. Ask whether the fuel pump and sending unit have been replaced.

   2 excerpts from owner complaints in NHTSA records

   “Central multiport fuel injector assembly failed, causing fuel to enter the oil pan and damage the motor. Fuel was spraying under the phlenem and could have caused a fire. Same unit has failed just over 15 months later, again spraying gas under the phlenem, thankfully again no fire,just spraying of gas.”

   NHTSA complaint #10023602, filed 2003-06, 131,300 miles

   “The plastic stone shield allowed water to remain in contact with the front lower edge of the fuel tank. This caused the tank to rust through and leak. The plastic shield contained the leak, concentrating the leaked fuel before spilling it out onto the ground. This was an original tank, the truck has never been off-road, nor in an accidnet. The poor design of the shiled/tank assembly allowed trapped water to cause a potentially dangerous condition to exist.”

   NHTSA complaint #714702, filed 1999-11
3. 3
   Visibility (wipers, defrost, mirrors)

   Coolant from heater core blows through defroster vents

   Mentioned in 4 of 60 sampled complaints

   Complaints describe a leaking heater core sending coolant out through the defroster vents and into the cabin, in some cases spraying the driver and passenger, and leaving coolant pooling on the floor. Owners report repeat failures and mention the dealer being notified. The few reports that mention mileage describe failures well under 50,000 miles; most sample complaints do not state mileage.

   What to check: Look for coolant residue or a sweet smell around the vents and floor mats, and ask whether the heater core has been replaced. Check that the defroster blows dry air.

   2 excerpts from owner complaints in NHTSA records

   “I have had the heater core fail twice 21, 000 miles and 44,000 miles. All other vehicles I have owned have had in excess of 100,000 miles and never had heater core fail.”

   NHTSA complaint #739121, filed 2001-01

   “Heater core blows antifreeze solution throught the defroster vents, and spray the driver and passenger in the face, eyes, and pool on the floor of the vehicle.”

   NHTSA complaint #524614, filed 1997-11

Buying note. The braking system deserves the most attention on this model year: confirm the ABS recall work was done and test the brakes, including on a wet surface. Also check the oil for a fuel smell and inspect the fuel tank area and heater core for leaks before deciding.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.