The 1991 Chevrolet C/K Pickup has no open NHTSA recalls. Owners report 8 recurring issue clusters, led by “Brake pedal to floor or loss of braking.” Chevrolet vehicles use the GM Oil Life System (OLS) — a percentage-based monitor that calculates oil life from driving conditions, not fixed mileage. When the OLS drops to 0%, oil and filter are due. The schedule below reflects GM's Normal Use intervals for everything else.
No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.
What drivers and federal regulators have officially reported about the 1991 Chevrolet C/K Pickup.
SERVICE BRAKES, HYDRAULIC
8 NHTSA complaints · 1996-05 → 2015-01
“PROPORTIONAL VALVE FAILED, CAUSING BRAKE PEDAL TO GO TO FLOOR”
“MASTER CYLINDER FAILED, CAUSING VEHICLE TO CONTINUE TO GO FORWARD WHEN BRAKES WERE ENGAGED”
“INTERMITTENTLY WHEN THE BRAKES ARE APPLIED THEY GO PARTIALLY TO THE FLOOR, RESULTING IN EXTENDED STOPPING DISTANCE”
TIRES
8 NHTSA complaints · 1998-05 → 2016-09
“DRIVING AT 50MPH FRONT LEFT TIRE SEPARATED LUCKILY I WAS ABLE TO CONTROL VEHICLE”
“WHILE DRIVING AT 55 MPH REAR LEFT TIRE BLEW OUT. 500 MILES LATER THE LEFT REAR TIRE BLEW OUT”
“CONSUMER WAS TRAVELING ABOUT 35MPH ON SIDE STREET AND FELT STEERING WHEEL VIBRATING BACK AND FORTH”
SEAT BELTS
9 NHTSA complaints · 1995-02 → 1999-09
“SEAT BELT LATCH MECHANISM FAILED, WILL NOT LATCH”
“PLASTIC TOGGLE INSIDE OF THE SEAT BELT BUCKLE BREAKS CAUSING FASTENER FAILURE”
“RESTRAINT RETRACTOR LOCKS IN POSITION AND WILL NOT EXTEND OR RETRACT WITHOUT CONSIDERABLE MANIPULATION”
VISIBILITY
6 NHTSA complaints · 1999-02 → 2007-10
“WINDSHIELD WIPERS WILL TURN ON AND OFF INTERMITTENTLY OR BE TOTALLY INOPERATIVE, WILL NOT START, CAUSING LOSS OF VISIBILITY”
“WINDSHIELD WIPERS WOULD QUIT WORKING AFTER BEING IN USE FOR A WHILE”
“WIPER MOTOR DOES NOT WORK WHEN EXPOSED TO CONDENSATION, I.E., WORKS WHEN DRY BUT DOESN'T WORK WHEN RAINING”
STEERING
3 NHTSA complaints · 1995-10 → 1997-04
“WHILE DRIVING, BOLTS BACKED OUT OF TILT STEERING COLUMN, STEERING WHEEL JAMMED/LOCKED UP, NO WARNING, NEAR CAUSING ACCIDENT”
“STEERING COLUMN WAS LOOSE, THEN WHILE DRIVING STEERING WHEEL BROKE OFF”
POWER TRAIN
5 NHTSA complaints · 1995-05 → 1997-11
“AUTOMATIC TRANSMISSION FAILURE, REPLACED THREE TIMES”
“TWO NEW TRANSMISSIONS FAILED”
“REVERSE WENT OUT AND WILL NOT SHIFT INTO SECOND GEAR”
STRUCTURE
3 NHTSA complaints · 1996-10 → 2014-03
“WHILE POWER WASHING THE FRAME NOTICED CRACKS ON BOTH SIDES OF FRAME”
“THE CONTACT STATED THAT UPON INSPECTION, IT WAS FOUND THAT THE FRAME WAS PERFORATED DUE TO RUST”
SERVICE BRAKES, HYDRAULIC
14 NHTSA complaints · 1995-01 → 1999-11
“ABS BRAKES LOCKED UP, FAIL TO STOP VEHICLE WHEN APPLIED 40-45MPH”
“ABS, BRAKE FAILURE, REAR BRAKES LOCKED UP WHEN APPLIED, VEHICLE WILL SLIDE”
“ANTI LOCK BRAKES EXPERIENCE EXTENDED STOPPING DISTANCE CONSTANTLY”
Issues on other model years
Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.
We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.
Critical for safety and preventing major damage
Change oil when the Oil Life System reaches 0% or every 12 months — whichever comes first. dexos1-approved synthetic oil required on all gas engines since 2011.
Estimated cost — typical U.S. ranges
Dealer
~$120–$160
Shop
~$85–$115
DIY
~$25–$55
Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.
Rotate tires every 7,500 miles. Silverado 4x4 and Tahoe owners benefit from earlier rotations to even out drivetrain wear.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Often free at the shop where you bought the tires — worth asking before paying.
Inspect brake pads, rotors, and parking brake at each tire rotation. Equinox and Malibu front pads typically last 40,000-50,000 miles.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.
GM specifies brake fluid replacement based on contamination testing. Test every 30,000 miles; replace if moisture content exceeds 3% or fluid appears dark.
Estimated cost — typical U.S. ranges
Dealer
~$180–$200
Shop
~$125–$140
DIY
~$10–$25
DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.
Keeps your vehicle running smoothly and efficiently
GM long-life cellulose air filters are rated 45,000 miles. Direct-injection engines are sensitive to airflow restriction; inspect at every oil change.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
5-minute job on most cars; the airbox lid usually has clips, no tools needed.
Severe service (heavy towing, frequent stop-and-go, dusty conditions): replace every 45,000 miles. Normal service: 97,500 miles. Use Dexron-VI on 6L80/8L90 transmissions.
Estimated cost — typical U.S. ranges
Dealer
~$330–$500
Shop
~$235–$355
DIY
~$60–$180
Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.
On 4WD models, replace transfer case fluid every 45,000 miles — sooner if towing or off-roading. Use GM Auto-Trak II fluid.
Estimated cost — typical U.S. ranges
Dealer
~$105–$140
Shop
~$75–$100
DIY
~$15–$40
AWD/4WD vehicles only. Easy drain-and-fill on most platforms.
GM iridium spark plugs are rated 100,000 miles on most LS and LT engines. The 5.3L V8 in Silverado 1500 commonly fouls plugs early under heavy idling.
Estimated cost — typical U.S. ranges
Dealer
~$285–$390
Shop
~$200–$275
DIY
~$25–$100
Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.
GM Dex-Cool (orange): first change at 150,000 miles or 5 years, then every 50,000 miles. Mixing with green coolant creates a sludge that destroys the cooling system.
Estimated cost — typical U.S. ranges
Dealer
~$285–$330
Shop
~$200–$235
DIY
~$25–$60
Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.
Silverado and Tahoe: replace rear axle fluid every 50,000 miles, or 25,000 miles if towing. Limited-slip differentials require GM friction-modifier additive.
Estimated cost — typical U.S. ranges
Dealer
~$150–$195
Shop
~$105–$135
DIY
~$20–$50
Drain plug + fill plug — straightforward DIY. AWD vehicles have two; budget for both.
Extends the life of your vehicle and improves comfort
Replace the cabin air filter every 22,500 miles. Silverado and Tahoe owners in dusty climates should replace earlier.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.
Occupant deaths in fatal crashes (FARS)
1,071 crashes 1990–2024
How the 1,071 occupant deaths break down
801
driver deaths
266
passenger deaths
4
not recorded by seat
1,071
occupant deaths
Crash years covered: 1990–2024 This model year first appears in 1991 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.
FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number
FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.
Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.
Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.
IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.
Owner-reported problem signals
Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.
6
complaints mentioning a crash
5
complaints mentioning a fire
Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.
How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.
This maintenance schedule for the 1991 Chevrolet C/K Pickup reflects Chevrolet's published service intervals and the Oil Life System system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.