NHTSA lists 1 safety recall and 175 owner complaints for the 2003 Chevrolet Suburban 1500. Most complaints involve electrical system (60) and service brakes (42). The EPA rates it 13–14 mpg combined.
CERTAIN FEDERAL-MOGUL REPLACEMENT WHEEL HUB ASSEMBLIES WITH THE BRAND NAMES: NATIONAL, CARQUEST P/NOS. 515020, 515021, 515025, 515053, 515054, 515059, AND 515060, SHIPPED BETWEEN JANUARY 23, 2006, AND DECEMBER 20, 2007, SOLD FOR LIGHT DUTY AND MEDIUM DUTY TRUCKS. THE INBOARD RETENTION NUT USED TO MAINTAIN HUB BEARING ASSEMBLY CAN LOOSEN RESULTING IN AN ABS LIGHT INDICATION, NOISE, AND/OR WHEEL SEPARATION.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“MY ENTIRE INSTRUMENT PANEL DOES NOT ALWAYS WORK WHEN I START MY TRUCK. IT WILL OCCASIONALLY COME TO LIFE AFTER DRIVING A BIT OR SOMETIMES IT DOESN'T WORK AT ALL. NO PATTERN AS TO WHEN, WHERE OR DRIVING CONDITIONS. STARTED A FEW MONTHS AGO WHERE IT WOULD ALWAYS WORK SHORTLY AFTER I STARTED THE ENGINE AND HAS PROGRESSIVELY GOTTEN WORSE,”
“BRAKE LINES RUSTING. TWICE IN A MONTH THE BRAKES FAILED AFTER A HARD STOP AT A TRAFFIC LIGHT. LUCKY FOR ME & OTHERS THERE WERE NO CARS IN FRONT OF ME OR TRYING TO CROSS THE INTERSECTION. AFTER APPLYING THE BRAKE HARD TO STOP, THE BRAKE PEDAL CONTINUED ALL THE WAY TO THE FLOOR AND THE CAR DID NOT STOP. THE MECHANIC TOLD ME THAT THE BRAKE LINES RUSTED AND THEREFORE THE BRAKE FLUID LEAKED OUT OF THE SYSTEM”
“THE BRAKES FAILED DUE TO RUSTED BRAKE LINES BLOWING OUT IN THE PROXIMITY OF THE ABS MOTOR, WHICH IS LOCATED ON THE DRIVER SIDE, ALONG THE FRAME, UNDERNEATH THE DRIVERS SEAT. *TR”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Suburban 1500 2WD Auto 4-spd, 8 cyl, 5.3 L, LM7 · Rear-Wheel Drive | 12 | 17 | 14 | $4,450 | 635 |
| Suburban 1500 2WD Auto 4-spd, 8 cyl, 5.3 L, FLEX-FUEL · Rear-Wheel Drive | 13 | 17 | 14 | $4,450 | 635 |
| Suburban 1500 4WD Auto 4-spd, 8 cyl, 5.3 L, FLEX-FUEL · 4-Wheel or All-Wheel Drive | 13 | 17 | 14 | $4,450 | 635 |
| Suburban 1500 AWD Auto 4-spd, 8 cyl, 5.3 L, FLEX-FUEL · 4-Wheel or All-Wheel Drive | 13 | 17 | 14 | $4,450 | 635 |
| Suburban 1500 4WD Auto 4-spd, 8 cyl, 5.3 L, LM7 · 4-Wheel or All-Wheel Drive | 12 | 16 | 13 | $4,800 | 684 |
| Suburban 1500 AWD Auto 4-spd, 8 cyl, 5.3 L, LM7 · 4-Wheel or All-Wheel Drive | 12 | 16 | 13 | $4,800 | 684 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
1 safety recall as of Nov 7, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 175 complaints with NHTSA. The most-cited components are electrical system (60), service brakes (42), service brakes, hydraulic (18). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2003 Chevrolet Suburban 1500 at 13–14 mpg combined, depending on engine and drivetrain (6 versions rated).