Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 Chevrolet Tahoe owners, lightly cleaned up (personal details are redacted by NHTSA).
On November 5, 2015, I took my 2003 Tahoe in due to the fact that an exhaust manifold bolt had sheared off during the normal course of driving. I bought my Tahoe new and have always had it service at the mccarthy-morris Chevrolet dealership on overland park, ks. I realize that over time parts on a vehicle will break and at 118,000 miles I should expect to incur maintenance expenses. However, based on my research GM used a substandard bolt and this issue impacts millions of GM v8 motors. From a safety perspective, I had the repair done because I didn't want to risk having exhaust fumes entering the cab of my vehicle. My understanding is that this type of exhaust leak could have epa implications as well. In order to have the repair done, the dealership had to pull the head because one of the two bolts that sheared off was flush with the head and had to be drilled out. …
I am one of millions of 1999-2007 Chevrolet v8 truck engine owners, who is told by their GM mechanic that the exhaust manifold bolt(s) has broken, leading to expenses ranging from $500 to $1,500. GM built the engines with substandard bolts that do not last in comparison to the rest of the engine and vehicle. One or more will break, which causes an exhaust leak and check engine light, and therefore the vehicle is out of service as it cannot pass state emissions tests. Additionally, some of the exhaust leaks are near other sensors which can cause faulty readings or unsafe conditions. Those who attempt to self-fix this GM-caused problem face unsafe conditions, as they are difficult to get to, require a welder to fix, May damage surrounding equipment, etc. …
I brought in my 2003 Chevrolet Tahoe to cutter Chevrolet in honolulu, hawaii to report an "engine light on" concern. Service advisor julianna parks reported that the issue May be attribute to (2) broken exhaust bolts on my vehicle's 5.3 liter mfi iron v8 engine. Cutter Chevrolet is at 711 ala moana boulevard, honolulu, hi 96813. In following up today October 18, 2017, shop manager brad eisen reported that these bolts breaking is not a common problem, and that there is no recall for such issues. Cutter Chevrolet has had my vehicle since October 01, 2017 and reported that in addition to my $500+ inspection costs, that my costs for repair thus far has exceeded $1,400.00 in their attempts to repair these broken bolts, and that they expect the final cost to be much higher by the time they are done as they have to contract a specialist mechanic from another town to come into the cutter …
Tl* the contact owns a 2003 Chevrolet Tahoe. While approaching a stop, the vehicle began to vibrate severely and the check engine warning light illuminated. In addition, the vehicle failed to accelerate when the accelerator pedal was depressed. The failure recurred intermittently. The vehicle was taken to an independent mechanic where it was diagnosed that the throttle position sensor failed and needed to be replaced. The vehicle was repaired, but the failure recurred. The vehicle was also taken to the dealer where it was diagnosed that the wiring harness failed and needed to be repaired. The vehicle was not repaired. The manufacturer was not notified of the failures. The approximate failure mileage was 166,000.
Tl* the contact owns a 2003 Chevrolet Tahoe. While driving at 45 MPH, the vehicle stalled. The contact was able to restart the vehicle. The vehicle was taken to an independent mechanic who diagnosed that the idle control needed to be reset. The vehicle was not repaired. The failure recurred on numerous occasions. The manufacturer was not notified of the failure. The failure mileage was 208,000.
Ever since purchasing my Chevrolet Tahoe lt brand-new in August of 2003, the muffler and/or the exhaust system has made an exploding sound both while the vehicle is running and after it is shut off. At stoplights and after being parked, you both hear and feel explosions from under the truck. GM contends the sound is steam building up in the muffler and exploding, but admits it is not a "normal" backfire, and states that some tahoes do it, and some do not. They have released two separate fixes for the problem but neither has been effective, and the last one came out over a year ago. Official GM policy prohibits replacing any mufflers/exhaust systems on vehicles exhibiting this problem - owners are simply told the explosions are normal. After much discussion, GM replaced my muffler, and the second one does the same thing. …
Yesterday was driving home from work and came to a round about, slowed down and vehicle died (alternator gauge went below 14, oil pressure dropped below 40, and battery light came on). I lost all steering and brake pedal was stiff. Now vehicle continuously idles rough and will stall out if not on the throttle, idles 500 and lower. I have replaced mass air flow sensor, air filter, plugs, wires, o2 sensors, fuel filter, EVAP canister, alternator, and had throttle body cleaned. See there are many complaints filed of the same issues and wondering if anyone at GM has found a solution. Also have noticed GM has recalled the intake gasket but I have not received anything on this recall.
Air conditioner, compressor, clutch and belt tensionor on Chevrolet Tahoe. Belt tensionor breaks locking up causing compressor clutch to sieze then causing compressor to disentergrate internally shooting internal components thru accumalator and inside vehicle climate control system. Serpentine belt tenstsionor could cause belt to break which drives the entire system to include power steering. This is a common problem for Chevrolet models, however it May only begin having the problem at 3-4 years of ownership therefore appearing to be a normal breakdown of components. The problem is common enough the dealers and experienced mechanics maintain the parts as basic stocked items.
A scheduled oil change on my 2003 Chevy Tahoe revealed broken metal pieces. Cormier Chevrolet who is my service/purchase dealer determined that the debris came from 3 broken rocker arms. Cormier made the necessary repairs under warranty, however, 3 months later the same problem manifested itself again. This time cormier replaced all 16 rocker arms, but I had to pay a $100.00 deductible. I feel the necessary repairs were caused by defective assembly and/or parts. Especially when my vehicle is driven 98% of the time on local roads only, and has just 35,015 total miles and was purchased brand new.
Bought vehicle in February of 2009 used after driving truck for about 10 days we realized that the speedometer was not moving when the vehicle was in motion. Then after that the speedometer would move up in speed after driving the car for about 20 minutes but then stay at the 30mph when stopped once the car would begin moving again the speed would continue to go up from the 30mph mark resulting in the speedometer reading 60mph when the vehicle was actually only going 30mph. This has continued every day since it was noticed so when driving the car you never know how fast the car is actually traveling.
Engine complaints in other Tahoe years
Frequently asked questions
How common are engine problems on the 2003 Chevrolet Tahoe?
NHTSA has 29 complaints about the engine & cooling of the 2003 Chevrolet Tahoe, 6% of the model year's 507 complaints. The component named most often is exhaust system › manifold/header/muffler/tail pipe (4 mentions).
Is there a recall for 2003 Chevrolet Tahoe engine problems?
No. NHTSA lists no engine & cooling recall for the 2003 Chevrolet Tahoe, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2003 Chevrolet Tahoe engine problems start?
Half of the complaints with a recorded mileage happened before about 104,000 miles, and 29% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 2 fires and 3 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.