Most common 2003 GMC Yukon XL 1500 problems
Share of the 63 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
GMC Yukon XL 1500 complaints by model year
Best Yukon XL 1500 years: 2000, 2006, 2012. Years to avoid: 2007, 2003, 2004, 2005. Compare all years →
What 2003 GMC Yukon XL 1500 owners say
Electrical system all 24 →
While traveling to work my vehicles check engine light came on and the reduced power warning came on at which time I had complete loss of acceleration, complete loss of braking, and complete loss of steering power. I then had to coast to a stop and attempted to restart the vehicle 6 times before I was able to get the reduced power warning to go off and was able to drive although the check engine light stayed on. This is the 2nd time this has happened to me in 2 days with the loss of power. I have had the reduced power warning on numerous occasions years past but never have I lost total / absolute power to control the vehicle, this is a total death trap for anyone who has had this experience, especially on the freeway or highways at high speeds. I have read numerous accounts of this same issue affecting other GMC owners and have seen no resolutions or any recalls from GMC. …
Tl* the contact owns a 2003 GMC Yukon XL 1500. The contact mentioned that the previous owner of the vehicle experienced a failure with the reduced engine power warning indicator. The dealer replaced the throttle body, but the failure continued before the contact owned the vehicle. The contact experienced the warning light randomly flashing, which drastically reduced the speed to less than 20 MPH. The contact had to constantly turn off and restart the vehicle, but the failure continued to progress randomly. The dealer replaced the wiring, 02 sensor, the throttle body was replaced a second time, the battery, and the alternator. The repairs failed to provide a permanent solution and the warning light continued to illuminate for the reduced engine power. The vehicle was not repaired. The manufacturer was not notified. The approximate failure mileage was 188,000.
Brakes
Iwas driving at low speed went to stop at stop sign when brake peddle went to floor.I crashed into stop sign to stop . Truck was towed to dealer. I was told to major brake line burst. Truck is now at dealer being fixed. At a price of 2800.00. Something has to be done. This can't go on any longer.
While traveling to work my vehicles check engine light came on and the reduced power warning came on at which time I had complete loss of acceleration, complete loss of braking, and complete loss of steering power. I then had to coast to a stop and attempted to restart the vehicle 6 times before I was able to get the reduced power warning to go off and was able to drive although the check engine light stayed on. This is the 2nd time this has happened to me in 2 days with the loss of power. I have had the reduced power warning on numerous occasions years past but never have I lost total / absolute power to control the vehicle, this is a total death trap for anyone who has had this experience, especially on the freeway or highways at high speeds. I have read numerous accounts of this same issue affecting other GMC owners and have seen no resolutions or any recalls from GMC. …
Speed control & acceleration
There is an error message that displays on the dash for myself and thousands of others who own GMC/Chevy trucks with these motors. They have a defective throttle position sensor with the truck where it says "reduced engine power". I've found 2 technical service bulletins that somewhat address the issue, but many people take their trucks to mechanics and dealerships to get the issue fixed and spend thousands of dollars in repairs and troubleshooting to get the issue resolved, to no avail. The 2 technical service bulletins that I found were #pip3089b (dated 10/31/2006) and #pip3042a (dated 8/30/2004). I've seen on many many forum posts about this issue and possible fixes, which when I read deeper into them, seem to not be true fixes.
Vehicle has been serviced several times since first occurrence in September 2014. "reduced engine power" and service engine soon signals appear on vehicle panel causing engine power to be reduced in a matter of seconds. Has happened to me going 10mph, 55mph, and 70mph on highway, causing a near rear collision because I lost power so quickly. I have had it serviced 6 or 7 times since September 2014 and this issue is not getting resolved. Throttle body sensor replaced twice, throttle body harness replaced, all wires, and sensors have been cleaned and thoroughly inspected. Reduced engine power occurs weekly even after being serviced.
2003 GMC Yukon XL 1500 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 5.3L 8-cyl | 4-speed automatic | RWD | 12 / 17 / 14 |
| 5.3L 8-cyl | 4-speed automatic | 4WD/AWD | 13 / 17 / 14 |
| 6.0L 8-cyl | 4-speed automatic | 4WD/AWD | 11 / 15 / 13 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2003 GMC Yukon XL 1500 a good car?
Based on 63 owner complaints filed with NHTSA, the 2003 Yukon XL 1500 rates avoid: 3.5× as many complaints as a typical year of the Yukon XL 1500 at the same age. It is one of the Yukon XL 1500 years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2003 GMC Yukon XL 1500?
The electrical system — 24 complaints, 38% of all complaints for this model year, most often about instrument cluster/panel. Next are the brakes (17) and speed control & acceleration (8).
How many recalls does the 2003 GMC Yukon XL 1500 have?
NHTSA lists no recalls for the 2003 GMC Yukon XL 1500. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the GMC Yukon XL 1500?
The best years by complaints, compared at the same age, are 2000, 2006 and 2012. Years to avoid or approach with caution: 2007, 2003, 2004 and 2005. See the full GMC Yukon XL 1500 years comparison.
At what mileage do 2003 GMC Yukon XL 1500 problems happen?
The median mileage reported in complaints is about 95,000 miles; 8% of problems with a recorded mileage started before 50,000 miles.
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.