2003 GMC Yukon: check engine light

8 of the 204 complaints about the 2003 GMC Yukon describe check engine light.

owner complaints: 8
of this car's complaints: 4%
typical mileage: 115,000
recalls: 0

Is there a fix? 128 service bulletins cover this area of the car. See below

Check engine light by model year

2026
6
2025
7
2024
8
2023
28
2022
15
2021
60
2020
8
2019
13
2018
10
2017
11
2016
17
2015
8
2014
3
2013
2
2012
1
2011
7
2010
3
2009
6
2008
7
2007
22
2006
1
2005
2
2004
5
2003
8
2001
3
1999
4

What owners say

Filed Mar 6, 2015 · Engine · 160,000 miles · TX

Found a broken off exhaust manifold bolt on driveway 3 years ago. Found another broken one today. Both are from the same side. Now instead of 6 bolts I have 4 bolts. This is causing an exhaust leak, engine light and emissions problems that harm the environment. This is an ongoing problem per this article: https://www.youtube.com/watch?v=0yg6wlbnzgi.

Filed Sep 2, 2014 · Engine · 115,000 miles · GA

Tl* the contact owns a 2003 gmc yukon. While driving approximately 30 MPH, the engine stalled and the check engine warning indicator illuminated. The vehicle was coasted to the shoulder of the road. The engine restarted after several attempts, but the failure recurred. The dealer was unable to diagnose the cause of the failure. The vehicle was not repaired and the manufacturer was not notified. The approximate failure mileage was 115,000.

Filed Dec 29, 2013 · Engine · 150,000 miles · NY · crash

Reduced engine power. Truck goes into traction control while driving or turning stability control is off. Check engine lite goes on and off while driving mass flow sensor keeps coming on.

Filed Oct 28, 2013 · Acceleration, Driver assistance · 143,256 miles · PA

Wife driving truck to work " reduced engine power", message came on the dash, and also said traction control was disabled. Power was reduced gradually to ten miles per hour. She floored the gas, nothing. Turned it off, restarted it, nothing. Engine light and traction disabled lighted were illuminated. Also the rear mirror temperature display flickers all the time. Drl burn out almost daily. Gmcs have major electrical issues before people start dying. Imagine a car shutting down on you while on the highway. That an accident waiting to happen. The rear wiper works when it feels like working, there is also a message about fixing the ride control. For all the bail money gmc got, they should recall these mistakes they made.

Filed Sep 18, 2012 · Driver assistance, Electrical · 100,000 miles · MO

Hello, when im driving down the road the reduced engine light comes on. This is very dangerous since it also happens on the highway. When I shut the car off and let it sit for 3 or 4 min and restart it will happen again about 2 miles down the road. Gmc says they know about the issue but they do not have a fix for it. I have taken it to several shops and they say that gm says the same thing ( we know about the issue but do not have a fix for it). There should be a recall on these vehicles do to this happening and could cause a major accident. There are alot of other ppl having this same issue. Thanks

Filed Oct 17, 2004 · Fuel system · 18,000 miles · LA

Driving 60 MPH on a 20 mile bridge, the engine failed (engine light and traction control light were on. No power steering or power brakes. Nothing appeared to be overheated. 2 hrs later it started, 5 minutes later it killed again. Towed to nearest dealership. They road tested it and car failed again. Found 1 broken wire inside wire insulation. Repaired. Picked up car and it failed 1 mile later, took it back to dealership on "reduced engine power". They found 2 more broken wires. Replaced harness. One week later it happened again. After brief wait it started and ran for another day until I could get it to the dealership purchased from. They could not find anything wrong. Two weeks later it failed again. Tow truck took it to another dearlership. They changed another part relative to the fuel system and said it "may" be fixed. I refuse to pick it up or drive it again; it's dangerous and undependable. Have asked gm for another car and I am waiting for their response.

Filed Mar 13, 2003 · Acceleration · 3,400 miles · NJ

While driving or idling, the "check engine light" is displayed. Engine goes into "reduced power mode". Dealer replaced accelerator control module. This did not correct the problem. They now think it is the throttle body. Time will tell, mean while I am without my $45,000.00 truck.

Filed Jan 30, 2003 · 1,000 miles · NY

While driving intermittently the engine light comes on, vehicle vibrates and speed will decrease to 30 MPH all at the same time. The dealership can not locate problem, but thinks it has to do with the throttle body. Please provide more details.