2004 GMC Yukon Denali Problems

What owners report

Owners of the 2004 GMC Yukon Denali most often report problems with the instrument cluster, especially a speedometer that reads wrong, sticks, or quits. Brake line corrosion that lets the pedal drop to the floor is the other frequently described theme, followed by traction control and stability control warnings that cut engine power. Reports span a wide mileage range, from a few thousand miles to well past 100,000.

1. 1
   Electrical system

   Speedometer fails, sticks or reads wrong

   • 40 complaints (37%)
   • median 61,750 mi at 3.9 yrs old (31 state mileage)
   • filed 2006–2017

   Complaints describe the speedometer needle pegging out, reading a high speed while parked, drifting down to zero, or quitting altogether, sometimes along with the tachometer or other gauges. Owners report the problem can come and go and often worsens over time, and several mention being told the whole instrument cluster needs replacing. Some say the dealer or manufacturer would not cover the repair, citing an expired cluster warranty or mileage limits. Mostly reported between roughly 30,000 and 80,000 miles, with some at higher mileage and a few mentions of cold weather.

   5 related service bulletins

   What to check: Drive the vehicle and watch the speedometer against a GPS or scan tool reading; also check that the tachometer and other gauges settle to zero when idling or keyed off. Ask whether the instrument cluster has ever been replaced or repaired.

   2 excerpts from owner complaints in NHTSA records

   “First my oil gauge started giving false readings on my 2004 Gmc denali, I could live with that. Then my speedometer readings are all over the place...all the time with different readings. I am scared for my safety and the safety of others. From reading online this is a very common problem on Gmc vehicles and I feel something should be done by Gmc to remedy the problem!!!”

   NHTSA complaint #10173206, filed 2006-11, 65,000 miles

   “I started my car and while I was in park the speedometer said 70mph. While I was driving it would register over 120mph. I had no idea what speed I was truly going. This is a scary feeling especially with my three children in the car. I tried turning off the car putting it in drive and back to park thinking perhaps it was stuck, but nothing works. I see this is a common problem...help??”

   NHTSA complaint #10607635, filed 2014-07, 164,020 miles
2. 2
   Brakes

   Brake pedal goes to the floor (corroded brake lines)

   • 11 complaints (10%)
   • median 80,000 mi at 8.1 yrs old (11 state mileage)
   • 2 mention a crash, fire or injury
   • filed 2005–2015

   Complaints describe the brake pedal sinking to the floor with little or no warning and the vehicle failing to slow, sometimes with brake fluid leaking underneath. Owners report that inspection found brake lines rusted or fractured, and that repair involved replacing lines or a repair kit. Several mention being quoted a repair cost and that the manufacturer or dealer declined to cover it. Typically reported between about 55,000 and 120,000 miles, in vehicles described as older and driven in wet or snowy regions.

   What to check: Have a mechanic inspect the hard brake lines along the frame and above the rear axle for rust pitting, and check the fluid level and for wet spots. Ask whether the lines or a repair kit have already been replaced.

   2 excerpts from owner complaints in NHTSA records

   “Spring of 2013 I lost my brakes ,lines and connectors totally rusted out (replaced).july 2013 my full tank of gas poured out all over the ground.sending unit ,feed line, return line totally rotted and blew out.but the pump still worked. Lol (all replaced).I bought this truck with 70000 miles on it at 5 years old.from a volvo dealership.I only put 10000 miles on it in approximately 4 years.I keep it well maintained and change the oil every 3000 miles.whats next? …”

   NHTSA complaint #10524671, filed 2013-07, 80,000 miles

   “During normal driving, brake pedal will sometimes go to the floor when attemping to stop, and vehicle will not slow down at all. After second attempt, brakes start working again. No errors reported by vehicle computer. We have already hit a mailbox trying to avoid a crash, and almost rolled over another time due to not being able to slow down in time. Two GM dealers have found no problems, and we have been told to not bring the vehicle back to them as they say nothing is wrong with it. Problem happens approx. …”

   NHTSA complaint #10129658, filed 2005-07, 3,500 miles
3. 3
   Electronic stability control

   Stability control or traction control cuts power

   • 9 complaints (8%)
   • median 130,000 mi at 9.0 yrs old (9 state mileage, few)
   • filed 2009–2015

   Complaints describe a 'stability control disabled' or traction control warning, often followed by reduced engine power or the engine shutting off, sometimes at highway speed. Owners report restarting after a short wait restores normal operation, and that dealers replaced wheel speed sensors, a hub, or an APP sensor with mixed results. Others describe traction control engaging on dry pavement or the vehicle locking a front brake and pulling. Mostly reported from about 75,000 to 140,000 miles.

   What to check: Look for a stored ABS or traction control code with a scan tool and check the wheel speed sensors and wiring at each hub. Ask whether any sensor or hub has been replaced and whether the warning returns.

   2 excerpts from owner complaints in NHTSA records

   “The ABS traction control on my 2004 Yukon Denali activates on dry roads and nearly caused a serious accident. While pulling out onto the road, the traction control kicked in and cut power to the truck. I couldn't accelerate and was almost hit by oncoming traffic.”

   NHTSA complaint #10290713, filed 2009-11, 144,000 miles

   “The stability control disabled sensor comes on followed by reduced engine power and my vehicle won't go faster than 5mph. This has happened at least 6 times in the past several months only upon start up of the vehicle. Sometimes, if I wait a couple of minutes and restart my car, it'll start just fine but the check engine light comes on. I first brought it into hendrick chevrolet on 10/15/12. They charged me almost $700 to replace app sensor assembly . Then I brought it in again on 11/6/12 for the same issue. …”

   NHTSA complaint #10501116, filed 2013-03, 137,509 miles
4. 4
   Exterior lighting

   Turn signals flash both sides or lights act up

   • 13 complaints (12%)
   • median 93,000 mi at 7.5 yrs old (12 state mileage)
   • filed 2004–2015

   Complaints describe the turn signals flashing like hazard lights on both sides rather than only the selected side, and in one case a headlight fuse that blew repeatedly. Owners report replacing bulbs and switches without resolving it, and say the dealer treated it as out of warranty rather than a covered repair. Reported from very low mileage up to about 75,000 miles.

   What to check: With the key on, signal left and then right and confirm only that side flashes, and check the hazard function and marker lights. Ask whether the multifunction switch or flasher has been replaced.

   2 excerpts from owner complaints in NHTSA records

   “There are several complaints, on the 2004 Gmc denalis. It's like it starts slow your gauges go out. You have no idea how fast you are going! Then the oil, temp for engine, and transmission. Which I had to replace. Then the brakes get a mind of their own. Recently the radio & lights are acting up which is scary, I have a 7 yr. Old. The heat in the back doesn't work for her, so I have several blankets for her. The television quit long ago, it was one of the reasons we bought the car, so kids could watch television on long trips, or whenever. …”

   NHTSA complaint #10691001, filed 2015-02, 96,000 miles

   “The driver wishing to signal a turn by moving the directional signal lever, (up or down) may cause the front marker/turn lights and rear turn lights to flash in a manner similar to hazard warning, rather than flashing on the desired side only. Same as NHTSA campaign number: 05v198000 why wasn't yukon included in this recall?”

   NHTSA complaint #10226311, filed 2008-04, 73,000 miles
5. 5
   Other or unknown

   Rear hatch or door latches open while driving

   • 5 complaints (5%)
   • median 120,000 mi at 7.5 yrs old (5 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2006–2014

   Complaints describe the rear hatch or rear doors working open on their own or not closing properly, triggering an open-door warning while driving. One owner reports the latches were replaced and the problem returned. Another describes the spare tire carrier releasing and dropping the tire. Reported from a few thousand miles up to about 150,000 miles.

   What to check: Open and close the rear hatch and doors several times and check that the warning light stays off, and confirm the spare tire hoist holds the tire securely.

   2 excerpts from owner complaints in NHTSA records

   “The rear hatch of our denali works itself open. We shut it sufficiently hard, and in time, driving down the road, the warning lights overhead and on the dash board come on telling us that the rear hatch is open. We have to stop to open and reshut it. This does not happen every time but has been consistent since we purchased it.”

   NHTSA complaint #10169245, filed 2006-09, 4,161 miles

   “The contact owns a 2004 Gmc Yukon Denali. The contact stated that the spare tire safety release did not work. The contact called the dealer who forced the tire safety release to work. The contact called the manufacturer who offered no assistance. The current mileage was approximately 92,000. The failure mileage was approximately 90,000.”

   NHTSA complaint #10367769, filed 2010-11, 90,000 miles

Buying note. On a 2004 Yukon Denali, spend time on the instrument cluster and the brake lines first, since those are the two most commonly described problems and both affect basic driving. A scan tool check for stored codes and a look underneath at the brake lines and latches will tell you more than a short test drive.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.