Most common 2001 GMC Denali problems
Share of the 22 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
GMC Denali complaints by model year
Best Denali years: 2010, 2013, 2014. Years to avoid: 2003, 2002, 2015, 2000. Compare all years →
2001 GMC Denali recalls (1)
Seats › Front assembly › Head restraint
On certain sport utility vehicles equipped with rearward folding head restraints on the second row seats, two potential pinch points exist on each of the folding head restraints when the restraints are folded rearward as the seatback is folded down.
Remedy: Dealers will install protective covers over the pinch points. Owner notification began November 8, 2002. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free…
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2001 GMC Denali:
Parking brake failure
Odi's review of complaint data received since the close of ea04-011 revealed no indication that the investigation should be re-opened.more details can be found in the federal register notice enclosed in the dp05-009 public file.odi reserves the right to reopen the investigation in the future should conditions warrant.
What 2001 GMC Denali owners say
Brakes
We have noticed that our cars anti-lock brakes activate when we get to a low speed of about 5 MPH, causing our stopping distance to be increased, which almost caused us to rear-end another car. We bought the car used about 3 months ago and noticed this problem on thanksgiving of this year. There is a recall for this problem through NHTSA campaign id number: 05V379000. We called GMC hotline and they say it isn't covered by the recall. I see the recall has been revised several times already. Can anything be done before an accident does occur?
Tried to stop at red light ,and the brake pedal went all the way down I had to jump the curb not to hit another car. My husband came and looked at the truck and saw the brake lines were rusted through and fluid was coming out. He put a whole can of brake fluid in so that I could move the truck down the street to a service center. Again the repair man said all the brake lines are rusted out. We repaired one a summer ago with the same issue.
Transmission & drivetrain
Dt: the contact stated the transmission seal was defective after a certain amount of miles, it allowed the cooling system to leak into the transmission. When accelerating the transmission would down shift into first gear, this would make the vehicle jump. The transmission failed at an intersection. When this occurred the vehicle had to be driven home and to the dealership in first gear. It was taken to the dealership who diagnosed the problem. The transmission seal broke because the transmission was down shifting too hard. Updated 11/16/2005 - the headlamp lens was loose. The power steering pulley was out of position and caused the serpentine belt is squeaking. The pulley was repositioned. A small fuel vapor leak was detected possibly from fuel filler cap not being fully tightened. The fuel pump leaked when the tank was full. It was necessary to replace the fuel tank sending unit. …
Tl contact owns a 2001 GMC Denali. Everytime the vehicle undergoes a routine oil change, the contact has to place an excessive amount of oil back in the engine shortly afterwards. In addition, the battery terminal cables sporadically loosen and cause the alternator to fail. Thirdly, while driving at various speeds, the 4 wheel drive spontaneously engages. Lastly, the vehicle idles roughly when it is started. The vehicle was taken to the dealer on numerous occasions, but they could not correct the failure. The contact has copies of the vehicle's service history. The failure mileage was 90,000 and current mileage was 163,000.
Engine & cooling
Tl contact owns a 2001 GMC Denali. Everytime the vehicle undergoes a routine oil change, the contact has to place an excessive amount of oil back in the engine shortly afterwards. In addition, the battery terminal cables sporadically loosen and cause the alternator to fail. Thirdly, while driving at various speeds, the 4 wheel drive spontaneously engages. Lastly, the vehicle idles roughly when it is started. The vehicle was taken to the dealer on numerous occasions, but they could not correct the failure. The contact has copies of the vehicle's service history. The failure mileage was 90,000 and current mileage was 163,000.
Tl contact owns a 2001 GMC Denali. While making turns at less than 5 MPH, the engine makes a rumbling noise and the vehicle stalls. The dealer stated that there were no recalls for the vehicle; however, the contact has found complaints for her vehicle regarding the same failure. The dealer also stated that they would diagnose the vehicle at $96 per hour. The contact would have to pay for the repairs. The vehicle is currently parked at her residence. The failure mileage was 70,000 and current mileage was 85,000.
Frequently asked questions
Is the 2001 GMC Denali a good car?
Based on 22 owner complaints filed with NHTSA, the 2001 Denali rates average: 1.3× as many complaints as a typical year of the Denali at the same age. 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 2001 GMC Denali?
The brakes — 6 complaints, 27% of all complaints for this model year, most often about antilock/traction control/electronic limited slip. Next are the transmission & drivetrain (5) and engine & cooling (3).
How many recalls does the 2001 GMC Denali have?
There is 1 recall for the 2001 GMC Denali, the most recent from September 17, 2002 (head restraint). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the GMC Denali?
The best years by complaints, compared at the same age, are 2010, 2013 and 2014. Years to avoid or approach with caution: 2003, 2002, 2015 and 2000. See the full GMC Denali years comparison.
At what mileage do 2001 GMC Denali problems happen?
The median mileage reported in complaints is about 64,000 miles; 29% 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.