1999 GMC Yukon Denali: common problems

Owners of the 1999 GMC Yukon Denali filed 27 complaints with NHTSA, most often about service brakes and engine and cooling. Details by component below, with sources.

Key figures

Owner complaints: 27
involving a crash: 2

What fails most often

1 Service brakes 44% of all complaints
2 Engine and cooling 15% of all complaints
3 Electrical system 11% of all complaints
4 Tires 11% of all complaints
5 Fuel system 7% of all complaints
6 Powertrain 7% of all complaints
7 Steering 7% of all complaints
8 Visibility 7% of all complaints

Circle size and colour show each component’s share of NHTSA complaints. Schematic only, not a drawing of the exact model.

Service brakes: 12 complaints (44% of all), 1 of them with a crash reported by the owner.
Engine and cooling: 4 complaints (15% of all).
Electrical system: 3 complaints (11% of all).
Tires: 3 complaints (11% of all).
Fuel system: 2 complaints (7% of all).

Symptoms owners describe

How many of the 27 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).

rust, corrosion3 · 11%
smoke, burning smell, fire3 · 11%
oil leak or consumption2 · 7%
unintended acceleration2 · 7%
transmission slipping2 · 7%
warning lights, check engine2 · 7%
brake failure1 · 4%
A/C or heater1 · 4%
door locks, latches, handles1 · 4%
fuel system, fuel smell1 · 4%

Components owners complain about

Component	Owner complaints	involving a crash
Service brakes	12	1
Engine and cooling	4	0
Electrical system	3	0
Tires	3	0
Fuel system	2	0
Powertrain	2	0
Steering	2	0
Visibility	2	0
Air bags	1	1
Equipment	1	0
Exterior lighting	1	0
Latches, locks, linkages	1	0
Structure	1	0

What owners report

Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.

On 12/14/07 we were involved in an auto accident. We were traveling at about 50mph and ran into the back of another vehicle. The whole front passenger side of our yukon is totaled. The front end/battery and other items is pushed up into the engine.
Air bags · crash · 2007-12-27 · NHTSA complaint #10212940
The failure was caused by a lack of braking pressure and corrosion build up in the antilock system. The vehicle has not been taken to the dealer. Nhtsa campaign id number 05v379000 (service brakes, hydraulic:antilock:control unit/module) was referenced. The vin, speed, and purchase date were unknown.
Service brakes · crash · 2007-09-10 · NHTSA complaint #10202352
As the vehicle was pulling off a parking lot the brakes went to the floor. After driving home using the parking brake to stop, I pulled the drivers side wheel off and after adding more brake fluid saw the leak at the fuel tank area wile my wife pushed the pedal. All the brake lines look corroded.
Service brakes · 2013-03-16 · NHTSA complaint #10503299
My windshield wipers, windows, radio and door locks will intermittently stop working. I have found several others to be experiencing the same exact problems based on several online forums I found by googling "problems with 99 yukon denali".
Electrical system · 2010-01-21 · NHTSA complaint #10301729
I went to the store again sunday morning and noticed smoke coming out of the drivers door. I immediately pulled over and called the fire dept. After going through my door and pulling off the panel, it was discovered that I had an electrical fire that started from the electric mirror control.
Electrical system · 2008-08-18 · NHTSA complaint #10238717
I was traveling 60 mph on interstate 20 when tire tread/belt began to separate from the tire. Fortunately I was able to steer the vehicle to the shoulder of the road. The tire are not original equipment. I am careful to maintain the proper inflation level of the tires.
Tires · 2008-04-28 · NHTSA complaint #10225979
The rotor failure resulted in the vehicle suddenly surging to the right while braking. The rotor disk become completely separated from the hub mounting flange. The rotor was original from the factory with 95,000 miles on it.
Service brakes · 2007-10-02 · NHTSA complaint #10204712
The service engine light came on in vehicle. I took vehicle to auto zone for a diagnostic check and it stated the pc-valve needed to be replaced and something about the emissions. I took the vehicle to the dealership and they stated the pistons melted on the heads and engine needed to be replaced.
Engine and cooling · 2007-03-05 · NHTSA complaint #10184268

When owners complained

NHTSA complaints by filing year. The peak shows at what age the problems show up most.

20001
20011
20022
20032
20044
20055
20062
20075
20082
20101
20111
20131

Comparison

By complaint count this model year ranks 7,189 of 36,656 model years in the NHTSA data (top 20% most complained about).

On average one model year of the Yukon Denali has 45 complaints (20 years in the data). This year has 27, below average.

What to check before buying

Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Tires. Tire age by DOT code, bulges, wear pattern.

Other years of this model

Questions and answers

What are the most common problems with the 1999 GMC Yukon Denali?

Owner complaints to NHTSA most often mention: service brakes, engine and cooling, electrical system. Total complaints: 27. The most frequent symptoms in complaint texts: rust, corrosion (11%), smoke, burning smell, fire (11%), oil leak or consumption (7%).

How many service bulletins (TSB) were issued for the 1999 GMC Yukon Denali?

NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.

Should I buy a 1999 GMC Yukon Denali from a US auction?

Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.

Other 1999 models

Read also

Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.