Showing the 2006 Sierra 15 Hybrid 4WD: as EPA lists it. Recalls and complaints cover the whole model year. Every version
Owner complaints, recalls, fuel economy and safety ratings from public NHTSA and EPA data, updated Oct 17, 2026.
Fuel economy
16 mpgcombined; city 15, highway 18; the 15 Hybrid 4WD
Five years of fuel
$20,300U.S. average; Ohio $18,140 at local prices; the 15 Hybrid 4WD; fuel only, not other costs of owning it; 15,000 miles a year, at EIA fuel prices for the week of Oct 12, 2026
NHTSA's VIN data lists no trims for the 2006 Sierra, so these are the versions EPA tested, by its names. Recalls and complaints cover the whole model year: whether a recall applies to a car depends on its VIN, on NHTSA's recall lookup.
Owners have filed 203 complaints with NHTSA about the 2006 Sierra. These are unverified owner reports, counted by the part of the car they name; one complaint can name several parts. Counts aren't adjusted for how many were sold, so they don't show how reliable a car is.
Complaints by part of the car
Part
Complaints
Crashes
Fires
Injuries
Service brakes
61
5
0
2
Service brakes, hydraulic
33
3
0
0
Electrical system
27
0
3
1
Suspension
17
0
1
0
Power train
16
2
0
0
Air bags
12
2
0
1
Steering
11
1
0
1
Structure
10
0
0
0
Tires
9
1
0
0
Fuel system, gasoline
8
0
2
0
Exterior lighting
6
0
0
0
Wheels
6
1
0
1
16 more parts
Engine
5
1
0
0
Engine and engine cooling
4
0
1
0
Visibility
4
0
1
0
Equipment
3
0
0
0
Fuel/propulsion system
3
0
0
0
Unknown or other
3
0
0
0
Seats
2
0
0
0
Child seat
1
0
0
0
Electronic stability control (ESC)
1
0
0
0
Latches/locks/linkages
1
0
0
0
Parking brake
1
0
0
0
Seat belts
1
0
0
0
Service brakes, air
1
0
0
0
Service brakes, electric
1
0
0
0
Vehicle speed control
1
0
0
0
Visibility/wiper
1
0
0
0
Complaints by model year
Newer years have had less time to collect complaints, and counts aren't adjusted for sales, so a shorter bar doesn't mean a more reliable year.
NHTSA lists 4 recall campaigns for the 2006 Sierra over its history. Campaigns are matched by model and year, so each one may apply to a given car, and its repair may already be done: check a VIN on NHTSA's recall lookup for the open recalls on that exact car.
CERTAIN SPORT UTILITY VEHICLES AND TRUCKS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES HAVE AN INCOMPLETE TIRE RIM DESIGNATION ON THE CERTIFICATION/TIRE LABEL LOCATED ON THE DRIVER'S DOOR EDGE. IN ADDITION, THE LABEL MAY ALSO BE MISSING THE TIRE LOAD RATING ON THE LABEL. ALTHOUGH THIS INFORMATION IS NOT REQUIRED BY THE STANDARD, IF A TIRE OF A LESSER LOAD RATING IS INSTALLED, THE TIRE MAY NOT BE ABLE TO SUSTAIN THE LOADS ENCOUNTERED DURING USE.
Risk: IF A CUSTOMER REPLACES A WHEEL AND ONLY RELIES ON THE RIM SIZE DESIGNATION THAT IS INDICATED ON THE LABEL, A WHEEL THAT IS OF A DIFFERENT RIM CONTOUR DESIGNATION MAY BE INSTALLED. IT MAY BE DIFFICULT OR IMPOSSIBLE TO MOUNT THE TIRE ON A WHEEL WITH THE WRONG CONTOUR. IF THE TIRE IS MOUNTED ON THE WHEEL WITH THE WRONG CONTOUR, THE WHEEL AND TIRE MAY NOT PERFORM AS INTENDED, WHICH COULD INCREASE THE RISK OF A CRASH.
Remedy: A LABEL THAT WILL CORRECT THE LABEL ORIGINALLY INSTALLED WILL BE MAILED TO CONSUMERS ALONG WITH INSTALLATION INSTRUCTIONS. THE CUSTOMER WILL HAVE THE OPTION FOR DEALERS TO INSTALL THE LABEL. THE RECALL BEGAON ON NOVEMBER 7, 2006. OWNERS SHOULD CONTACT CADILLAC AT 1-866-982-2239, CHEVROLET AT 1-800-630-2438, AND GMC TRUCKS AT 1-866-996-9463.
ON CERTAIN TRUCKS EQUIPPED WITH AN 8.1L V8 (RPO L8-VIN G) ENGINE HAVE A CONDITION IN WHICH THE ENGINE FUEL RAIL PULSE DAMPER RETAINER CLIP MAY FRACTURE RESULTING IN INADEQUATE RETENTION OF THE DAMPER.
Risk: IF THE DAMPER COMES LOOSE, A FUEL LEAK MAY RESULT. FUEL LEAKAGE, IN THE PRESENCE OF AN IGNITION SOURCE, COULD RESULT IN A FIRE.
Remedy: DEALERS WILL REPLACE THE ENGINE FUEL RAIL PULSE DAMPER RETAINER CLIP FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 31, 2006. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438 AND GMC TRUCKS AT 1-866-996-9463.
CERTAIN TRUCKS AND SPORT UTILITY VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES WERE SHIPPED WITH TIRE AND LOADING INFORMATION LABELS LISTING AN INACCCURATE VEHICLE CAPACITY WEIGHT.
Risk: A MISPRINTED LABEL COULD LEAD TO IMPROPER VEHICLE LOADING SPECIFICATIONS OR TIRE INFLATION WHICH COULD RESULT IN A TIRE FAILURE, INCREASING THE RISK OF A CRASH.
Remedy: OWNERS WILL BE PROVIDED WITH CORRECTED LABELS AND INSTALLATION INSTRUCTIONS. AT THE CUSTOMER'S OPTION, A DEALER CAN INSTALL THE LABEL FOR THEM. THE RECALL BEGAN ON MARCH 31, 2006. OWNERS MAY CONTACT BUICK AT 1-866-608-8080, CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, HUMMER AT 1-800-732-5493, PONTIAC AT 1-800-620-7668, SATURN AT 1-800-972-8876, OR ISUZU AT 1-800-255-6727.
CERTAIN PASSENGER VEHICLES MAY HAVE BEEN BUILT WITH A POWER STEERING HOSE THAT IS NOT TO SPECIFICATION. UNDER EXTREME STEERING MANEUVERS, SUCH AS TURNING THE STEERING WHEEL FULLY TO THE LEFT OR RIGHT WHILE BRAKING, THE HOSE MAY FRACTURE AND LEAK FLUID.
Risk: IF THIS WERE TO OCCUR, POWER STEERING ASSIST WOULD BE LOST AND INCREASED STEERING EFFORT WOULD BE REQUIRED. ON VEHICLES EQUIPPED WITH HYDRO-BOOST POWER BRAKES, IT COULD ALSO RESULT IN LOSS OF POWER BRAKE ASSIST AND INCREASED BRAKING EFFORT WOULD BE REQUIRED. IF THE POWER STEERING FLUID SPRAY WERE TO SPRAY ONTO HOT ENGINE PARTS, AN ENGINE COMPARTMENT FIRE COULD OCCUR.
Remedy: DEALERS WILL INSPECT THE POWER STEERING HOSE(S) FOR TWO SUSPECT DATE CODES AND REPLACE THEM IF REQUIRED. THE RECALL WILL BEGIN ON OCTOBER 14, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, BUICK AT 1-866-608-8080, CADILLAC AT 1-866-982-2339, ISUZU AT 1-800-255-6727, OR HUMMER AT 1-800-732-5493.
Carmakers sent NHTSA 556 service bulletins and notices that cover the 2006 Sierra, the latest on Jul 18, 2025. They tell dealers how to fix known issues.
The parts they mention most: equipment (164), engine and engine cooling (107), electrical system (100), power train (65), equipment adaptive/mobility (26).
NHTSA hasn't opened a defect investigation that covers this model year.
Maintenance
Oil
The owner's manual gives the oil and how often to change it. We show oil facts only once we've checked them against the manual, and we haven't yet for the 2006 Sierra.
These are searches on those sites; we don't copy or check their listings. Your ZIP is used for these links and never kept.
Specs
EPA class: standard pickup trucks. Each version EPA tested:
Swipe the table sideways for more columns.
Version
Engine
Transmission
Fuel
City / hwy / comb
Sierra 15 Hybrid Rear-Wheel Drive
5.3 L, 8 cyl
Automatic 4-spd
Regular Gasoline
16 / 19 / 17
Sierra 15 Hybrid 4-Wheel or All-Wheel Drive
5.3 L, 8 cyl
Automatic 4-spd
Regular Gasoline
15 / 18 / 16
Sierra 1500 Rear-Wheel Drive
4.3 L, 6 cyl
Automatic 4-spd
Regular Gasoline
15 / 20 / 17
Sierra 1500 Rear-Wheel Drive
4.8 L, 8 cyl
Automatic 4-spd
Regular Gasoline
15 / 19 / 17
Sierra 1500 Rear-Wheel Drive
4.3 L, 6 cyl
Manual 5-spd
Regular Gasoline
14 / 20 / 16
Sierra 1500 Rear-Wheel Drive
4.8 L, 8 cyl
Manual 5-spd
Regular Gasoline
14 / 19 / 16
Sierra 1500 Rear-Wheel Drive
5.3 L, 8 cyl
Automatic 4-spd
Regular Gasoline
14 / 19 / 16
Sierra 1500 Rear-Wheel Drive
5.3 L, 8 cyl
Automatic 4-spd
Regular Gasoline or E85
14 / 19 / 16
Sierra 1500 Rear-Wheel Drive
6.0 L, 8 cyl
Automatic 4-spd
Premium Gasoline
13 / 18 / 15
Sierra 1500 4-Wheel or All-Wheel Drive
4.3 L, 6 cyl
Automatic 4-spd
Regular Gasoline
13 / 17 / 15
Sierra 1500 4-Wheel or All-Wheel Drive
4.3 L, 6 cyl
Manual 5-spd
Regular Gasoline
13 / 18 / 15
Sierra 1500 4-Wheel or All-Wheel Drive
4.8 L, 8 cyl
Automatic 4-spd
Regular Gasoline
14 / 18 / 15
Sierra 1500 4-Wheel or All-Wheel Drive
4.8 L, 8 cyl
Manual 5-spd
Regular Gasoline
14 / 18 / 15
Sierra 1500 4-Wheel or All-Wheel Drive
5.3 L, 8 cyl
Automatic 4-spd
Regular Gasoline
13 / 18 / 15
Sierra 1500 4-Wheel or All-Wheel Drive
5.3 L, 8 cyl
Automatic 4-spd
Regular Gasoline or E85
13 / 17 / 15
Sierra 1500 4-Wheel or All-Wheel Drive
6.0 L, 8 cyl
Automatic 4-spd
Premium Gasoline
13 / 16 / 14
Sierra 1500 4-Wheel or All-Wheel Drive
6.0 L, 8 cyl
Automatic 4-spd
Premium Gasoline
12 / 16 / 13
Sources and dates
U.S. EPA fuel economy data, file of Sep 29, 2026
NHTSA owner complaints, file of Oct 17, 2026
NHTSA recalls, file of Oct 17, 2026
NHTSA manufacturer communications, file of Oct 17, 2026
NHTSA defect investigations, file of Oct 17, 2026
NHTSA 5-Star Safety Ratings, file of Aug 7, 2026
U.S. Energy Information Administration, file of Oct 12, 2026
Fuel cost: EPA mpg with fuel prices for the week of Oct 12, 2026 and electricity prices for Jul 2026. Source: U.S. Energy Information Administration (Oct 2026). Complaints are unverified reports owners filed with NHTSA. About the data