ChevroletBlazer 2WD2005Overview/chevrolet/blazer-2wd/2005/base/

2005 Chevrolet Blazer 2WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2005 Blazer 2WD.

Transmission Automatic 4-spd

As a rear-wheel-drive SUV from Chevrolet's enduring Blazer lineup, the 2005 Blazer 2WD pairs a gasoline engine requiring 4.5 quarts of 5W-30 API oil with a four-speed automatic transmission, delivering EPA ratings of 15 mpg city, 20 mpg highway, and 17 mpg combined. Owner feedback for this model year has been notably light, totaling just 15 complaints with the fuel system emerging as the most-cited category and zero recalls on record. That figure looks especially modest against the model's complaint history from 1990 through 2003, which peaked at 1,418 reports in 1995 and bottomed out at 43 in 1990, positioning the 2005 as one of the quieter chapters in the Blazer's reliability story.

Model year200519871984

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4.5 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified
EPA fuel economy15/20/17 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 75 · 525 CCA battery, OE oil filter 12731175. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 75 · 525 CCAOEM · verified
Tire sizeENVOY P245-65R17; TRAILBLAZER P245-70R16OEM · verified

OE service part numbers OEM · verified

Engine oil filter12731175 alt 19210286
Engine air filter19259086
Fuel filter25168594
Spark plug12681665
Battery88861746
Front wiper blades15757007 alt 15757008
Serpentine belt12576453
Thermostat12632948 alt 12551507

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length176.8 in
Overall width67.7 in
Overall height64.6 in
Wheelbase100.4 in
Curb weight3867 lb
Track (front / rear)60.2 / 59.1 in
Weight distribution (front / rear)55/45

Ratings & economy EPA / vPIC

EPA city / highway / combined15 / 20 / 17 mpg
DrivetrainRear-Wheel Drive
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4.5 qt of 5W-30 API engine oil, DOT 3 brake fluid. Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 ft-lbs.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity5
Brake FluidDOT 3
Engine Oil5W-30 · API
Engine Oil Capacity4.5 qt
Engine Oil5W-30 · API
Engine Oil Capacity4.5 qt
Manual Transmission FluidGM part number 12345349

Engine torques

Engine Oil Pan Drain Plug18.0 ft-lbs
Engine Valve Cover Bolts8.85 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)74.0 ft-lbs
Leaf Spring to Chassis Bracket89.0 ft-lbs
Leaf Spring to Rear Shackle89.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket89.0 ft-lbs
Lug Nuts100 ft-lbs
Transfer Case Fill Plug18.0-30.0 ft-lbs
Transfer Case Drain Plug18.0-30.0 ft-lbs
Front Wheel Hub103 ft-lbs

Ignition

Spark Plug ManufacturerAC Delco
Spark Plug Gap0.060 in
Spark Plug Torque11 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.75-2.00 lbs
Oil GroupPAG
Oil Type46
Oil Capacity8.00 oz
Standard BCI Group Number75
Standard BCI Cranking Performance525 cca
Optional BCI Group Number75

Service checks

Pressure Test20 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Fuel Pump Pressure Minimum62.0 psi
Key ON Engine OFF (KOEO)55-62
RPM45-59 @ Idle rpm
Injector Primary Resistance11-14 @ 50-90 degreesF ohms
Engine Compression100

Brakes

Brake ApplicationWITH FOUR WHEEL DISC / WITH STANDARD
Torque to Knuckle77 ft-lbs / 52 ft-lbs / 38 ft-lbs
Minimum Pad ThicknessFront: 0.030; Rear: 0.030 specification
Brake ApplicationWITH FOUR WHEEL DISC / WITH STANDARD
Rotor Max Parallel Variation0.001 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.14 in / 0.787 in / 1.03 in
Rotor Nominal Thickness To1.14 in / 0.787 in / 1.03 in

Multi-step torque procedures OEM · verified

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., step 2: 2211 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 miEngine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate) · Underbody (inspect)
Every 30,000 miFuel Filter (replace) · Wheel Bearing (repack)
Every 45,000 miEngine Air Filter Element (replace)
Every 50,000 miTransmission Fluid & Filter (replace)
Every 100,000 miPCV Valve (inspect) · Spark Plug Wires (inspect) · Spark Plugs (replace)
At 150,000 miAccessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 2005 Chevrolet Blazer 2WD lead in one area — the fuel system, gasoline, 4 of 15 reports (27%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 0 of the reports describe a crash and 2 a fire — a small share of the total, but worth weighing against the fuel system, gasoline pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

0
Open recalls
NHTSA campaigns
0
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
15
Owner complaints
0 involved a crash · 2 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 15 complaints on record, top 8 components.

Fuel System, Gasoline4
Electrical System3
Exterior Lighting,Fuel/Propulsion System1
Fuel/Propulsion System1
Air Bags1
Structure,Latches/Locks/Linkages1
Engine & Engine Cooling,Equipment1
Fuel System, Other1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Blazer 2WD. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2005 Blazer 2WD take?

4.5 qt of 5W-30 API, per the factory manual.

Does the 2005 Blazer 2WD have open recalls?

NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Blazer 2WD get?

EPA figures are 15 city / 20 highway / 17 combined mpg.