GMC Truck›Envoy 2WD›2008›Overview/gmc-truck/envoy-2wd/2008/base/

2008 GMC Truck Envoy 2WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2008 Envoy 2WD.

The 2008 GMC Truck Envoy 2WD is a two‑wheel‑drive variant of the midsize SUV lineup, equipped with an engine that calls for 7 qt of 5W‑30 API oil. Owner feedback for this model year totals 77 complaints, with exterior lighting being the most frequently cited issue and no recalls recorded. When viewed against the Envoy’s complaint history from 1995 to 2009—where the peak year (2003) saw 640 complaints and the low point (1995) just one—the 2008 model sits near the bottom of the spectrum, reflecting a period of comparatively strong reliability.

Model year2008 2005 2003

Quick specs

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

Engine oil capacity7 qtOEM · verified

Engine oil type5W-30 APIOEM · verified

Lug nut torque100 ft-lbsOEM · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 78 · 600 CCA battery, OE oil filter 12731179. 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 78 · 600 CCAOEM · verified

Tire sizeENVOY 2WD/4WD 245-65R17; ENVOY DENALI/XL P245-60R18;OEM · verified

Wheel / rim7.0 (1), 8.0 (1), na inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	12731179 alt 12690386
Engine air filter	19239713
Spark plug	12681663 alt 12621258
Front wiper blades	15214346
Serpentine belt	12576446 alt 12593774
Thermostat	89018168 alt 12561155

Service quick specs OEM factory data

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

This engine holds 7 qt of 5W-30 API engine oil, SYNTHETIC · 75W-90 · GL-5 in the differential. Torque lug nuts to 100 ft-lbs, the oil drain plug to 19.0 ft-lbs. The firing order is 1-8-4-3-6-5-7-2.

Lubricants & capacities

Automatic Transmission Fluid	ATF
Automatic Transmission Fluid Capacity	5
Differential Gear Oil	SYNTHETIC · 75W-90 · GL-5
Differential Gear Oil Capacity	3.6 qt
Engine Oil	5W-30 · API
Engine Oil Capacity	7 qt
Engine Oil	5W-30 · API
Engine Oil Capacity	7 qt

Engine torques

Intake Manifold to Engine Bolts	7.4 ft-lbs
Intake Manifold to Engine Bolts	7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	18.0 ft-lbs
Intake Manifold to Engine Bolts	7.4 ft-lbs
Engine Oil Pan Drain Plug	18.0 ft-lbs
Engine Oil Pan Drain Plug	19.0 ft-lbs
Engine Valve Cover Bolts	9.0 ft-lbs

Chassis torques

Lug Nuts	100 ft-lbs
Transfer Case Fill Plug	20.0 ft-lbs
Transfer Case Drain Plug	20.0 ft-lbs
Front Wheel Hub	103 ft-lbs

Ignition

Cylinder Firing Order	1-5-3-6-2-4
Cylinder Firing Order	1-8-7-2-6-5-4-3
Cylinder Firing Order	1-5-3-6-2-4
Cylinder Firing Order	1-8-4-3-6-5-7-2
Spark Plug Manufacturer	AC Delco
Spark Plug Gap	0.040 in
Spark Plug Torque	13.0 ft-lbs
Spark Plug Manufacturer	AC Delco

Battery & A/C

Refrigerant	R134a
Oil Group	PAG
Oil Type	46
Oil Capacity	6.00-8.00 oz
Standard BCI Group Number	78
Standard BCI Cranking Performance	600 cca
Standard BCI Group Number	78
Standard BCI Cranking Performance	600 cca

Service checks

Pressure Test	15 psi
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	188-206 °F
Pressure Test	15 psi
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	188-206 °F
Key ON Engine OFF (KOEO)	50-57
Key ON Engine OFF (KOEO)	50-57

Brakes

Torque Caliper to Bracket	31 ft-lbs / 23 ft-lbs
Torque to Knuckle	118 ft-lbs / 148 ft-lbs
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 specification
Rotor Max Parallel Variation	0.001 in
Rotor Runout Limit	0.002 in
Rotor Nominal Thickness From	1.141 in / 0.787 in
Rotor Nominal Thickness To	1.141 in / 0.787 in
Rotor Discard at or Under	1.082 in / 0.728 in

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

110 ft. lbs., step 2: 150 ft. lbs., step 3: 180

110 ft. lbs

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

Installation, 92 ft. lbs., step 2: then remove bolt, install new bolt., step 3: 92 ft. lbs., step 4: 130 degrees.

92 ft. lbs

Cylinder Head — tightening sequence 1 stages

M11 bolts

22 ft. lbs

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

15 ft. lbs, Step 2: 15 ft. lbs., Step 3: 15

15 ft. lbs

Intake Manifold to Engine Bolts — tightening sequence 1 stages

3.7 ft. lbs., Step 2: 7.4

3.7 ft. lbs

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

11 ft. lbs., Step 2: 15

11 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the 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 25,000 mi	Exhaust System (Complete) (inspect) · Fuel System (inspect)
Every 50,000 mi	Engine Air Filter Element (replace) · Transfer Case Assembly (drain & refill)
Every 100,000 mi	Spark Plug Wires (inspect) · Spark Plugs (replace) · Transmission Fluid & Filter (replace)
At 150,000 mi	Accessory 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 2008 GMC Truck Envoy 2WD lead in one area — the exterior lighting, 14 of 77 reports (18%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 5 of the reports describe a crash and 4 a fire — a small share of the total, but worth weighing against the exterior lighting 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.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

5 involved a crash · 4 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’95 ’96 ’97 ’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05 ’06 ’07’08’09

Owner complaints filed with NHTSA, by component

All 77 complaints on record, top 8 components.

Exterior Lighting14

Electrical System10

Seat Belts5

Air Bags4

Unknown Or Other4

Suspension4

Engine & Engine Cooling4

Engine4

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 Envoy 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.

Group 78 battery Vehicles taking 7 qt Engine oil filter 12731179 Engine air filter 19239713 Spark plug 12681663 Front wiper blades 15214346

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2008 Envoy 2WD take?

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

Does the 2008 Envoy 2WD have open recalls?

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