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2002 GMC Truck Envoy 2WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2002 Envoy 2WD.

The 2002 GMC Truck Envoy 2WD requires specific maintenance such as its 7-quart engine oil capacity filled with 5W-30 API viscosity fluid, yet its operational record reveals a vehicle burdened by notable reliability concerns. Owners logged 575 total complaints predominantly focused on the Power Train, a figure further underscored by 14 separate recalls. When contextualized within the model's 1995-2009 lifespan, this year sits just beneath the all-time high of 640 complaints set in 2003, meaning the 2002 Envoy occupies a particularly problematic chapter in the vehicle's history rather than representing a period of dependable performance.

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. Note the factory fuel filter and spark plug are now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. 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, TRAILBLAZER LS 4WD P245-70R16;BLAZER P235-75R15OEM · verified

Wheel / rim7-J, 7-J, 7-J inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	12731179
Engine air filter	19239713
Fuel filter	19368932 discontinued
Spark plug	25334145 discontinued
Battery	88866306 alt 88866305
Front wiper blades	15214346
Serpentine belt	12593774
Thermostat	12561155 alt 12620112

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, 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 1-5-3-6-2-4. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Differential Gear Oil	75W-90 · GL-5
Differential Gear Oil Capacity	4.0 qt
Engine Oil	5W-30 · API
Engine Oil Capacity	7 qt

Engine torques

Intake Manifold to Engine Bolts	7.4 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
Front Wheel Hub	103 ft-lbs

Ignition

Cylinder Firing Order	1-5-3-6-2-4
Cylinder Firing Order	1-5-3-6-2-4
Spark Plug Manufacturer	AC Delco
Spark Plug Type	AC 41-981
Spark Plug Gap	0.050 in
Spark Plug Torque	13.0 ft-lbs

Battery & A/C

Refrigerant	R134a
Oil Group	PAG
Oil Type	46
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
Fuel Pump Pressure Minimum	48.0 psi
Fuel Pump Pressure Maximum	54.0 psi

Brakes

Brake Application	WITH FOUR WHEEL DISC / WITH STANDARD
Torque to Knuckle	77 ft-lbs / 52 ft-lbs / 38 ft-lbs
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 specification
Brake Application	WITH FOUR WHEEL DISC / WITH STANDARD
Rotor Max Parallel Variation	0.0003 in / 0.0005 in
Rotor Runout Limit	0.003 in / 0.004 in
Rotor Nominal Thickness From	1.14 in / 0.787 in / 1.03 in
Rotor Nominal Thickness To	1.14 in / 0.787 in / 1.03 in

Multi-step torque procedures OEM · verified

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

110 ft. lbs., step 2: 180

110 ft. lbs

Cylinder Head — tightening sequence 2 stages

Prep bolts 1-14:

1	22 ft. lbs.	22 ft. lbs
2	155 degrees; bolt 15:	155 degrees
1	62 in. lbs.	62 in
2	120 degrees; bolts 16-17:	120 degrees
1	62 in. lbs.	62 in
2	60

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 7,500 mi	Axle Shaft Oil Seal (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Tire & Wheel Assembly (rotate)
Every 30,000 mi	Engine Air Filter Element (replace) · Fuel Filter (replace)
Every 50,000 mi	Transfer Case Assembly (drain & refill)
Every 60,000 mi	Accessory Drive Belt (inspect)
Every 100,000 mi	Spark Plugs (replace) · Transmission Fluid & Filter (replace)
At 150,000 mi	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 2002 GMC Truck Envoy 2WD top in one area — the power train, 69 of 575 reports (12%), well ahead of the next concern. That matters, because the power train are also the target of recall 01V-334 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 45 of the reports describe a crash and 15 a fire — a small share of the total, but worth weighing against the power train 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

575

Owner complaints

45 involved a crash · 15 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 575 complaints on record, top 8 components.

Power Train69

Engine & Engine Cooling68

Electrical System47

Fuel System, Gasoline39

Visibility38

Air Bags32

Suspension25

Exterior Lighting22

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 14 campaigns on record for this vehicle.

01V334000Power Train:Transfer Case (4-Wheel Drive)Reported 17/10/2001

VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES EQUIPPED WITH 4-WHEEL DRIVE. THE CALIBRATION OF THE TRANSFER CASE CONTROL MODULE COULD CAUSE INSUFFICIENT HIGH SPEED GEAR ENGAGEMENT. Remedy: DEALERS WILL UPDATE THE TRANSFER CASE CONTROL MODULE CALIBRATION TO INCREASE GEAR ENGAGEMENT. OWNER NOTIFICATION BEGAN NOVEMBER 6, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN…

07E014000Exterior Lighting:HeadlightsReported 26/02/2007

CERTAIN MAXZONE HEADLIGHT ASSEMBLIES, DEPO BRAND, P/NO 335-1120L-AS, SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR THE ABOVE LISTED PASSENGER VEHICLES. DURING PRODUCTION THE LAMP HOUSING SHAPE DEFORMED DISTORTING THE… Remedy: MAXZONE WILL NOTIFY OWNERS AND OFFER REIMBURSEMENT FOR ANY NONCOMPLIANT HEADLIGHTS. THE RECALL BEGAN ON FEBRUARY 16, 2007. OWNERS MAY CONTACT MAXZONE AT 909-822-3288.