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1999 GMC Truck C-Series Sierra

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1999 C-Series Sierra.

The 1999 GMC Truck C-Series Sierra takes 4.5 qt of 5W-30 engine oil.

Model year20001999

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 torque140 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 25160561. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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 sizeLT245-75R16EOEM · verified
Wheel / rim6.5-J inOEM · verified

OE service part numbers OEM · verified

Engine oil filter25160561 alt 25013454
Engine air filter25168081 alt 25168082
Fuel filter25171792 discontinued
Spark plug12681665
Front wiper blades93441742
Serpentine belt12576454 alt 19355374
Thermostat12632948 alt 12551507
Cabin air filter19257782 alt 12489479

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, 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 140 ft-lbs. The firing order is 1-8-4-3-6-5-7-2. 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

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity8.5 qt
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity6.3 qt
Engine CoolantDEX-COOL OR EQUIVALENT
Engine Oil5W-30 · API
Engine Oil Capacity4.5 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts74 ft-lbs
Crankshaft Pulley and/or Damper Bolts110 ft-lbs
Cylinder Head StepsApply sealant GM P/N 12346004
Cylinder Head StepsApply the thread sealant GM P/N 12346004
Cylinder Head StepsApply sealer GM P/N 12346004
Exhaust Manifold to Cylinder Head Bolts40 ft-lbs
Intake Manifold to Engine Bolts11.0 ft-lbs
Exhaust Manifold to Cylinder Head Bolts22.0 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)110.0 ft-lbs
Leaf Spring to Chassis Bracket110.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket70.0 ft-lbs
Lug Nuts140 ft-lbs
Front Wheel Hub177 ft-lbs

Ignition

Cylinder Firing Order1-6-5-4-3-2
Cylinder Firing Order1-8-7-2-6-5-4-3
Cylinder Firing Order1-8-4-3-6-5-7-2
Cylinder Firing Order1-8-7-2-6-5-4-3
Cylinder Firing Order1-8-4-3-6-5-7-2
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.060 in
Spark Plug Torque11-14 ft-lbs

Battery & A/C

RefrigerantR134a
Oil GroupPAG
Oil Type46
Standard BCI Group Number78
Standard BCI Cranking Performance600 cca
Optional BCI Group Number78
Optional BCI Cranking Performance690 cca
Standard BCI Group Number78

Service checks

Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Fuel Pump Pressure Minimum66.0 psi
Key ON Engine OFF (KOEO)60-66
RPM50-63 @ Idle rpm
Fuel Pump Pressure Minimum66.0 psi
Key ON Engine OFF (KOEO)60-66

Brakes

Torque Caliper to Bracket15 ft-lbs
Torque to Knuckle38 ft-lbs
Torque Caliper to Bracket15 ft-lbs
Torque to Knuckle38 ft-lbs
Brake ApplicationWITH RPO JC5 / WITH RPO JC6
Torque Caliper to Bracket80 ft-lbs / 31 ft-lbs
Torque to Knuckle129 ft-lbs / 221 ft-lbs
Torque Caliper to Bracket80 ft-lbs

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 4 stages
1all bolts22 ft. lbs
2long bolts75 degrees
3medium bolts65 degrees
455
Cylinder Head — tightening sequence 5 stages
1M11 bolts22 ft. lbs
2M11 bolts-90 degrees90 degrees
3M11 bolts 1-890 degrees
4M11 bolts 9 and 1050 degrees
522
Cylinder Head — tightening sequence 5 stages
1M11 bolts22 ft. lbs
2M11 bolts-90 degrees90 degrees
3M11 bolts 1-890 degrees
4M11 bolts 9 and 1050 degrees
522
Cylinder Head — tightening sequence 2 stages
1all bolts22 ft. lbs
2long bolts75 degrees
Cylinder Head — tightening sequence 2 stages
122 ft. lbs.22 ft. lbs
2long bolts75 degrees
Cylinder Head — tightening sequence 4 stages
120 ft. lbs.20 ft. lbs
255 ft. lbs.55 ft. lbs
355 ft. lbs.55 ft. lbs
490
Cylinder Head — tightening sequence 2 stages
137 ft. lbs.37 ft. lbs
2bolts 1, 2, 3, 6, 8, 9, 12, 13, 14, 15, 16150 degrees
Cylinder Head — tightening sequence 1 stages
1all bolts22 ft. lbs
Cylinder Head — tightening sequence 1 stages
1M11 bolts22 ft. lbs
Cylinder Head — tightening sequence 1 stages
1M11 bolts22 ft. lbs
Cylinder Head — tightening sequence 1 stages
122 ft. lbs. Step 2: long bolts: 75 degrees medium bolts: 65 degrees short bolts: 5522 ft. lbs
Cylinder Head — tightening sequence 1 stages
120 ft. lbs. Step 2: 55 ft. lbs. Step 3: 55 ft. lbs. Step 4: 9020 ft. lbs
Cylinder Head — tightening sequence 1 stages
137 ft. lbs. Step 2: bolts 1, 2, 3, 6, 8, 9, 12, 13, 14, 15, 16: turn 150 degrees bolts 4, 5, 10, 11: turn 9037 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
122 ft. lbs., step 2: 3022 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
122.0
Intake Manifold to Engine Bolts — tightening sequence 1 stages
140.0
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
122.0
Intake Manifold to Engine Bolts — tightening sequence 1 stages
130.0

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.

Every 3,000 miKing Pin (lubricate)
Every 5,000 miBrake Hydraulic System (inspect fluid level) · Steering Linkage (lubricate) · Steering System (inspect)
At 7,500 miDrive Axle Assembly (drain & refill)
Every 7,500 miCV Joint Boot (inspect) · Differential (inspect fluid level) · Driveshaft Slip Yoke (lubricate) · Driveshaft U-Joint (lubricate) · Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 10,000 miAir Intake System (inspect)
Every 12,000 miUnderbody Splash Shield (inspect)
Every 15,000 miCabin Air Filter (replace)
Every 30,000 miClutch Cross Shaft (lubricate) · Clutch Release Lever Pivot Points (lubricate) · Drive Axle Assembly (drain & refill) · Engine Air Filter Element (replace) · Fuel Filter (replace) · Wheel Bearing (inspect)
Every 60,000 miAccessory Drive Belt (inspect) · Crankcase Depression Regulator Valve (inspect) · EGR System (inspect) · Exhaust Pressure Regulator (inspect) · Fuel Evaporative Emission Control System (inspect) · Fuel Line (inspect)

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 C-Series Sierra. 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 batteryVehicles taking 4.5 qtEngine oil filter 25160561Engine air filter 25168081Fuel filter 25171792Spark plug 12681665

Reference guides

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

OBD-II trouble codesTorque specificationsMaintenance schedulesFluid capacities & specs

Frequently asked

How much oil does the 1999 C-Series Sierra take?

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