INTRODUCTION
Use this article to quickly find specifications related to servicing and on-vehicle adjustments. This article may be used for quick reference when you are familiar with proper adjustment procedures and only need a specification.
CAPACITIES
| Application | (2) Quantity Qts. (L) |
|---|
| All Models | 6.5 (6.2) |
| (1) Fluid capacities listed are approximate. Always fill to FULL mark. (2) Includes oil filter capacity. |
| (1) | Fluid capacities listed are approximate. Always fill to FULL mark. |
| (2) | Includes oil filter capacity. |
FLUID CAPACITY (CRANKCASE) (1)
| Application | (2) Quantity Qts. (L) |
|---|
| Avalanche, Suburban & Yukon XL | 14.4 (13.7) |
| Sierra & Silverado |
| A/T | 20.7 (19.6) |
| M/T | 21.1 (20.0) |
| (1) Fluid capacities listed are approximate. Always fill to FULL mark. (2) Includes heater. |
| (1) | Fluid capacities listed are approximate. Always fill to FULL mark. |
FLUID CAPACITY (COOLING SYSTEM) (1)
| Application | (2) Quantity Qts. (L) |
|---|
| Allison | 7.4 (7.0) |
| 4L60-E | 5.0 (4.7) |
| 4L80-E | 7.7 (7.3) |
| (1) Fluid capacities listed are approximate. Always fill to FULL mark with Dexron-III, unless specified otherwise. (2) Drain and refill capacity only. Does not include torque converter. |
| (1) | Fluid capacities listed are approximate. Always fill to FULL mark with Dexron-III, unless specified otherwise. |
| (2) | Drain and refill capacity only. Does not include torque converter. |
FLUID CAPACITY (AUTOMATIC TRANSMISSION) (1)
| Application | Quantity Pts. (L) |
|---|
| Sierra & Silverado |
| NV3500 | (2) 4.8 (2.3) |
| NV4500 | (3) 8.0 (3.8) |
| ZF S6-650 | (4) 12.6 (6.0) |
| (1) Fluid capacities listed are approximate. Always fill to FULL mark. (2) Synchromesh Transmission Fluid (GM 12345349). (3) SAE 75W-85 GL4 gear oil or Synthetic Lubricant (GM 12346190). (4) TranSynd(tm) Synthetic ATF (GM 12378515). |
| (1) | Fluid capacities listed are approximate. Always fill to FULL mark. |
| (2) | Synchromesh Transmission Fluid (GM 12345349). |
| (3) | SAE 75W-85 GL4 gear oil or Synthetic Lubricant (GM 12346190). |
| (4) | TranSynd(tm) Synthetic ATF (GM 12378515). |
FLUID CAPACITY (MANUAL TRANSMISSION) (1)
| Application | Quantity Qts. (L) |
|---|
| Avalanche, Suburban & Yukon XL |
| Borg Warner 4481 | (2) 1.5 (1.4) |
| Borg Warner 4482 | (2) 1.5 (1.4) |
| New Venture 149 | (2) 2.2 (2.1) |
| New Venture 246 | (3) 2.0 (1.9) |
| Sierra & Silverado |
| New Venture 149 | (2) 2.2 (2.1) |
| New Venture 246 | (3) 2.0 (1.9) |
| New Venture 261 | (2) 2.0 (1.9) |
| New Venture 263 | (2) 2.0 (1.9) |
| (1) Fluid capacities listed are approximate. Always fill to FULL mark. (2) Dexron-III. (3) AUTO-TRAK II Fluid (GM 12378508). |
| (1) | Fluid capacities listed are approximate. Always fill to FULL mark. |
| (3) | AUTO-TRAK II Fluid (GM 12378508). |
FLUID CAPACITY (TRANSFER CASE) (1)
SERVICE INTERVALS & SPECIFICATIONS
| Component | Interval (Miles) |
|---|
| Accessory Drive Belt | (1) 60,000 |
| Air Filter | 30,000 |
| Automatic Transfer Case Fluid | 50,000 |
| Automatic Transmission External Control Main Filter (Allison) | 7500 |
| Automatic Transmission Fluid & Filter | (2) Or (3) |
| Engine Coolant | 150,000 |
| Fuel Filter | 30,000 |
| Manual Transmission Fluid (Sierra & Silverado Only) | 150,000 |
| Oil & Oil Filter | (4) |
| PCV | 100,000 |
| Spark Plugs | 100,000 |
| (1) Inspect and replace as necessary. (2) On Allison transmissions, if used under severe conditions, replace every 25,000 miles. (3) On all other transmissions, if vehicle's GVWR is greater than 8600 lbs (3900 kg) or if used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles. (4) If used under severe conditions, replace every 3000 miles. If used under normal conditions, replace as indicated by CHANGE OIL SOON light or every 12 months, whichever comes first. |
| (1) | Inspect and replace as necessary. |
| (2) | On Allison transmissions, if used under severe conditions, replace every 25,000 miles. |
| (3) | On all other transmissions, if vehicle's GVWR is greater than 8600 lbs (3900 kg) or if used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles. |
| (4) | If used under severe conditions, replace every 3000 miles. If used under normal conditions, replace as indicated by CHANGE OIL SOON light or every 12 months, whichever comes first. |
BELT TENSION
Adjustment of serpentine belt is not necessary. Belt tension is maintained by spring-tensioned idler pulley (some equipped with belt wear indicator).
ENGINE COMPRESSION
| Application | Specification - psi (kPa) |
|---|
| Normal Compression Pressure | (1) |
| Minimum Compression Pressure | (1) |
| Compression Variance | (2) |
| (1) Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (689.5 kPa). (2) Information is not available from manufacturer. |
| (1) | Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (689.5 kPa). |
| (2) | Information is not available from manufacturer. |
ENGINE COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Engines are equipped with hydraulic lifters. Adjustment is not required.
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| All Models | 1000 Per Ft. |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
| Application | Type | Part No. |
|---|
| All Models | Denso | TJ14R-P15 |
| Application | Gap - In. (mm) | Torque - Ft. Lbs. (N.m) |
|---|
| All Models | .060 (1.52) | 15 (20) |
SPARK PLUG SPECIFICATIONS
Scheme 2
IGNITION TIMING
All models are equipped with an electronic computer-controlled ignition system. Ignition timing is not adjustable.
FUEL PUMP
| Application | Psi (kPa) |
|---|
| All Models | 55-62 (379.2-427.5) |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| All Models | 11-14 |
| (1) Injector resistance specification is at 50-95°F (10-35°C). |
| (1) | Injector resistance specification is at 50-95°F (10-35°C). |
INJECTOR RESISTANCE SPECIFICATIONS (1)
IDLE SPEED & MIXTURE
Note. Idle mixture is controlled by Powertrain Control Module (PCM). Idle speed is preset by manufacturer and is not adjustable.
THROTTLE POSITION SENSOR
Note. Throttle Position (TP) sensor is not adjustable. For testing procedures, perform TP sensor related diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 8.1L AVALANCHE, SIERRA, SILVERADO, SUBURBAN & YUKON XL article.
Note. Engine is also equipped with non-adjustable Accelerator Pedal Position (APP) sensor, mounted near the accelerator pedal. For testing procedures, perform APP sensor related diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 8.1L AVALANCHE, SIERRA, SILVERADO, SUBURBAN & YUKON XL article.
