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 | 4.5 (4.3) |
| (1) Fluid capacities listed are approximate. Always fill to FULL mark. (2) Includes oil filter. |
| (1) | Fluid capacities listed are approximate. Always fill to FULL mark. |
FLUID CAPACITY (CRANKCASE) (1)
| Application | (2) Quantity Qts. (L) |
|---|
| Astro & Safari |
| Automatic Transmission | 16.5 (15.6) |
| Manual Transmission | 13.5 (12.8) |
| Blazer, Jimmy Canadian & Sonoma |
| Automatic Transmission | 11.7 (11.1) |
| Manual Transmission | 11.9 (11.3) |
| Chevy Express & Savana | 12.6 (11.9) |
| Sierra & Silverado |
| Automatic Transmission | 12.6 (11.9) |
| Manual Transmission | 12.9 (12.2) |
| S10 Pickup |
| Automatic Transmission | 13.8 (13.1) |
| Manual Transmission | 14.0 (13.3) |
| (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) |
|---|
| Astro & Safari | 5.0 (4.7) |
| Blazer, Jimmy Canadian, Sonoma & S10 Pickup | 5.0 (4.7) |
| Chevy Express & Savana |
| 4L60-E | 5.0 (4.7) |
| 4L80-E | 7.7 (7.3) |
| Sierra & Silverado |
| 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, unless specified otherwise. |
| (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, unless specified otherwise. |
FLUID CAPACITY (AUTOMATIC TRANSMISSION) (1)
| Application | Quantity Pts. (L) |
|---|
| Blazer, Jimmy Canadian, Sonoma & S10 Pickup | (2) 4.2 (2.0) |
| Sierra & Silverado |
| NV3500 | (2) 4.2 (2.0) |
| 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 Synthetic Lubricant (GM 12346190). (4) TranSynd™ 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 Synthetic Lubricant (GM 12346190). |
| (4) | TranSynd™ Synthetic ATF (GM 12378515). |
FLUID CAPACITY (MANUAL TRANSMISSION) (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 Fluid & Filter | (2) |
| Engine Coolant | 150,000 |
| Fuel Filter | 30,000 |
| Oil & Oil Filter | (3) |
| PCV Valve | (1) 100,000 |
| Spark Plugs | 100,000 |
| (1) Inspect and replace as necessary. (2) If used under severe conditions, replace every 15,000 miles. (3) If used under severe conditions, replace every 3000 miles or 3 months, whichever comes first. If used under normal conditions, replace every 7500 miles or 12 months, whichever comes first. |
| (1) | Inspect and replace as necessary. |
| (2) | If used under severe conditions, replace every 15,000 miles. |
| (3) | If used under severe conditions, replace every 3000 miles or 3 months, whichever comes first. If used under normal conditions, replace every 7500 miles or 12 months, whichever comes first. |
REPLACEMENT INTERVALS (ASTRO & SAFARI)
| Component | Interval (Miles) |
|---|
| Accessory Drive Belt | (1) 60,000 |
| Air Filter | 30,000 |
| Automatic Transfer Case Fluid | 50,000 |
| Automatic Transmission Fluid & Filter | (2) |
| Engine Coolant | (3) |
| Fuel Filter | 30,000 |
| Oil & Oil Filter | (4) |
| Spark Plugs | 100,000 |
| (1) Inspect and replace as necessary. (2) If used under severe conditions, replace every 15,000 miles. (3) Replace every 150,000 miles or 60 months, whichever comes first. (4) Replace every 7500 miles or 12 months, whichever comes first. |
| (1) | Inspect and replace as necessary. |
| (2) | If used under severe conditions, replace every 15,000 miles. |
| (3) | Replace every 150,000 miles or 60 months, whichever comes first. |
| (4) | Replace every 7500 miles or 12 months, whichever comes first. |
REPLACEMENT INTERVALS (BLAZER, JIMMY CANADIAN, SONOMA & S10 PICKUP)
| Component | Interval (Miles) |
|---|
| Accessory Drive Belt | (1) 60,000 |
| Air Filter | 30,000 |
| Automatic Transmission Fluid & Filter | (2) |
| Engine Coolant | 150,000 |
| Fuel Filter | 30,000 |
| Oil & Oil Filter | (3) |
| Spark Plugs | 100,000 |
| (1) Inspect and replace as necessary. (2) If GVWR is greater than 8600 lbs (3900 kg) or is used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles (3) If used under severe conditions, replace every 3000 miles or 3 months, whichever comes first. If used under normal conditions, replace every 7500 miles or 12 months, whichever comes first. |
| (1) | Inspect and replace as necessary. |
| (2) | If GVWR is greater than 8600 lbs (3900 kg) or is used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles |
| (3) | If used under severe conditions, replace every 3000 miles or 3 months, whichever comes first. If used under normal conditions, replace every 7500 miles or 12 months, whichever comes first. |
REPLACEMENT INTERVALS (CHEVY EXPRESS & SAVANA)
| Component | Interval (Miles) |
|---|
| Accessory Drive Belt | (1) 60,000 |
| Air Filter | 30,000 |
| Automatic Transfer Case Fluid | 50,000 |
| Automatic Transmission Fluid & Filter | (2) |
| Engine Coolant | 150,000 |
| Fuel Filter | 30,000 |
| Manual Transmission Fluid | 150,000 |
| Oil & Oil Filter | (3) |
| PCV | (1) 100,000 |
| Spark Plugs | 100,000 |
| (1) Inspect and replace as necessary. (2) If GVWR is greater than 8600 lbs (3900 kg) or is used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles. (3) 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) | If GVWR is greater than 8600 lbs (3900 kg) or is used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles. |
| (3) | 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. |
REPLACEMENT INTERVALS (SIERRA & SILVERADO)
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
Engine is 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 | AC | R41-932 |
| Application | Gap - In. (mm) | Torque - Ft. Lbs. (N.m) |
|---|
| All Models | .060 (1.52) | 11 (15) |
SPARK PLUG SPECIFICATIONS
Scheme 1
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 further testing procedures, perform TP sensor related diagnostic test. See appropriate SELF-DIAGNOSTICS article.
| Application | (1) Voltage |
|---|
| All Models | 1.0-4.0 |
| (1) Voltage range is from idle to wide open throttle. |
| (1) | Voltage range is from idle to wide open throttle. |
THROTTLE POSITION SENSOR VOLTAGE
