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.
MODEL IDENTIFICATION
Vehicle model is identified by fifth character of Vehicle Identification Number (VIN). VIN is stamped on metal pad on top of left end of instrument panel, near windshield. See MODEL IDENTIFICATION table.
| Series (1) | Model |
|---|
| "C" | Sierra & Suburban |
| "G" | RWD Van |
| "K" | 4WD Blazer, Pickup, Sierra, Suburban & Yukon |
| "P" | Commercial Van/Van |
| (1) Vehicle series is fifth character of VIN. |
| (1) | Vehicle series is fifth character of VIN. |
CAPACITIES
| Application | Cold Crank Amps @ 0°F (-18°C) | Reserve Capacity Minutes |
|---|
| 6.5L (VIN P, S & Y) (1) | 570 | 90 |
| (1) Two batteries per vehicle. |
| (1) | Two batteries per vehicle. |
| Application | (1) Quantity - Qts. (L) |
|---|
| Crankcase | (2) 7.0 (6.6) |
| Cooling System (Includes Heater) (3) | 27.0 (26.0) |
| Automatic Transmission (Dexron-II) (4) |
| Manual Transmission | 5.0 (4.7) |
| 4-Speed | (5) 4.0 (3.8) |
| 5-Speed | (6) 2.2 (2.0) |
| (1) Fluid capacities listed are approximate. Always fill to FULL mark. (2) Use of synthetic 10W-30 motor oil is required on Turbo models. (3) Add 3 qts. (2.8L) coolant for models equipped with rear heater. (4) Drain and refill capacity only. Does not include torque converter. (5) GL-4. (6) Manual Transmission Fluid (T2850). |
| (1) | Fluid capacities listed are approximate. Always fill to FULL mark. |
| (2) | Use of synthetic 10W-30 motor oil is required on Turbo models. |
| (3) | Add 3 qts. (2.8L) coolant for models equipped with rear heater. |
| (4) | Drain and refill capacity only. Does not include torque converter. |
| (6) | Manual Transmission Fluid (T2850). |
SERVICE INTERVALS & SPECIFICATIONS
| Component | Interval (Miles) |
|---|
| Air Filter | 30,000 |
| Coolant | 30,000 |
| Fuel Filter | (1) 60,000 |
| Oil & Filter | (2) (3) 7500 |
| Spark Plugs | 30,000 |
| (1) On diesel engines, replace every 30,000 miles. (2) On diesel engines, replace every 5000 miles. (3) On turbo models, replace every 3000 miles. |
| (1) | On diesel engines, replace every 30,000 miles. |
| (2) | On diesel engines, replace every 5000 miles. |
| (3) | On turbo models, replace every 3000 miles. |
BELT TENSION
| Application | Tension - Lbs. (kg) |
|---|
| All Models | (1) |
| (1) Serpentine belt tension is maintained automatically by a spring-tensioned idler pulley. No adjustment is necessary. |
| (1) | Serpentine belt tension is maintained automatically by a spring-tensioned idler pulley. No adjustment is necessary. |
ENGINE COMPRESSION
| Application | Compression Ratio |
|---|
| 6.5L Diesel | 21.3:1 |
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Note. All models are equipped with hydraulic lifters. No adjustments are required.
IGNITION COIL
| Application | Ohms |
|---|
| All Models | 500-1500 |
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| All Models | 30,000 Maximum |
HIGH TENSION WIRE RESISTANCE
FIRING ORDER & TIMING MARKS
Note. For firing order and timing marks, see appropriate illustration. (Scheme 3)
Firing Order (6.5L Diesel). Scheme 3
Scheme 3: Firing Order (6.5L Diesel)
IGNITION TIMING
FUEL PUMP
| Application | Psi (kg/cm 2 ) |
|---|
| 6.5L Diesel | 5.8-8.7 (.4-.6) |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| 6.5L | 1.3 |
| (1) Injector resistance specification is at 140°F (60°C). |
| (1) | Injector resistance specification is at 140°F (60°C). |
INJECTOR RESISTANCE SPECIFICATIONS (1)
MINIMUM IDLE SPEED
Note. For minimum idle speed adjustment procedures, see IDLE SPEED in ADJUSTMENTS - 6.5L DIESEL article in the ENGINE PERFORMANCE section.
THROTTLE POSITION (TP) SENSOR
Note. TP sensor has been replaced by a non-adjustable Accelerator Pedal Position (APP) module. APP signals PCM which signals fuel solenoid driver and fuel injector control. Throttle control is thus electronic with NO mechanical link from engine to pedal.
