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 |
|---|---|
| "A" | 2WD Aztek & Rendezvous |
| "B" | AWD Aztek & Rendezvous |
| "C" | 2WD Avalanche, Cab & Chassis, Escalade, Sierra, Silverado, Suburban, Tahoe & Yukon XL |
| "E" | 2WD Tracker |
| "G" | Cutaway, Express, RV Cutaway & Savana |
| "J" | 4WD Tracker |
| "K" | 4WD Avalanche, Cab & Chassis, Escalade, Escalade EXT, Sierra, Silverado, Suburban, Tahoe, Yukon & Yukon XL |
| "L" | AWD Astro & Safari |
| "M" | 2WD Astro & Safari |
| "S" | 2WD Blazer, Bravada, Envoy, Jimmy Canadian, Sonoma, S10 Pickup & TrailBlazer |
| "T" | AWD/4WD Blazer, Bravada, Envoy XL, Jimmy Canadian, Sonoma, S10 Pickup & TrailBlazer |
| "U" | Montana, Silhouette & Venture |
| "Z" | (2) VUE |
| (1) Vehicle series is fifth character of VIN. (2) 2WD and AWD models. | |
| (1) | Vehicle series is fifth character of VIN. |
| (2) | 2WD and AWD models. |
MODEL IDENTIFICATION
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.
ENGINE OIL CAPACITY
| Application | (2) Quantity Qts. (L) | |
|---|---|---|
| 2.0L | 5.5 (5.2) | |
| 2.2L | ||
| Sonoma & S10 Pickup | 4.5 (4.3) | |
| VUE | 5.0 (4.7) | |
| 2.5L | 5.8 (5.5) | |
| 3.0L | 5.0 (4.7) | |
| 3.4L & 4.3L | 4.5 (4.3) | |
| 4.2L | 7.0 (6.6) | |
| 4.8L, 5.3L & 6.0L | 6.0 (5.7) | |
| 5.0L & 5.7L | 5.0 (4.7) | |
| 6.5L | 8.0 (7.6) | |
| 6.6L | 10.1 (9.6) | |
| 8.1L | ||
| Except Cab & Chassis | 6.5 (6.1) | |
| Cab & Chassis | 6.6 (6.3) | |
| (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)
COOLING SYSTEM FLUID CAPACITY
| Application | (2) Quantity Qts. (L) | |||
|---|---|---|---|---|
| 2.0L | 6.9 (6.5) | |||
| 2.2L | ||||
| Automatic Transmission | ||||
| "S" & "T" Series | 9.7 (9.2) | |||
| "Z" Series | 7.3 (6.9) | |||
| Manual Transmission | ||||
| "S" & "T" Series | 9.9 (9.4) | |||
| "Z" Series | 7.4 (7.0) | |||
| 2.5L | 8.5 (8.0) | |||
| 3.0L | 7.8 (7.4) | |||
| 3.4L | ||||
| "A" & "B" Series | 9.6 (9.1) | |||
| "U" Series | ||||
| Standard | ||||
| With Front A/C Only | 9.6 (9.1) | |||
| With Front & Rear A/C | 11.9 (11.3) | |||
| Heavy-Duty | ||||
| With Front A/C Only | 10.5 (10.1) | |||
| With Front & Rear A/C | 13.2 (12.6) | |||
| 4.2L | 13.9 (13.1) | |||
| 4.3L | ||||
| "C" & "K" Series | ||||
| Automatic Transmission | 12.6 (11.9) | |||
| Manual Transmission | 12.9 (12.2) | |||
| "G" Series | ||||
| With Rear Heater | 14.0 (13.2) | |||
| Without Rear Heater | 11.0 (10.4) | |||
| "L" & "M" Series | ||||
| With Rear Heater | 16.5 (15.6) | |||
| Without Rear Heater | 13.5 (12.8) | |||
| "S" & "T" Series | ||||
| Pickup | ||||
| Automatic Transmission | 13.8 (13.1) | |||
| Manual Transmission | 14.0 (13.3) | |||
| Utility | ||||
| Automatic Transmission | 11.7 (11.1) | |||
| Manual Transmission | 11.9 (11.3) | |||
| 4.8L | ||||
| Automatic Transmission | ||||
| With Front A/C | 14.4 (13.7) | |||
| With Front & Rear A/C | 15.8 (15.0) | |||
| Without A/C | 13.4 (12.7) | |||
| Manual Transmission | 13.7 (13.0) | |||
| 5.0L | ||||
| With Rear Heater | 20.0 (18.9) | |||
| Without Rear Heater | 17.0 (16.0) | |||
| 5.3L | ||||
| With Front A/C Only | 14.4 (13.7) | |||
| With Front & Rear A/C | 15.8 (15.0) | |||
| With Optional A/C | ||||
| Except Sierra & Silverado | 14.4 (13.7) | |||
| Sierra & Silverado | 14.9 (14.1) | |||
| Without A/C | ||||
| Except Sierra & Silverado | 14.4 (13.7) | |||
| Sierra & Silverado | 13.4 (12.7) | |||
| 5.7L | ||||
| "C" & "K" Series | ||||
| Standard | ||||
| With A/C | 20.0 (18.9) | |||
| Without A/C | 17.5 (16.6) | |||
| Heavy-Duty | ||||
| With A/C | 27.0 (25.5) | |||
| Without A/C | 26.5 (25.0) | |||
| "G" Series | ||||
| With Rear Heater | 20.0 (18.9) | |||
| Without Rear Heater | ||||
| CNG Engine | 17.5 (16.6) | |||
| Gasoline Engine | 17.0 (16.0) | |||
| 6.0L | ||||
| Automatic Transmission | ||||
| With Optional Oil Cooler | 14.4 (13.7) | |||
| Without Optional Oil Cooler | 14.8 (14.0) | |||
| Manual Transmission | ||||
| With Optional Oil Cooler | 14.8 (14.0) | |||
| Without Optional Oil Cooler | 15.2 (14.4) | |||
| 6.5L | ||||
| "C" Series | ||||
| With Rear Heater | 27.5 (26.0) | |||
| Without Rear Heater | 23.5 (22.2) | |||
| "G" Series | ||||
| With Rear Heater | 27.5 (26.0) | |||
| Without Rear Heater | 23.5 (22.2) | |||
| 6.6L | ||||
| Automatic Transmission | 20.3 (19.2) | |||
| Manual Transmission | 20.7 (19.6) | |||
| 8.1L | ||||
| "C" & "K" Series | ||||
| Automatic Transmission | ||||
| Except Cab & Chassis | 20.7 (19.6) | |||
| Cab & Chassis | 28.5 (27.0) | |||
| Manual Transmission | ||||
| Except Cab & Chassis, Sierra & Silverado | 20.7 (19.6) | |||
| Cab & Chassis | 28.5 (27.0) | |||
| Sierra & Silverado | 21.1 (20.0) | |||
| "G" Series | ||||
| With Rear Heater | 26.0 (24.6) | |||
| Without Rear Heater | 23.0 (21.8) | |||
| (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. |
| (2) | Includes heater. |
FLUID CAPACITY (COOLING SYSTEM) (1)
AUTOMATIC TRANSMISSION FLUID CAPACITY
| Application | (2) Quantity Qts. (L) | |
|---|---|---|
| "A" & "B" Series (4T65-E) | ||
| AWD | 7.8 (7.4) | |
| 2WD | 7.4 (7.0) | |
| "C" & "K" Series | ||
| Allison LCT 1000 | 7.4 (7.0) | |
| 4L60-E | 5.0 (4.7) | |
| 4L80-E | 7.7 (7.3) | |
| "E" Series (AW03-72LE) | 3.0 (2.8) | |
| "G" Series | ||
| 4L60-E | 5.0 (4.7) | |
| 4L80-E | 7.7 (7.3) | |
| "J" Series (AW03-72LE) | 2.6 (2.5) | |
| "L" & "M" Series (4L60-E) | 5.0 (4.7) | |
| "S" & "T" Series (4L60-E) | 5.0 (4.7) | |
| "U" Series (4T65-E) | 7.4 (7.0) | |
| "Z" Series | ||
| AF33-5 | (3) 4.2 (4.0) | |
| VT25-E | (4) 7.0 (6.5) | |
| (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. (3) Use Saturn Transaxle Fluid (P/N 22689186) only. (4) Use Saturn Transaxle Fluid (P/N 22688912) only. | ||
| (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. |
| (3) | Use Saturn Transaxle Fluid (P/N 22689186) only. |
| (4) | Use Saturn Transaxle Fluid (P/N 22688912) only. |
FLUID CAPACITY (AUTOMATIC TRANSMISSION) (1)
MANUAL TRANSMISSION FLUID CAPACITY
| Application | Quantity Pts. (L) | |
|---|---|---|
| "C" & "K" Series | ||
| NV3500 | (2) 4.8 (2.3) | |
| NV4500 | (3) 8.0 (3.8) | |
| ZF S6-650 | (4) 12.6 (6.0) | |
| "E" Series (Suzuki 5-Speed M59) | (3) 4.0 (1.9) | |
| "J" Series (Suzuki 5-Speed M59) | (3) 3.2 (1.5) | |
| "S" & "T" Series | ||
| 2.2L (NV1500) | (5) 5.8 (2.7) | |
| 4.3L (NV3500) | (2) 4.2 (2.0) | |
| "Z" Series (Saturn 5-Speed MG3) | (6) 3.6 (1.7) | |
| (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). (5) Synchromesh Transmission Fluid (GM 12377916). (6) Dexron-III ATF (P/N 21019223) | ||
| (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). |
| (5) | Synchromesh Transmission Fluid (GM 12377916). |
| (6) | Dexron-III ATF (P/N 21019223) |
FLUID CAPACITY (MANUAL TRANSMISSION) (1)
SERVICE INTERVALS & SPECIFICATIONS
| Component | Interval (Miles) | ||
|---|---|---|---|
| "A" & "B" Series | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | (2) | ||
| Automatic Transmission Fluid & Filter | (3) | ||
| Differential Fluid | (4) | ||
| Engine Coolant | (5) | ||
| Fuel Filter | (6) | ||
| Oil & Oil Filter | (7) | ||
| Spark Plugs | 100,000 | ||
| "C" & "K" Series | |||
| Diesel Engine | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Automatic Transmission Fluid & Filter | (8) | ||
| Engine Coolant | (5) | ||
| Fuel Filter | (2) | ||
| Oil & Oil Filter | (9) | ||
| Gasoline Engine | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | 30,000 | ||
| Automatic Transfer Case Fluid | 50,000 | ||
| Automatic Transmission Fluid & Filter | (10) | ||
| Engine Coolant | 150,000 | ||
| Fuel Filter | 30,000 | ||
| Manual Transmission Fluid | (11) | ||
| Oil & Oil Filter | (7) | ||
| Spark Plugs | 100,000 | ||
| "E" & "J" Series | |||
| Accessory Drive Belt | (12) | ||
| Air Filter | 30,000 | ||
| Automatic Transmission Fluid & Filter | (13) | ||
| Brake Fluid | 60,000 | ||
| Differential Fluid | 30,000 | ||
| Engine Coolant | (14) | ||
| Fuel Filter | 30,000 | ||
| Manual Transmission Fluid | 30,000 | ||
| Oil & Oil Filter | (15) | ||
| PCV Valve | 50,000 | ||
| Spark Plug | 60,000 | ||
| Spark Plug Wires | (16) | ||
| Transfer Case Fluid | 30,000 | ||
| "G" Series | |||
| Diesel Engine | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | (2) | ||
| Automatic Transmission Fluid & Filter | 50,000 | ||
| Engine Coolant | (5) | ||
| Fuel Filter | 30,000 | ||
| Oil & Oil Filter | (9) | ||
| CNG & Gasoline Engine | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | 30,000 | ||
| Automatic Transmission Fluid & Filter | (17) | ||
| Engine Coolant | 150,000 | ||
| Fuel Filter | 30,000 | ||
| High Pressure Regulator Filter (CNG Engine) | 60,000 | ||
| Oil & Oil Filter | (9) | ||
| Spark Plugs | (18) | ||
| "L" & "M" Series | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | 30,000 | ||
| Automatic Transmission Fluid & Filter | (2) | ||
| Engine Coolant | (5) | ||
| Fuel Filter | 30,000 | ||
| Oil & Oil Filter | (9) | ||
| PCV Valve | (1) 100,000 | ||
| Spark Plug | 100,000 | ||
| "S" & "T" Series | |||
| Blazer, Jimmy Canadian, Sonoma & S10 Pickup | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | 30,000 | ||
| Automatic Transfer Case Fluid | 50,000 | ||
| Automatic Transmission Fluid & Filter | (4) | ||
| Engine Coolant | (19) | ||
| Fuel Filter | (20) 30,000 | ||
| Oil & Oil Filter | (21) | ||
| Spark Plugs | 100,000 | ||
| Bravada, Envoy & TrailBlazer | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | (22) | ||
| Automatic Transfer Case Fluid | (23) | ||
| Automatic Transmission Fluid & Filter | (3) | ||
| Engine Coolant | (19) | ||
| Fuel Filter | 15,000 | ||
| Oil & Oil Filter | (24) | ||
| Spark Plugs | 100,000 | ||
| "U" Series | |||
| Accessory Drive Belt | (1) 60,000 | ||
| Air Filter | (2) | ||
| Automatic Transmission Fluid & Filter | (25) | ||
| Differential Fluid | (4) | ||
| Engine Coolant | (5) | ||
| Fuel Filter | (6) | ||
| Oil & Oil Filter | (7) | ||
| Spark Plugs | 100,000 | ||
| "Z" Series | |||
| Accessory Drive Belt | (26) | ||
| Air Filter | (2) | ||
| Automatic Transmission Fluid & Filter | (25) | ||
| Engine Coolant | 100,000 | ||
| Fuel Filter | 100,000 | ||
| Oil & Oil Filter | (27) | ||
| Spark Plugs | 100,000 | ||
| Timing Belt | (28) 100,000 | ||
| (1) Inspect and replace as necessary. (2) If used under severe conditions, replace every 15,000 miles. If used under normal conditions, replace every 30,000 miles. (3) 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 7500 miles. If used under normal conditions, periodic replacement is not required. (5) Replace every 150,000 miles or 60 months, whichever occurs first. (6) No scheduled replacement interval is given by manufacturer. Check and replace as necessary. (7) 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 occurs first. (8) On Allison LCT 1000 transmission only, replace at 15,000 miles if used under severe conditions. An all others, replace at 50,000 miles. (9) If used under severe conditions, replace every 3000 miles or 3 months, whichever occurs first. If used under normal conditions, replace every 7500 miles or 12 months, whichever occurs first. (10) On vehicles equipped with 8.1L engine and Allison LCT 1000 transmission, replace at 25,000 miles if used under severe conditions. If used under normal conditions, replace at 50,000. 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. (11) On Cab & Chassis, periodic replacement is not required. On vehicles equipped with 4.3L or 4.8L engine, replace at 150,000 miles. On vehicles equipped with 6.0L engine, replace at 200,000 miles. (12) Inspect every 30,000 miles or 24 months, whichever occurs first. Replace as necessary. (13) If used under sever conditions, replace every 15,000 miles or 7.5 months, whichever occurs first. If used under normal conditions, replace every 100,000 miles. (14) Replace every 30,000 miles or 30 months, whichever occurs first. (15) Replace every 7500 miles or 7.5 months, whichever occurs first. (16) Replace every 60,000 miles or 60 months, whichever occurs first. (17) If vehicle's 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. (18) On CNG engine, replace at 60,000 miles. On Gasoline engine, replace at 100,000 miles. (19) Replace every 150,000 miles or 60 months, whichever occurs first. (20) Replace on 4.3L engine only. Information for replacement interval on 2.2L engine is not available from manufacturer. (21) Replace every 7500 miles or 12 months, whichever occurs first. (22) Inspect air cleaner indicator replacement at every oil and filter change. Replace as necessary. (23) On Bravada, replace every 50,000 miles. On all others, if used under severe conditions, replace every 15,000 miles. If used under normal conditions, replace every 100,000 miles. (24) If used under severe conditions, replace every 3000 miles. If used under normal conditions, replace as indicated by CHANGE OIL SOON light, every 10,000 miles or every 12 months, whichever occurs first. (25) If used under severe conditions, replace every 50,000 miles. If used under normal conditions, periodic replacement is not required. (26) Inspect every 18,000 miles or 12 months, whichever occurs first. Replace as necessary. (27) If used under severe conditions, replace every 3000 miles or 3 months, whichever occurs first. If used under normal conditions, replace as indicated by CHANGE OIL SOON light or every 7500 miles, whichever occurs first. (28) Applies to 3.0L engine only. | |||
| (1) | Inspect and replace as necessary. |
| (2) | If used under severe conditions, replace every 15,000 miles. If used under normal conditions, replace every 30,000 miles. |
| (3) | 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 7500 miles. If used under normal conditions, periodic replacement is not required. |
| (5) | Replace every 150,000 miles or 60 months, whichever occurs first. |
| (6) | No scheduled replacement interval is given by manufacturer. Check and replace as necessary. |
| (7) | 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 occurs first. |
| (8) | On Allison LCT 1000 transmission only, replace at 15,000 miles if used under severe conditions. An all others, replace at 50,000 miles. |
| (9) | If used under severe conditions, replace every 3000 miles or 3 months, whichever occurs first. If used under normal conditions, replace every 7500 miles or 12 months, whichever occurs first. |
| (10) | On vehicles equipped with 8.1L engine and Allison LCT 1000 transmission, replace at 25,000 miles if used under severe conditions. If used under normal conditions, replace at 50,000. 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. |
| (11) | On Cab & Chassis, periodic replacement is not required. On vehicles equipped with 4.3L or 4.8L engine, replace at 150,000 miles. On vehicles equipped with 6.0L engine, replace at 200,000 miles. |
| (12) | Inspect every 30,000 miles or 24 months, whichever occurs first. Replace as necessary. |
| (13) | If used under sever conditions, replace every 15,000 miles or 7.5 months, whichever occurs first. If used under normal conditions, replace every 100,000 miles. |
| (14) | Replace every 30,000 miles or 30 months, whichever occurs first. |
| (15) | Replace every 7500 miles or 7.5 months, whichever occurs first. |
| (16) | Replace every 60,000 miles or 60 months, whichever occurs first. |
| (17) | If vehicle's 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. |
| (18) | On CNG engine, replace at 60,000 miles. On Gasoline engine, replace at 100,000 miles. |
| (19) | Replace every 150,000 miles or 60 months, whichever occurs first. |
| (20) | Replace on 4.3L engine only. Information for replacement interval on 2.2L engine is not available from manufacturer. |
| (21) | Replace every 7500 miles or 12 months, whichever occurs first. |
| (22) | Inspect air cleaner indicator replacement at every oil and filter change. Replace as necessary. |
| (23) | On Bravada, replace every 50,000 miles. On all others, if used under severe conditions, replace every 15,000 miles. If used under normal conditions, replace every 100,000 miles. |
| (24) | If used under severe conditions, replace every 3000 miles. If used under normal conditions, replace as indicated by CHANGE OIL SOON light, every 10,000 miles or every 12 months, whichever occurs first. |
| (25) | If used under severe conditions, replace every 50,000 miles. If used under normal conditions, periodic replacement is not required. |
| (26) | Inspect every 18,000 miles or 12 months, whichever occurs first. Replace as necessary. |
| (27) | If used under severe conditions, replace every 3000 miles or 3 months, whichever occurs first. If used under normal conditions, replace as indicated by CHANGE OIL SOON light or every 7500 miles, whichever occurs first. |
| (28) | Applies to 3.0L engine only. |
REPLACEMENT INTERVALS
BELT TENSION
| Application | (1) Belt Deflection | ||
|---|---|---|---|
| 2.0L | |||
| Accessory Drive Belt | (2) | ||
| Water Pump | |||
| New Belt | 0.16-0.20" (4.1-5.1 mm) | ||
| Used Belt (3) | 0.20-0.27" (5.1-6.9 mm) | ||
| 2.5L | |||
| A/C Compressor | 0.16-0.28" (4.1-7.1 mm) | ||
| Generator/Water Pump | |||
| New Belt | 0.28-0.35" (7.1-8.9 mm) | ||
| Used Belt (3) | 0.35-0.43" (8.9-11.0 mm) | ||
| Power Steering | 0.16-0.28" (4.1-7.1 mm) | ||
| All Others (Serpentine Belt) | (2) | ||
| (1) Deflection is with 22 lbs. (10 kg) pressure applied midway on longest belt run. (2) Adjustment of serpentine belt is not necessary. Belt tension is maintained by spring-tensioned idler pulley (some equipped with belt wear indicator). (3) Used belt is a belt in operation for more than 5 minutes. | |||
| (1) | Deflection is with 22 lbs. (10 kg) pressure applied midway on longest belt run. |
| (2) | Adjustment of serpentine belt is not necessary. Belt tension is maintained by spring-tensioned idler pulley (some equipped with belt wear indicator). |
| (3) | Used belt is a belt in operation for more than 5 minutes. |
BELT ADJUSTMENT
ENGINE COMPRESSION
| Application | Specification - psi (kPa) | ||
|---|---|---|---|
| Normal Compression Pressure | |||
| 2.0L | 199 (1372.1) | ||
| 2.2L | |||
| Sonoma & S10 Pickup | (1) | ||
| VUE | 185-225 (1275.6-1551.4) | ||
| 2.5L | 199-227 (1372.1-1565.2) | ||
| 3.0L | 180-190 (1241.1-1310.1) | ||
| 4.2L | 215 (1482.4) | ||
| 4.3L | (2) | ||
| 4.8L, 5.3L & 6.0L | |||
| Except Sierra & Silverado | (1) | ||
| Sierra & Silverado | (2) | ||
| 5.0L & 5.7L | (2) | ||
| 6.5L | (2) | ||
| 6.6L | (2) | ||
| All Others | (1) | ||
| Minimum Compression Pressure | |||
| 2.0L | 170 (1172.2) | ||
| 2.2L | |||
| Sonoma & S10 Pickup | (1) | ||
| VUE | 185 (1275.6) | ||
| 2.5L | 185 (1275.6) | ||
| 3.0L | 100 (689.5) | ||
| 4.2L | (3) | ||
| 4.3L | (2) | ||
| 4.8L, 5.3L & 6.0L | |||
| Except Sierra & Silverado | (1) | ||
| Sierra & Silverado | (2) | ||
| 5.0L & 5.7L | (2) | ||
| 6.5L | (4) 370 (2551.2) | ||
| 6.6L | 300 (2068.5) | ||
| All Others | (1) | ||
| Compression Variance | |||
| 2.0L & 2.5L | 15 (103.4) | ||
| 6.6L | 50 (344.8) | ||
| All Others | (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. (3) Lowest compression reading should not be less than 70 percent of highest compression reading. (4) Subtract 8 psi (55.2 kPa) for every 1000 ft. (304.8 M) of elevation above seal level. Measurement is taken with cold engine speed of at least 100 RPM, or hot engine speed of at least 180 RPM. | |||
| (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. |
| (3) | Lowest compression reading should not be less than 70 percent of highest compression reading. |
| (4) | Subtract 8 psi (55.2 kPa) for every 1000 ft. (304.8 M) of elevation above seal level. Measurement is taken with cold engine speed of at least 100 RPM, or hot engine speed of at least 180 RPM. |
ENGINE COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
| Application | In. (mm) | |
|---|---|---|
| 6.6L | ||
| Intake & Exhaust | 0.012 (0.30) | |
| All Others | (1) | |
| (1) Equipped with hydraulic lifters. Adjustment is not required. | ||
| (1) | Equipped with hydraulic lifters. Adjustment is not required. |
VALVE CLEARANCE SPECIFICATIONS
HIGH TENSION WIRE RESISTANCE
| Application | Ohms | |
|---|---|---|
| 2.0L, 2.5L, 3.0L & 4.2L | (1) | |
| 2.2L | ||
| Sonoma & S10 Pickup | 12,000 Per Ft. | |
| VUE | (1) | |
| 3.4L | 3000 Per Ft. | |
| 4.3L, 4.8L, 5.3L, 6.0L & 8.1L | 1000 Per Ft. | |
| 5.0L & 5.7L | 700 Per Ft. | |
| (1) Not equipped with high tension wires. Ignition coils are connected directly to spark plugs by boots. | ||
| (1) | Not equipped with high tension wires. Ignition coils are connected directly to spark plugs by boots. |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
| Application | Type | Part No. | |
|---|---|---|---|
| 2.0L & 2.5L | Denso | K20PR-U11 Or SK16PR11 | |
| NGK | BKR6E11 Or 1FR5J11 | ||
| 2.2L | |||
| Sonoma & S10 Pickup | AC | 41-948 | |
| VUE | GM | 12569190 | |
| 3.0L | Bosch | FLR-LTE | |
| 3.4L | AC | 41-940 | |
| 4.2L | AC | 41-965 | |
| 4.3L | AC | R41-932 | |
| 4.8L, 5.3L & 6.0L | AC | 25171803 | |
| NGK | 12567759 | ||
| 5.0L | AC | 41-952 | |
| 5.7L | |||
| CNG Engine | AC | 41-932 | |
| Gasoline Engine | AC | 41-952 | |
| 8.1L | Denso | TJ14R-P15 | |
SPARK PLUG TYPE
| Application | Gap - In. (mm) | Torque - Ft. Lbs. (N.m) | |
|---|---|---|---|
| 2.0L & 2.5L | .039-.043 (1.0-1.1) | 18 (25) | |
| 2.2L | |||
| Sonoma & S10 Pickup | .040 (1.02) | 13 (18) | |
| VUE | .045 (1.14) | 15 (20) | |
| 3.0L | .035-.043 (0.9-1.1) | 15 (20) | |
| 4.2L | .050 (1.27) | 13 (18) | |
| 4.3L | .060 (1.52) | 11 (15) | |
| 8.1L | .060 (1.52) | 15 (20) | |
| All Others | Iridium .040 in. (1.04 mm) Platinum .060 in. (1.52 mm) | 11 (15) | |
SPARK PLUG SPECIFICATIONS
FIRING ORDER
Note. For firing order, refer to appropriate illustration. (Scheme 1)- (Scheme 9).
Scheme 1
Scheme 2
Scheme 3
Scheme 4
Scheme 5
Scheme 6
Scheme 7
Scheme 8
Scheme 9
EXCEPT TRACKER
All models are equipped with an electronic computer-controlled ignition system. Ignition timing is not adjustable.
TRACKER
Timing should be set to 5 degrees BTDC. For adjustment procedure, see appropriate ON-VEHICLE ADJUSTMENTS article.
INJECTION PUMP TIMING (DIESEL)
Injection pump timing can be checked using scan tool. For adjustment procedure, see appropriate ON-VEHICLE ADJUSTMENTS article.
FUEL PUMP
| Application | Psi (kPa) | |
|---|---|---|
| 2.0L & 2.5L | (1) 36-43 (248.2-296.5) | |
| 2.2L | ||
| Sonoma & S10 Pickup | 41-47 (282.7-324.1) | |
| VUE | 50-60 (344.8-413.7) | |
| 3.0L | 50-60 (344.8-413.7) | |
| 3.4L | 52-59 (358.5-406.8) | |
| 4.2L | 48-52 (331.0-358.5) | |
| 4.3L | ||
| Astro, Safari, Sierra & Silverado | 55-62 (379.2-427.5) | |
| Blazer, Express, Jimmy Canadian, Savana, Sonoma & S10 | 60-66 (413.7-455.1) | |
| 4.8L, 5.3L & 6.0L | ||
| Ethanol (VIN "Z") | 48-54 (331.0-372.3) | |
| Gasoline (VIN "V", "T" Or "U") | 55-62 (379.2-427.5) | |
| 5.0L | 59-66 (406.8-455.1) | |
| 5.7L | ||
| CNG Engine | 130-220 (896.4-1516.9) | |
| Gasoline Engine | 59-66 (406.8-455.1) | |
| 6.5L | ||
| Non-Turbo Engine | (2) 1500 (10,342.5) | |
| Turbo Engine | (2) 1700 (11,721.5) | |
| 6.6L | (3) 23,206 (160,005.4) | |
| 8.1L | 55-62 (379.2-427.5) | |
| (1) Pressure should maintain at least 25 psi (172.4 kPa) for one minute after fuel pump is turned off. (2) Measured on diesel fuel injection nozzle side. (3) Measured on fuel injection pump high pressure side. | ||
| (1) | Pressure should maintain at least 25 psi (172.4 kPa) for one minute after fuel pump is turned off. |
| (2) | Measured on diesel fuel injection nozzle side. |
| (3) | Measured on fuel injection pump high pressure side. |
FUEL PUMP PERFORMANCE
INJECTOR RESISTANCE
| Application | Ohms | |
|---|---|---|
| 2.0L | 13-16 | |
| 2.2L | ||
| Sonoma & S10 Pickup | 11-14 | |
| VUE | 12-13 | |
| 2.5L | 9-14 | |
| 3.0L | 15.1-15.9 | |
| All Others | 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 unless specified otherwise. For further testing procedures, refer to appropriate SELF-DIAGNOSTICS or SYSTEM & COMPONENT TESTING article.
Note. On some engines, throttle control is electronic with NO mechanical link from engine to accelerator pedal. The PCM monitors the position of accelerator pedal based on signals from a non-adjustable Accelerator Pedal Position (APP) module. The APP module may be mounted above or below the accelerator pedal.
| Application | (1) Voltage | |
|---|---|---|
| 2.0L | 0.5-1.2 To 3.4-4.7 | |
| 2.2L | ||
| Sonoma & S10 Pickup | 1.0- 4.0 | |
| VUE | (2) | |
| 2.5L | 0.4-1.2 To 3.4-4.7 | |
| 3.0L | (3) | |
| 3.4L, 4.3L, 4.8L, 5.3L & 6.0L | 1.0-4.0 | |
| 4.2L | (4) | |
| 5.0L | 1.2-4.5 | |
| 5.7L | ||
| CNG Engine | 0.5-4.0 | |
| Gasoline Engine | 1.2-4.5 | |
| 6.5L | (5) | |
| 6.6L | (6) | |
| 8.1L | ||
| Sensor 1 | (7) | |
| Sensor 2 | (7) | |
| (1) Voltage range is from idle to wide open throttle. (2) TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage ranges from 4.25 volts with throttle closed to 0.59 volt at wide open throttle. TP sensor 2 signal voltage ranges from 0.75 volt with throttle closed to 4.41 volts at wide open throttle. (3) TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage ranges from 0.50 volt with throttle closed to 4.15-4.35 volts at wide open throttle. TP sensor 2 signal voltage ranges from 4.45 volts with throttle closed to 0.60-0.80 volt at wide open throttle. (4) TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage is about 5 volts with throttle closed and decreases as throttle is opened. TP sensor 2 signal voltage increases as throttle is moved from a closed position to wide open throttle position. (5) 6.5L diesel engine PCM uses 3 Accelerator Pedal Position (APP) sensors in a module rather than a Throttle Position (TP) sensor to control fuel delivery. PCM requires information from APP 1 sensor only, other sensors act as fail-safes. APP 1 sensor voltage ranges from about 0.35-0.95 volt with throttle closed to more than 4 volts at wide open throttle. APP 2 sensor voltage ranges from about 4.5 volts with throttle closed to about one volt at wide open throttle. APP 3 sensor voltage ranges from about 4 volts with throttle closed to about 2.5 volts at wide open throttle. (6) 6.6L diesel engine PCM uses 3 Accelerator Pedal Position (APP) sensors in a module rather than a Throttle Position (TP) sensor to control fuel delivery. PCM requires information from APP 1 sensor only, other sensors act as fail-safes. APP 1 sensor voltage ranges from 0.52-0.80 volt with throttle closed to 2.12-2.65 volts at wide open throttle. APP 2 sensor voltage ranges from 4.25-4.53 volts with throttle closed to 2.40-2.93 volts at wide open throttle. APP 3 sensor voltage ranges from 3.95-4.13 volts with throttle closed to 2.76-3.16 volts at wide open throttle. (7) TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage ranges from about one volt with throttle closed to more than 3.5 volts at wide open throttle. TP sensor 2 signal voltage ranges from about 4 volts with throttle closed to less than 1.5 volts at wide open throttle. | ||
| (1) | Voltage range is from idle to wide open throttle. |
| (2) | TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage ranges from 4.25 volts with throttle closed to 0.59 volt at wide open throttle. TP sensor 2 signal voltage ranges from 0.75 volt with throttle closed to 4.41 volts at wide open throttle. |
| (3) | TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage ranges from 0.50 volt with throttle closed to 4.15-4.35 volts at wide open throttle. TP sensor 2 signal voltage ranges from 4.45 volts with throttle closed to 0.60-0.80 volt at wide open throttle. |
| (4) | TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage is about 5 volts with throttle closed and decreases as throttle is opened. TP sensor 2 signal voltage increases as throttle is moved from a closed position to wide open throttle position. |
| (5) | 6.5L diesel engine PCM uses 3 Accelerator Pedal Position (APP) sensors in a module rather than a Throttle Position (TP) sensor to control fuel delivery. PCM requires information from APP 1 sensor only, other sensors act as fail-safes. APP 1 sensor voltage ranges from about 0.35-0.95 volt with throttle closed to more than 4 volts at wide open throttle. APP 2 sensor voltage ranges from about 4.5 volts with throttle closed to about one volt at wide open throttle. APP 3 sensor voltage ranges from about 4 volts with throttle closed to about 2.5 volts at wide open throttle. |
| (6) | 6.6L diesel engine PCM uses 3 Accelerator Pedal Position (APP) sensors in a module rather than a Throttle Position (TP) sensor to control fuel delivery. PCM requires information from APP 1 sensor only, other sensors act as fail-safes. APP 1 sensor voltage ranges from 0.52-0.80 volt with throttle closed to 2.12-2.65 volts at wide open throttle. APP 2 sensor voltage ranges from 4.25-4.53 volts with throttle closed to 2.40-2.93 volts at wide open throttle. APP 3 sensor voltage ranges from 3.95-4.13 volts with throttle closed to 2.76-3.16 volts at wide open throttle. |
| (7) | TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage ranges from about one volt with throttle closed to more than 3.5 volts at wide open throttle. TP sensor 2 signal voltage ranges from about 4 volts with throttle closed to less than 1.5 volts at wide open throttle. |
THROTTLE POSITION (TP) SENSOR VOLTAGE
See also:
• MODEL IDENTIFICATION