Avalanche, Sierra, Silverado, C&K Series, 1999-2005

Gasoline Engine Tune-Up Specifications

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GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
19994.3W0.060--58-64600625HYDHYD
  4.8V0.060--55-62--HYDHYD
  5.0M0.060--60-66650 -550HYDHYD
  5.3T0.060--55-62--HYDHYD
  5.7R0.060--60-66660 -525HYDHYD
  6.0U0.060--55-62--HYDHYD
  7.4J0.060--60-66750 -675 -HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
5- Under 8500 GVW
6- Over 8500 GVW
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
20004.3W0.060--58-64600625HYDHYD
  4.8V0.060--55-62--HYDHYD
  5.0M0.060--60-66650 -550HYDHYD
  5.3T0.060--55-62--HYDHYD
  5.7R0.060--60-66660 -525HYDHYD
  6.0U0.060--55-62--HYDHYD
  7.4J0.060--60-66750 -675 -HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
5- Under 8500 GVW
6- Over 8500 GVW
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
20014.3W0.060--58-64600625HYDHYD
  4.8V0.060--55-62--HYDHYD
  5.0M0.060--60-66650 -550HYDHYD
  5.3T0.060--55-62--HYDHYD
  5.7R0.060--60-66660 -525HYDHYD
  6.0U0.060--55-62--HYDHYD
  8.1G0.060--55-62--HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
5- Under 8500 GVW
6- Over 8500 GVW
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
20024.3W0.060--58-64600625HYDHYD
  4.8V0.060--55-62--HYDHYD
  5.0M0.060--60-66650 -550HYDHYD
  5.3T0.060--55-62--HYDHYD
  5.3Z0.060--55-62--HYDHYD
  5.7R0.060--60-66660 -525HYDHYD
  6.0U0.060--55-62--HYDHYD
  8.1G0.060--55-62--HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
5- Under 8500 GVW
6- Over 8500 GVW
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
20034.3X0.060--58-64600625HYDHYD
  4.8V0.060--55-62--HYDHYD
  5.3T0.060--55-62--HYDHYD
  5.3Z0.060--55-62--HYDHYD
  6.0N0.060--55-62--HYDHYD
  6.0U0.060--55-62--HYDHYD
  8.1G0.060--55-62--HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
5- Under 8500 GVW
6- Over 8500 GVW
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
20044.3X0.060--58-64600625HYDHYD
  4.8V0.060--55-62--HYDHYD
  5.3T0.060--55-62--HYDHYD
  5.3Z0.060--55-62--HYDHYD
  6.0N0.060--55-62--HYDHYD
  6.0U0.060--55-62--HYDHYD
  8.1G0.060--55-62--HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
5- Under 8500 GVW
6- Over 8500 GVW
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
20054.3X0.060--55-62600625HYDHYD
  4.8V0.060--55-62--HYDHYD
  5.3B0.060--55-62--HYDHYD
  5.3T0.060--55-62--HYDHYD
  5.3Z0.060--55-62--HYDHYD
  6.0N0.060--55-62--HYDHYD
  6.0U0.060--55-62--HYDHYD
  8.1G0.060--55-62--HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
5- Under 8500 GVW
6- Over 8500 GVW
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement LitersEngine VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
19995.7R0.060   -60-66-525HYDHYD
  7.4J0.060   -60-66-675 -HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine Displacement Liters (cc)Engine ID/VINSpark Plug Gap (in.)Ignition Timing (deg.)Fuel Pump (psi)Idle Speed (rmp)Valve Clearance (in.)
        MTAT   MTATIn.Ex.
19995.7 (5735)R0.060   -60-66 -   525HYDHYD
  7.4 (7440)J0.060   -60-66 -   675 -HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production. The label figures must be used if they differ from those in this chart.
2A Ignition timing is preset and cannot be adjusted
3B With key ON and engine OFF
4C Over 8500 GVW
5D Idle speed is maintained by the Powertrain Control Module (PCM)
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine ID/VINEngine Displacement LitersSpark Plug Gap (in.)Fuel Pump (psi)Ignition Timing (deg.)Idle Speed (rpm)Valve Clearance (in.)
          MTATMTATIn.Ex.
2005X4.30.06055-62 -----HYDHYD
  V4.80.06055-62 -----HYDHYD
  T5.30.06055-62 -----HYDHYD
  Z5.30.06055-62 -----HYDHYD
  U6.00.06055-62 -----HYDHYD
  G8.10.06055-62 -----HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
YearEngine ID/VINEngine Displacement LitersSpark Plug Gap (in.)Fuel Pump (psi)Ignition Timing (deg.)Idle Speed (rpm)Valve Clearance (in.)
          MTATMTATIn.Ex.
2005X4.30.06055-62 -----HYDHYD
  V4.80.06055-62 -----HYDHYD
  B5.30.06055-62 -----HYDHYD
  T5.30.06055-62 -----HYDHYD
  Z5.30.06055-62 -----HYDHYD
  U6.00.06055-62 -----HYDHYD
  N6.00.06055-62 -----HYDHYD
  G8.10.06055-62 -----HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production.
2- Ignition timing is preset and cannot be adjusted
3- With key ON and engine OFF
4- Idle speed is maintained by the Powertrain Control Module (PCM)
 
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