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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 924 (Engine Controls And Fuel - 6.6L (LMM) - Diagnosis & Troubleshooting) >> Fuel System Diagnosis >> Typical Supply Side Vacuum

Typical Supply Side Vacuum

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fuel System Diagnosis

Engine Speed/Load Vacuum
Cranking 5 in Hg
Idle Speed 1-3 in Hg
Hard Accelerations 6-10 in Hg
3000 RPM - No Load 3-5 in Hg
2750-3000 RPM- Full Load 10-12 in Hg
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